CN105840820A - Parking locking device used in vehicle transmission and transmission utilizing same - Google Patents
Parking locking device used in vehicle transmission and transmission utilizing same Download PDFInfo
- Publication number
- CN105840820A CN105840820A CN201610349020.9A CN201610349020A CN105840820A CN 105840820 A CN105840820 A CN 105840820A CN 201610349020 A CN201610349020 A CN 201610349020A CN 105840820 A CN105840820 A CN 105840820A
- Authority
- CN
- China
- Prior art keywords
- parking
- pawl
- transmission
- park pawl
- ratchet wheel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- 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
- F16H63/34—Locking or disabling mechanisms
- F16H63/3416—Parking lock mechanisms or brakes in the transmission
- F16H63/3425—Parking lock mechanisms or brakes in the transmission characterised by pawls or wheels
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear-Shifting Mechanisms (AREA)
Abstract
The invention discloses a parking locking device used in a vehicle transmission and a transmission utilizing same. The parking locking device comprises parking pawls, a pawl base used for mounting the parking pawls in a pivotal manner and a parking ratchet wheel, circumference of which is fixed on a power input shaft of the transmission to rotate along with the power input shaft, wherein the at least two parking pawls are arranged along the outer side of the circumference of the parking ratchet wheel, and one of the parking pawls is engaged with the parking ratchet wheel to form brake locking while the power input shaft is reversed; a pivotal end is formed at one end of each parking pawl, and an engaged end is formed at the other end of each parking pawl to abut against and fit to an outer gear ring of the parking ratchet wheel all the time. The parking locking device is suitable for preventing a vehicle from reversing; after power shutoff, a transmission shaft of the transmission can be effectively prevented from reversing or the vehicle can be effectively prevented from reversing while each pawl can form brake engage, or one pawl is instantly jointed with ratchet teeth of the parking ratchet wheel, so that the rotation stroke of the parking ratchet wheel is reduced; relatively great impact force is prevented from being generated when the pawls are jointed with ratchet teeth of the parking ratchet wheel, so that the parking pawls are prevented from being damaged; and meanwhile, the noises and the vibrations are reduced.
Description
Technical field
The present invention relates to vehicular field, particularly to a kind of parking lock device in transmission for vehicles and
Variator.
Background technology
Along with the development of economy and improving constantly of people's living standard so that automobile is increasingly by people
Favor, thus accelerate the developing steps of automobile industry.Wherein, in the parking mode of existing automobile,
Operator utilize the parking brake on automobile to make automobile be in halted state, thus reach the purpose of automobile parking.But
Above-mentioned parking mode is only aimed on the smooth road surface of automobile, when automobile parking is on acclive road surface,
Utilize merely parking brake mode parking that automobile can be made to move on the road surface of the gradient, in order to avoid automobile is on the road of the gradient
Move on face, it is common practice to, also need to hang over gear when automobile parking parking on acclive road surface
In one grade or reverse gear, the engagement between the gear on gear and engine rotation resistance is utilized to be braked, but this
Sample causes damage to the gear of the variator of automobile and electromotor, and aforesaid operations needs preferably to operate skill
Art, on the ramp that the gradient is bigger during starting, even skilled driver processes and bad vehicle also can occur
The accident slipped by slope.
Accordingly, it is desirable to provide a kind of parking locking mechanism, simple in construction, arrange that easily cost is relatively low, and makes
It can bear top load, reaches to prevent from slipping by slope when vehicle climbing starts the generation of phenomenon, thus improves parking
Safety.
Summary of the invention
In view of this, the present invention provides a kind of parking lock device in transmission for vehicles and variator thereof,
Simple in construction, arranges that easily cost is relatively low, and can bear top load, reaches to start in vehicle climbing
Time prevent from slipping by slope the generation of phenomenon, thus improve parking safety.
The parking lock device in transmission for vehicles of the present invention, including park pawl, for park pawl
The pawl base being pivotally mounted and circumference are fixed on the power input shaft of variator to rotate with power input shaft
Parking ratchet wheel, park pawl arranges at least two along parking ratchet wheel outer circumference and at least one is defeated at power
Engage formation brake lock when entering axle reversing with parking ratchet wheel, each park pawl one end forms pivot end, another
End forms end of engagement and abuts cooperation all the time with the external toothing of parking ratchet wheel.
Further, park pawl is circumferentially placed equidistant and the circumferential lengths of each park pawl；Or, often
The circumferential lengths of one park pawl is equal and park pawl circumferentially non-equidistant placement.
Further, the pivot end of park pawl is circumferentially placed equidistant and the circumferential lengths size edge of park pawl is nibbled
Close direction to successively decrease successively；Or, the pivot end center of the equal and adjacent park pawl of the length of each park pawl exists
The central angle size that the camber line of the line formation on circumferencial direction is corresponding is successively decreased successively along engagement direction.
Further, the ratchet number of parking ratchet wheel and the number ratio of park pawl are 2-3.
Further, park pawl arranges five, and the park pawl being in engagement position under engagement is initial,
It is at the out of phase of the ratchet back of tooth of parking ratchet wheel along remaining park pawl of engagement direction.
Further, the flank of tooth of the ratchet of parking ratchet wheel includes back of tooth guiding surface, back of tooth end face and flank arc successively
Face, park pawl includes pawl body and ratchet head integrated with pawl body, and ratchet head front end is formed to be used
In the stop section engaged suitable with flank cambered surface, ratchet head lower surface is formed for guiding surface sliding contact
Sliding plane.
Further, the pawl body of each park pawl tapers into end of engagement thickness from pivot end.
Further, corresponding each park pawl is provided with for the flank of tooth by the end of engagement of park pawl Yu parking ratchet wheel
The elastic component abutted.
Further, pawl base is for be arranged by transmission case body by integral forming, and the middle part of pawl base is provided with axle via.
The invention also discloses the variator of a kind of utilization parking lock device in transmission for vehicles, speed change
Device is provided with the parking lock device in transmission for vehicles.
Beneficial effects of the present invention: the parking lock device in transmission for vehicles of the present invention and speed change thereof
Device, by arranging parking ratchet wheel on the power shaft of variator, and arranges at least two park pawl and wherein
One of can engage with parking ratchet wheel when power input shaft reverses formation brake lock, for vehicle prevent reverse
Falling back, when can effectively prevent variator axle from reversing or vehicle reverse after power cut, and each ratchet can be same
Time form braking engagement, or one of them engages immediately with the ratchet of parking ratchet wheel, reduces parking ratchet wheel rotation
Stroke, it is to avoid produce greater impact power when ratchet engages with the ratchet of parking ratchet wheel, thus prevent parking spine
Pawl causes damage, reduces noise and vibration simultaneously.This parking lock device simple in construction, easy to install,
Cost is relatively low and the suitability is relatively strong, can be widely applied to automobile, tractor, tricycle, micro-four-wheel electric motor car
Transmission assembly or power transmission shaft on.
Accompanying drawing explanation
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
The structural representation that Fig. 1 provides for the embodiment of the present invention is used for the parking lock device in transmission for vehicles
First embodiment structural representation；
The structural representation that Fig. 2 provides for the embodiment of the present invention is used for the parking lock device in transmission for vehicles
Second example structure schematic diagram；
The structural representation that Fig. 3 provides for the embodiment of the present invention is used for the parking lock device in transmission for vehicles
3rd example structure schematic diagram；
Fig. 4 is park pawl structural representation in the present invention.
Detailed description of the invention
The structural representation that Fig. 1 provides for the embodiment of the present invention is used for the parking lock device in transmission for vehicles
First embodiment structural representation, the structural representation that Fig. 2 provides for the embodiment of the present invention is used for transmission for vehicles
In parking lock device the second example structure schematic diagram, the structural representation that Fig. 3 provides for the embodiment of the present invention
Figure parking lock device the 3rd example structure schematic diagram in transmission for vehicles, Fig. 4 is to stay in the present invention
Car pawl structures schematic diagram is as shown in the figure: the parking lock device in transmission for vehicles of the present embodiment, bag
Include park pawl 1, the pawl base 2 being pivotally mounted for park pawl 1 and circumference and be fixed on the power of variator
With the parking ratchet wheel 3 rotated with power input shaft on power shaft, park pawl 1 is along parking ratchet wheel 3 outer circumference
At least two is set and at least one engages formation braking when power input shaft 4 reverses with parking ratchet wheel 3
Locking, each park pawl 1 one end formed pivot end 1-1, the other end formed end of engagement 1-2 and with parking spine
The external toothing of wheel 3 abuts cooperation all the time；Wherein parking ratchet wheel 3 can be fixed on variator by bonded circumference
On power input shaft 4, bonded for spline connect or locking key, power input shaft 4 refers to the power transmission shaft of speed change,
When there is intermediate propeller shaft, owing to intermediate propeller shaft also belongs to the power shaft for power input, parking spine
Wheel 3 may be provided on intermediate propeller shaft equally；When the power input shaft 4 of variator rotates for power input,
Parking ratchet wheel 3 and park pawl 1 separate, and do not engage, and do not interfere with the power output of variator, when stopping
Car is stayed dynamic when slipping by slope or fall back, and power input shaft 4 can reverse, and parking ratchet wheel 3 turns to engagement direction
Dynamic, engage with park pawl 1 and power input shaft 4 is braked.In prior art, ratchet generally sets
Put the ratchet of single corresponding engagement, when being adapted in the case of parking lock, time especially under case of heavy load, nibbling
Closing before occurring, ratchet is likely to be on the back of tooth of ratchet ratchet, and the faying face of distance engagement exists certain stroke,
When there is engagement, owing to can not immediately combine, bigger impulsive force, ratchet and teeth groove may be produced and combine
Producing impulsive force, impulsive force is big, and noise is high, vibrates the loudest, and impulsive force is too big, ratchet may be caused damage
Wound, even breaks time serious, and by arranging multiple ratchet, can make multiple ratchet in combination with, impulsive force drops
Low, or produce at least one ratchet and immediately combine, reduce engagement travel, thus reduce impulsive force.At above-mentioned knot
On the basis of structure, illustrate with specific embodiment below:
As it is shown in figure 1, be the first example structure of the present invention, wherein, the pivot end 1-1 of park pawl 1
Center is arranged with circle, is i.e. positioned on same circle, and pivot end 1-1 center refers to the axis (lower same) of drive-connecting shaft,
And the circumferential lengths of park pawl 1 is equal, under the present embodiment, when occurring parking ratchet wheel 3 to reverse, parking
Ratchet 1 engages with parking ratchet wheel 3 simultaneously, thus is substantially reduced impulsive force when single park pawl 1 engages.
As in figure 2 it is shown, be the second example structure of the present invention, in the present embodiment, park pawl 1 is circumferentially
It is placed equidistant and the circumferential lengths of each park pawl 1；And under this embodiment, park pawl 1 is along circle
It is placed equidistant referring to the circle that camber line that the line at the center of the pivot end 1-1 of adjacent park pawl 1 is formed is corresponding week
Heart angle equal in magnitude, and under this embodiment, the circumferential lengths size of park pawl 1 is along engagement direction successively
Successively decreasing, circumferential lengths refers to the length of the arc circumference along park pawl 1, owing to park pawl 1 structure is identical,
Only it is placed equidistant and circumferential lengths is inconsistent successively decreases successively, each ratchet ratchet with parking ratchet wheel 3 can be made
Joint distance, as in figure 2 it is shown, when there is engagement, at least park pawl 1 can be away from
The joint of corresponding ratchet is close together, it may occur that immediately combine, and then is substantially reduced parking ratchet wheel 3 and is produced
Engagement travel, reduce the purpose of impulsive force；It addition, engagement direction refers to parking ratchet wheel 3 and parking spine
Rotation direction when pawl 1 engages.
As it is shown on figure 3, be the third example structure of the present invention, in the present embodiment, each park pawl 1
Circumferential lengths is equal and park pawl 1 circumferentially non-equidistant placement；Non-equidistant placement refers to adjacent park pawl
The size of the central angle that camber line that the line at the center of the pivot end 1-1 of 1 is formed is corresponding is unequal, then in this reality
Executing in example, the pivot end 1-1 center of the equal and adjacent park pawl 1 of length of each park pawl 1 is at circumference
The central angle size that the camber line of the line formation on direction is corresponding is successively decreased successively along engagement direction；Equally reach
Make the joint distance of each ratchet and the ratchet of parking ratchet wheel 3, as it is shown on figure 3, occurring
During engagement, at least park pawl 1 can joint away from corresponding ratchet close together, it may occur that immediately tie
Close, and then be substantially reduced engagement travel produced by parking ratchet wheel 3, reduce the purpose of impulsive force.
On the basis of the concrete structure of above-mentioned three kinds of embodiments, above-mentioned three kinds of embodiments the most all comprise following interior
Hold: in the above embodiment of the present invention, the ratchet 3-1 number of parking ratchet wheel 3 and the number ratio of park pawl 1
For 2-3；In this ratio range, relatively compact structure can be formed, and the negative of each park pawl 1 can be reduced
Lotus, can significantly improve its functional reliability to the ratchet that physical dimension is strictly limited, and can be substantially reduced engagement
During the impact that produces and noise, reduce parking ratchet wheel 3 and the lateral impact load of power input shaft 4.
In the above embodiment of the present invention, park pawl 1 arranges five, to be in staying of engagement position under engagement
Car ratchet 1 is initial, is in the ratchet 3-1 back of tooth of parking ratchet wheel 3 along remaining park pawl 1 of engagement direction
At out of phase；Wherein engagement direction refers to rotation direction when parking ratchet wheel 3 engages with park pawl 1, when
When being at out of phase, the engagement travel of the most each park pawl of parking ratchet wheel 31 differs, and can realize i.e.
Time combine, with reach fast braking and realize reduce impulsive force purpose.
In the above embodiment of the present invention, the flank of tooth of the ratchet 3-1 of parking ratchet wheel 3 includes back of tooth guiding surface successively
3-2, back of tooth end face 3-3 and flank cambered surface 3-4, park pawl 1 include pawl body 1-3 and with ratchet this
Integrated ratchet head 1-4 of body 1-3, ratchet head 1-4 front end is formed for suitable with flank cambered surface 3-4
The stop section 1-5 of engagement, ratchet head 1-4 lower surface forms the sliding plane for guiding surface sliding contact
1-6；Form better fit structure, and stop section 1-5 therein seamlessly transit with sliding plane 1-6,
The place of being sequentially connected with of back of tooth guiding surface 3-2, back of tooth end face 3-3 and flank cambered surface 3-4 seamlessly transits, thus
Reduce because of the sound produced by the parking ratchet wheel 3 concavo-convex change of outer rim, and ensure meshing performance, parking spine during work
Pawl 1 is attached at parking ratchet wheel 3 outer rim all the time, and the tooth root of ratchet 3-1 is fillet, it is ensured that park pawl 1
Engagement property.
In the above embodiment of the present invention, pawl body 1-3 of each park pawl 1 from pivot end 1-1 to engagement
End 1-2 thickness tapers into；Increase the bonding strength of pawl body 1-3 pivot end 1-1, and end of engagement 1-2
Movable flexible, guide sliding contact good, and reach the purpose of loss of weight.
In the above embodiment of the present invention, corresponding each park pawl 1 is provided with for the end of engagement by park pawl 1
The elastic component 5 that 1-2 abuts with the flank of tooth of parking ratchet wheel 3；Wherein, elastic component is torsion spring, and the torsion of torsion spring will
Ratchet head 1-4 of park pawl 1 supports the ratchet 3-1 being only contacted with parking ratchet wheel 3 all the time.
In the above embodiment of the present invention, pawl base 2 for be arranged by transmission case body by integral forming, pawl base 2
Middle part is provided with axle via.
The invention also discloses the variator of a kind of utilization parking lock device in transmission for vehicles, speed change
Device is provided with the parking lock device in transmission for vehicles；The variator of the present embodiment can be to comprise reverse gear
Multi-speed transmission.
Finally illustrate, above example only in order to technical scheme to be described and unrestricted, although
With reference to preferred embodiment, the present invention is described in detail, it will be understood by those within the art that,
Technical scheme can be modified or equivalent, without deviating from technical solution of the present invention
Objective and scope, it all should be contained in the middle of scope of the presently claimed invention.
Claims (10)
1. the parking lock device in transmission for vehicles, it is characterised in that: include park pawl, use
The pawl base and the circumference that are pivotally mounted in park pawl are fixed on the power input shaft of variator with defeated with power
Enter axle rotate parking ratchet wheel, described park pawl along parking ratchet wheel outer circumference arrange at least two and at least its
One of engage with parking ratchet wheel when power input shaft reverses formation brake lock, each park pawl one end shape
Becoming pivot end, the other end forms end of engagement and abuts cooperation all the time with the external toothing of parking ratchet wheel.
Parking lock device in transmission for vehicles the most according to claim 1, it is characterised in that:
Park pawl is circumferentially placed equidistant and the circumferential lengths of each park pawl；Or, each park pawl
Circumferential lengths is equal and park pawl circumferentially non-equidistant placement.
Parking lock device in transmission for vehicles the most according to claim 2, it is characterised in that:
The pivot end of park pawl is circumferentially placed equidistant and direction is engaged successively in the circumferential lengths size edge of park pawl
Successively decrease；Or, the pivot end center of the equal and adjacent park pawl of the length of each park pawl is in a circumferential direction
Central angle size corresponding to camber line that formed of line successively decrease successively along engagement direction.
Parking lock device in transmission for vehicles the most according to claim 3, it is characterised in that:
The ratchet number of described parking ratchet wheel and the number ratio of park pawl are 2-3.
5. fill according to the parking lock in transmission for vehicles described in claim 1-4 any claim
Put, it is characterised in that: described park pawl arranges five, to be in the park pawl of engagement position under engagement
It is initial, is at the out of phase of the ratchet back of tooth of parking ratchet wheel along remaining park pawl of engagement direction.
Parking lock device in transmission for vehicles the most according to claim 1, it is characterised in that:
The flank of tooth of the ratchet of described parking ratchet wheel includes back of tooth guiding surface, back of tooth end face and flank cambered surface successively, described
Park pawl includes pawl body and ratchet head integrated with pawl body, and described ratchet head front end is formed to be used
In the stop section engaged suitable with flank cambered surface, ratchet head lower surface is formed for guiding surface sliding contact
Sliding plane.
Parking lock device in transmission for vehicles the most according to claim 6, it is characterised in that:
The pawl body of each park pawl tapers into end of engagement thickness from pivot end.
Parking lock device in transmission for vehicles the most according to claim 7, it is characterised in that:
Corresponding each park pawl is provided with the elasticity for being abutted by the end of engagement of park pawl with the flank of tooth of parking ratchet wheel
Part.
Parking lock device in transmission for vehicles the most according to claim 8, it is characterised in that:
Described pawl base is for be arranged by transmission case body by integral forming, and the middle part of described pawl base is provided with axle via.
10. the lock of the parking in transmission for vehicles that a kind utilizes described in claim 1-9 any claim
The variator of locking apparatus, it is characterised in that: described variator is provided with described parking in transmission for vehicles
Locking system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610349020.9A CN105840820A (en) | 2016-05-24 | 2016-05-24 | Parking locking device used in vehicle transmission and transmission utilizing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610349020.9A CN105840820A (en) | 2016-05-24 | 2016-05-24 | Parking locking device used in vehicle transmission and transmission utilizing same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105840820A true CN105840820A (en) | 2016-08-10 |
Family
ID=56594147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610349020.9A Pending CN105840820A (en) | 2016-05-24 | 2016-05-24 | Parking locking device used in vehicle transmission and transmission utilizing same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105840820A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107642605A (en) * | 2017-08-18 | 2018-01-30 | 潍柴动力股份有限公司 | The control device anti-slip for automobile and control method |
| CN108006222A (en) * | 2018-01-19 | 2018-05-08 | 吉林大学 | A kind of automatic transmission parking brake and its control method |
| CN111012275A (en) * | 2019-12-24 | 2020-04-17 | 珠海格力电器股份有限公司 | Dish washer divides liquid device and dish washer |
| CN112696314A (en) * | 2020-12-29 | 2021-04-23 | 诸暨和创电机科技有限公司 | Wind driven generator based on wind power braking mechanism |
| CN112796938A (en) * | 2020-12-29 | 2021-05-14 | 诸暨和创电机科技有限公司 | Wind driven generator based on multi-stage wind power braking device |
| FR3104664A1 (en) * | 2019-12-12 | 2021-06-18 | Psa Automobiles Sa | AUTOMATIC GEARBOX WITH REINFORCED PARKING FUNCTION |
| KR20210100015A (en) * | 2020-02-05 | 2021-08-13 | 이엠에스 기어 에스에 운트 코. 카케아아 | Locking device for parking brake and parking brake |
| CN113734118A (en) * | 2021-11-08 | 2021-12-03 | 杭州非古科技有限公司 | New energy automobile parking structure |
| CN114876976A (en) * | 2022-04-29 | 2022-08-09 | 上海美华汽车科技有限公司 | Disc type parking system |
| CN115199748A (en) * | 2022-07-11 | 2022-10-18 | 东风汽车集团股份有限公司 | Hydraulic control parking mechanism |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107642605A (en) * | 2017-08-18 | 2018-01-30 | 潍柴动力股份有限公司 | The control device anti-slip for automobile and control method |
| CN108006222A (en) * | 2018-01-19 | 2018-05-08 | 吉林大学 | A kind of automatic transmission parking brake and its control method |
| FR3104664A1 (en) * | 2019-12-12 | 2021-06-18 | Psa Automobiles Sa | AUTOMATIC GEARBOX WITH REINFORCED PARKING FUNCTION |
| CN111012275A (en) * | 2019-12-24 | 2020-04-17 | 珠海格力电器股份有限公司 | Dish washer divides liquid device and dish washer |
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| KR20210100015A (en) * | 2020-02-05 | 2021-08-13 | 이엠에스 기어 에스에 운트 코. 카케아아 | Locking device for parking brake and parking brake |
| CN113291269A (en) * | 2020-02-05 | 2021-08-24 | 亿迈齿轮两合股份公司 | Locking device for parking brake and parking brake |
| KR102500511B1 (en) * | 2020-02-05 | 2023-02-16 | 이엠에스 기어 에스에 운트 코. 카케아아 | Locking device for parking brake and parking brake |
| CN112796938A (en) * | 2020-12-29 | 2021-05-14 | 诸暨和创电机科技有限公司 | Wind driven generator based on multi-stage wind power braking device |
| CN112696314A (en) * | 2020-12-29 | 2021-04-23 | 诸暨和创电机科技有限公司 | Wind driven generator based on wind power braking mechanism |
| CN113734118A (en) * | 2021-11-08 | 2021-12-03 | 杭州非古科技有限公司 | New energy automobile parking structure |
| CN114876976A (en) * | 2022-04-29 | 2022-08-09 | 上海美华汽车科技有限公司 | Disc type parking system |
| CN114876976B (en) * | 2022-04-29 | 2024-06-07 | 上海美华汽车科技有限公司 | Disc type parking system |
| CN115199748A (en) * | 2022-07-11 | 2022-10-18 | 东风汽车集团股份有限公司 | Hydraulic control parking mechanism |
| CN115199748B (en) * | 2022-07-11 | 2023-09-05 | 东风汽车集团股份有限公司 | Hydraulic control parking mechanism |
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Application publication date: 20160810 |