CN106641242B - A kind of hydraulic parking push rod assembly, automatic transmission and automobile - Google Patents

A kind of hydraulic parking push rod assembly, automatic transmission and automobile Download PDF

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Publication number
CN106641242B
CN106641242B CN201510725857.4A CN201510725857A CN106641242B CN 106641242 B CN106641242 B CN 106641242B CN 201510725857 A CN201510725857 A CN 201510725857A CN 106641242 B CN106641242 B CN 106641242B
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China
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hydraulic
cylinder
piston
parking
cavity
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CN106641242A (en
Inventor
赵鹏飞
赵双
刘照远
马得朝
聂艳军
张浩源
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Beehive transmission technology Hebei Co., Ltd
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Great Wall Motor Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H63/00Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30Constructional features of the final output mechanisms
    • F16H63/34Locking or disabling mechanisms
    • F16H63/3416Parking lock mechanisms or brakes in the transmission
    • F16H63/3483Parking lock mechanisms or brakes in the transmission with hydraulic actuating means

Abstract

The present invention provides a kind of hydraulic parking push rod assembly, automatic transmission and automobiles, so that hydraulic parking push rod assembly is easily installed.The hydraulic parking push rod assembly includes the hydraulic cylinder with the first and second oilhole, piston body and hydraulic joint are equipped in it, hydraulic cylinder is divided into corresponding the first and second seal cavity being connected to the first and second oilhole, the second seal cavity is connected to the connector cavity of hydraulic joint;Cylinder top or the cylinder bottom are stretched out in one end of the piston rod of piston body, and are equipped with parking cam;According to the size relation of the oil pressure of first annular seal space body and the second seal cavity and total oil pressure of connector cavity, so that hydraulic joint is engaged and is separated with piston rod, realize non-parking and parking.Due in hydraulic cylinder piston body and hydraulic structure be the linear arrangement in direction along cylinder top to cylinder bottom, reduce the radial dimension of hydraulic parking push rod assembly, guarantee that hydraulic parking push rod assembly is easy for installation.The hydraulic parking push rod assembly of the present invention is used for automotive field.

Description

A kind of hydraulic parking push rod assembly, automatic transmission and automobile
Technical field
The present invention relates to automobile technical field, in particular to a kind of hydraulic parking push rod assembly, automatic transmission and automobile.
Background technique
Automatic transmission is a kind of automotive transmission that can change gear ratio automatically in vehicle travel process.For Guarantee safety of the automobile in taxiing procedures, will be installed a set of halting mechanism, in automatic transmission generally to guarantee automobile It timeless in the least can be parked on certain position even abrupt slope.
Currently, common halting mechanism is hydraulic halting mechanism, including hydraulic parking push rod assembly, parking arm and it is set in defeated Enter the parking gear on axis;The structure of hydraulic parking push rod assembly is as shown in Figure 1, it mainly includes hydraulic cylinder 1 and is located at liquid Parking piston 3 in cylinder pressure 1, parking piston 3 are connected on pull rod 2, and pull rod 2 stretch out hydraulic cylinder one end be arranged with for The parking cam 4 that parking arm is in contact;The through-hole for installing piston lock pin 50 is offered on hydraulic cylinder 1, on parking piston 3 It is provided with locking hole, piston lock pin 50 is by the magnet control being located at outside hydraulic cylinder 1.
When automobile is in parked state, electromagnet no power, piston lock pin 50, which is stuck in locking hole, makes parking living Plug along the axial movement of hydraulic cylinder 1, does not guarantee parking cam 4 and parking arm contact, makes parking gear stop passing by parking arm It is dynamic, to interrupt the power transmission in automatic transmission, guarantee that automobile can be in parked state for a long time;And when automobile will release When parked state, by being powered to electromagnet 6, pushes electromagnet 6 by piston lock pin 50, hydraulic oil is made to push parking piston 3 is mobile to the left side of hydraulic parking push rod assembly as is shown in fig. 1, so that parking cam 4 be made to disengage with parking arm, stays Skiving wheel does not have the compacting of parking arm and transmission shaft is driven to rotate, and automatic transmission is made to be able to carry out power transmission, releases automobile Parked state.
Although above-mentioned hydraulic halting mechanism can be good at realizing the parking function of automobile, due to this hydraulic parking In the hydraulic parking push rod assembly of mechanism, piston lock pin 50, electromagnet 6 and parking piston 3 cannot make same axially mounted Piston lock pin 50, electromagnet 6 and the arrangement dispersion of parking piston 3 are obtained, causes the radial dimension of hydraulic cylinder excessive, is not easy to fill Match.
Summary of the invention
In view of this, the present invention is directed to propose a kind of hydraulic parking push rod assembly is made with reducing the radial dimension of hydraulic cylinder Hydraulic parking push rod assembly is easily installed.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of hydraulic parking push rod assembly, the hydraulic cylinder including offering the first oilhole and the second oilhole, along described hydraulic The cylinder top of cylinder to the hydraulic cylinder cylinder bottom direction, be successively arranged piston body in the hydraulic cylinder, and with the hydraulic cylinder Inner wall sealing hydraulic joint, the piston body be located at can with the hydraulic joint engage and isolated piston rod on, it is described Connector cavity is had in hydraulic joint;Part in the hydraulic cylinder between the cylinder top and the piston body forms first Seal cavity, the first annular seal space body are connected to first oilhole, in the hydraulic cylinder be located at the piston body with it is described Part between hydraulic joint forms the second seal cavity, and second seal cavity is connected to second oilhole, and described the Two seal cavities are connected to the connector cavity;The cylinder top or the cylinder bottom, the piston are stretched out in one end of the piston rod Bar stretches out the cylinder top or one end of the cylinder bottom and is equipped with parking cam;Wherein,
When non-parking, the oil pressure of the first annular seal space body is greater than the total of second seal cavity and the connector cavity Oil pressure, the hydraulic joint engage with the piston rod;When parking, it is close that the oil pressure of the first annular seal space body is less than described second Total oil pressure of cavity and the connector cavity is sealed, the hydraulic joint is separated with the piston rod.
Preferably, the hydraulic joint includes outer lock sleeve and the interior lock sleeve that is located in the outer lock sleeve, described outer The outer wall of lock sleeve and the piston inside wall of cylinder seal;Space between the outer lock sleeve and the interior lock sleeve forms external Head cavity body, nipple cavity is formed with inside the interior lock sleeve, and the nipple cavity and the coupling cavity constitute institute State connector cavity;The first elastic component, one end of first elastic component and the piston body are equipped in second seal cavity Connection, the other end of first elastic component connect with the hydraulic cylinder, and the outer lock sleeve and the interior lock sleeve pass through the The connection of two elastic components, the outer lock sleeve are connect with the cylinder bottom by the third elastic component;
The outer lock sleeve face opposite with the interior lock sleeve is equipped with protrusion, and the interior locking, which is put on, offers locking Via hole, the locking via hole is interior to be equipped with the locking ball that can be moved in the locking via hole, offers energy on the piston rod Enough lock grooves with locking ball cooperation;
When non-parking, the locking ball is pressed in the lock groove by the protrusion;
When parking, the locking ball deviates from the lock groove by the locking via hole.
The locking ball can be assisted to enter and deviate from the lock groove preferably, the two sides of the protrusion are respectively equipped with Secondary surface.
Preferably, the piston rod is equipped with leads with the connection of second seal cavity and the connector cavity respectively Flow chamber.
Preferably, the hydraulic cylinder includes partition, and the partition, which is located in the hydraulic cylinder, is located at the piston body and institute The part between hydraulic joint is stated, the partition is connect with the piston body by first elastic component;It is opened on the partition The inner piston rod via hole passed through equipped with the 4th oilhole and for the piston rod, the 4th oilhole will second seal cavity with The connector cavity connection.
Preferably, the piston rod stretch out the cylinder top one end be equipped with parking cam when, the parking cam with it is described Cylinder top is connected by the 4th elastic component, and the other end of the piston rod is between the piston body and the hydraulic joint.
Preferably, the one end of the piston rod between the piston body and the hydraulic joint is machined with piston rod and falls Angle.
Preferably, the piston rod stretch out the cylinder bottom one end be equipped with parking cam when, the parking cam with it is described One end that piston rod stretches out the cylinder bottom is connected by the 4th elastic component, and the other end of the piston rod is connected to the piston body On.
Compared with the existing technology, hydraulic parking push rod assembly of the present invention has the advantage that
In hydraulic parking push rod assembly provided by the invention, piston body and hydraulic joint are in hydraulic cylinder along the cylinder of hydraulic cylinder The direction for pushing up the cylinder bottom of hydraulic cylinder is set gradually, and the inner wall of hydraulic joint and hydraulic cylinder seals, and first annular seal space body is liquid Part in cylinder pressure between the cylinder top and piston body of hydraulic cylinder, the second seal cavity are to be located at piston body and liquid in hydraulic cylinder Part between crimp head, and be connected to the connector cavity that hydraulic joint has;Therefore, hydraulic parking push rod provided by the invention Assembly can be by limiting total oil pressure of the second seal cavity and connector cavity, and relationship with the oil pressure of first annular seal space body makes Piston body drives piston rod to move between the cylinder top of hydraulic cylinder and the cylinder bottom of hydraulic cylinder.When not needing parking, so that it may logical The oil pressure for crossing control first annular seal space body is greater than total oil pressure of second seal cavity and connector cavity, makes hydraulic joint and work Stopper rod engaging makes automobile so that it is guaranteed that the parking cam for being located at one end that piston rod stretches out cylinder top or cylinder bottom is detached from parking arm It is in non-parked state;And when needing parking, by controlling the oil pressure of first annular seal space body less than the second seal cavity and connector Total oil pressure of cavity, separates hydraulic joint with piston rod, so that it is guaranteed that be located at one end of piston rod stretching cylinder top or cylinder bottom Parking cam and parking arm contact, make automobile be in parked state.
By above-mentioned analysis it is found that hydraulic parking push rod assembly provided by the invention makes piston rod band by hydraulic control There is one end of lock groove to form connector similar with hydraulic quick coupling principle with hydraulic joint;Wherein, piston rod has locking One end of slot is considered as famale connector, and hydraulic joint is considered as famale connector, it may also be said to which hydraulic joint is hydraulic quick coupling Famale connector;When work, by controlling the oil pressure of first annular seal space body and total oil of second seal cavity and connector cavity The size relation of pressure makes piston rod engage or separate with hydraulic joint, realizes the conversion of automobile non-parking and parked state, without The cooperation for needing electromagnet simplifies the structure of hydraulic parking push rod assembly.Moreover, because piston body and hydraulic joint are along hydraulic The cylinder bottom of cylinder top to the hydraulic cylinder of cylinder is arranged in hydraulic cylinder, i.e. piston body and hydraulic joint is on the axis of hydraulic cylinder, is subtracted Small radial dimension of the hydraulic parking push rod assembly in hydraulic cylinder, is integrated into piston body and hydraulic joint in hydraulic cylinder, guarantees Hydraulic parking push rod assembly is easy for installation.
Another object of the present invention is to propose a kind of automatic transmission, to reduce hydraulic parking push rod assembly in hydraulic cylinder Radial dimension, be easily installed hydraulic parking push rod assembly.In order to achieve the above objectives, the technical scheme is that it is real in this way Existing:
A kind of automatic transmission, the automatic transmission are equipped with the hydraulic parking push rod such as above-mentioned technical proposal Assembly.
Compared with the existing technology, automatic transmission of the present invention has following advantage:
The hydraulic parking push rod assembly of the automatic transmission and above-mentioned technical proposal is possessed compared with the existing technology Advantage is identical, and details are not described herein.
Another object of the present invention is to propose a kind of automobile, to reduce hydraulic parking push rod assembly in the radial direction of hydraulic cylinder Size is easily installed hydraulic parking push rod assembly.In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of automobile, the automobile are equipped with the automatic transmission such as above-mentioned technical proposal.
Compared with the existing technology, speed changer of the present invention has the advantage that
Possessed advantage is identical compared with the existing technology with the automobile of above-mentioned technical proposal for the automobile, no longer superfluous herein It states.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of existing hydraulic parking push rod assembly;
Fig. 2 is the first concrete structure schematic diagram of the first hydraulic parking push rod assembly provided in an embodiment of the present invention;
Fig. 3 is the structural schematic diagram of piston rod in Fig. 2;
Fig. 4 is second of concrete structure schematic diagram of the first hydraulic parking push rod assembly provided in an embodiment of the present invention;
Fig. 5 is the structural schematic diagram of hydraulic cylinder in the first hydraulic parking push rod assembly provided in an embodiment of the present invention;
Fig. 6 is the structural schematic diagram of the first hydraulic parking push rod assembly China and foreign countries lock sleeve provided in an embodiment of the present invention;
Fig. 7 is the structural schematic diagram of interior lock sleeve in the first hydraulic parking push rod assembly provided in an embodiment of the present invention;
Fig. 8 be the first hydraulic parking push rod assembly provided in an embodiment of the present invention in hydraulic joint and piston rod non- Relative motion relation figure when parked state is to parked state;
Fig. 9 is that the hydraulic joint and piston rod in the first hydraulic parking push rod assembly provided in an embodiment of the present invention are being stayed Relative motion relation figure when car state is to non-parked state;
Figure 10 is the first concrete structure schematic diagram of second provided in an embodiment of the present invention hydraulic parking push rod assembly;
Figure 11 is second of concrete structure schematic diagram of second provided in an embodiment of the present invention hydraulic parking push rod assembly;
Figure 12 is the structural schematic diagram of hydraulic cylinder in second provided in an embodiment of the present invention hydraulic parking push rod assembly;
Figure 13 is the structural schematic diagram of piston rod in Figure 11;
Description of symbols:
1- hydraulic cylinder, 101- first annular seal space body, the second seal cavity of 102-;
The first oilhole of 11-, the second oilhole of 12-, 13- third oilhole;
The 4th oilhole of 14-, 15- inner piston rod via hole, the outer inner piston rod via hole of 16-;
2- pull rod, 3- parking piston, 30- piston body;
31- piston rod, 310- lock groove, first body of rod of 311-;
Second body of rod of 312-, 313- piston rod chamfering, 4- parking cam;
5- hydraulic joint, 50- piston lock pin, 500- connector cavity;
The outer lock sleeve of 51-, 510- protrusion, 511- coupling cavity;
512- secondary surface, lock sleeve in 52-, 520- locking via hole;
521- nipple cavity, 53- locking ball, 6- electromagnet;
The 4th elastic component of 7-, the first elastic component of 8-, the second elastic component of 91-;
92- third elastic component.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase Mutually combination.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
Fig. 2 and Fig. 4 and Figure 10 and Figure 11 are please referred to, hydraulic parking push rod assembly provided in an embodiment of the present invention includes: The hydraulic cylinder 1 for offering the first oilhole 11 and the second oilhole 12, along the direction of the cylinder bottom on the cylinder top of hydraulic cylinder 1 to hydraulic cylinder, liquid Piston body 30 and the hydraulic joint 5 with the inner wall sealing of hydraulic cylinder 1 are successively arranged in cylinder pressure 1, piston body 30 is located at can be with liquid In the engaging of crimp head 5 and isolated piston rod 31;Connector cavity 500 is had in hydraulic joint 5;In hydraulic cylinder 1 be located at cylinder top and Part between piston body 30 forms first annular seal space body 101, and first annular seal space body 101 is connected to the first oilhole 11, hydraulic cylinder 1 In part between piston body 30 and hydraulic joint 5 form the second seal cavity 102, the second seal cavity 102 and second Oilhole 12 is connected to, and the second seal cavity 102 is connected to connector cavity 500;Cylinder top or cylinder bottom, piston are stretched out in one end of piston rod 31 Bar 31 stretches out cylinder top or one end of cylinder bottom and is equipped with parking cam 4;Wherein,
When non-parking, the oil pressure of first annular seal space body 101 is greater than total oil of the second seal cavity 102 and connector cavity 500 Pressure, hydraulic joint 5 engage with piston rod 31;When parking, the oil pressure of first annular seal space body 101 is less than 102 He of the second seal cavity Total oil pressure of connector cavity 500, hydraulic joint 5 are separated with piston rod 31.
When running car, when not needing parking, it is passed through hydraulic oil into first annular seal space body 101, thus control first The oil pressure of seal cavity 101 is greater than total oil pressure of the second seal cavity 102 and connector cavity 500, makes piston body 30 with piston Bar 31 is mobile to 5 direction of hydraulic joint, makes the parking cam 4 of the one end for being located at the stretching cylinder top of piston rod 31 or cylinder bottom and stays The separation of vehicle arm, when hydraulic joint 5 engages with piston rod 31, can be achieved with the locking of piston rod 31.When needing parking, to It is passed through hydraulic oil in two seal cavities 102, so that hydraulic oil is entered connector cavity 500 from the second seal cavity 102, to control The oil pressure of first annular seal space body 101 drives piston body 30 less than total oil pressure of the second seal cavity 102 and connector cavity 500 Hydraulic stem 31 is mobile to cylinder top direction, separates hydraulic joint 5 with piston rod 31, unlocks piston rod 31, piston body 30 Under the promotion of the hydraulic oil in the second seal cavity 102 and connector cavity 500, piston rod 31 is driven to move to cylinder top direction It is dynamic, to make the parking cam 4 and parking arm contact that are located at one end that piston rod stretches out cylinder top or cylinder bottom, realize parking.
The parking state of the hydraulic parking push rod assembly provided through the foregoing embodiment and the mutual of non-parked state cross ferryman Make process description it is found that piston body 30 and hydraulic joint 5 in hydraulic cylinder 1 along the cylinder bottom on the cylinder top of hydraulic cylinder 1 to hydraulic cylinder 1 Direction is set gradually, and the inner wall of hydraulic joint 5 and hydraulic cylinder 1 seals, and first annular seal space body 101 is to be located at liquid in hydraulic cylinder 1 Part between the cylinder top and piston body 30 of cylinder pressure 1, the second seal cavity 102 be in hydraulic cylinder 1 be located at piston body 30 with it is hydraulic Part between connector 5, and be connected to the connector cavity 500 that hydraulic joint 5 has;Therefore, provided in this embodiment hydraulic to stay Vehicle push rod assembly can be by total oil pressure of the second seal cavity of restriction 102 and connector cavity 500, with first annular seal space body 101 Oil pressure relationship, make piston body 30 drive piston rod 31 moved between the cylinder top of hydraulic cylinder 1 and the cylinder bottom of hydraulic cylinder 1.When Should not parking when, so that it may by control first annular seal space body 101 oil pressure be greater than the second seal cavity 102 and connector cavity 500 total oil pressure, engages hydraulic joint 5 with piston rod 31, realizes piston rod locking, so that it is guaranteed that being located at the stretching of piston rod 1 The parking cam 4 of cylinder top or one end of cylinder bottom and parking arm are detached from, and automobile is made to be in non-parked state;And when needing parking, lead to The oil pressure of control first annular seal space body 101 is crossed less than total oil pressure of the second seal cavity 102 and connector cavity 500, makes hydraulic connect First 5 separate with piston rod 31, unlock piston rod, so that it is guaranteed that being located at the parking that piston rod 31 stretches out one end of cylinder top or cylinder bottom Cam 4 and parking arm contact, make automobile be in parked state.
And piston is made it is found that hydraulic parking push rod assembly provided in this embodiment is by hydraulic control according to above-mentioned analysis The one end of bar 31 with lock groove 310 forms connector similar with hydraulic quick coupling principle with hydraulic joint 5;Wherein, piston Bar is considered as famale connector with one end of lock groove, and hydraulic joint is considered as famale connector, it may also be said to which hydraulic joint is liquid Press the famale connector of quick coupling;When work, by controlling oil pressure and the second seal cavity 102 of first annular seal space body 101 and connecing The size relation of total oil pressure of head cavity body 500 makes piston rod 31 and hydraulic joint 5 engage or separate, realize the non-parking of automobile and The conversion of parked state simplifies the structure of hydraulic parking push rod assembly without the cooperation of electromagnet.Moreover, because living Cock body 30 and hydraulic joint 5 are arranged in hydraulic cylinder 1 along the cylinder bottom of cylinder top to the hydraulic cylinder 1 of hydraulic cylinder 1, i.e. piston body 30 and liquid Crimp head 5 is in the axial direction of hydraulic cylinder 1, is reduced hydraulic parking push rod assembly in the radial dimension of hydraulic cylinder 1, is made piston body It is integrated into hydraulic cylinder with hydraulic joint, so that hydraulic parking push rod assembly is easy for installation.
It should be noted that when dotted arrow is parking in Fig. 2, Fig. 4, Figure 10 and Figure 11,101 He of first annular seal space body The flow direction of hydraulic oil in second seal cavity 102, when solid arrow is non-parking, first annular seal space body 101 and the second seal chamber The flow direction of hydraulic oil in body 102;Moreover, because the inner wall of hydraulic joint 5 and hydraulic cylinder 1 seals, the joint cavity in hydraulic joint 5 Body 500 is connected to the second seal cavity 102 again, therefore, first annular seal space body 101, and by the second seal cavity 102 and connector The locking cavity that cavity 500 is formed is variable seal cavity.
In addition, though the hydraulic oil in the second seal cavity 102 and lock chamber 500 can after the unlock of piston rod 31 It is mobile to push piston body 30 to drive 31 cylinder top direction of piston rod, so as to be located at piston rod 31 stretches out cylinder top or cylinder bottom one Parking cam 4 on end can realize parking with parking arm contact;But hydraulic oil pushes the effect of piston body 30 limited, is Enable piston body 30 to drive piston rod 31 mobile to cylinder top direction as early as possible, so as to make parking cam 4 as early as possible with parking Arm contact realizes quick parking;It limits and is equipped with the first elastic component 8 in the second seal cavity 5 in above-described embodiment;Wherein, One end of one elastic component 8 is connect with piston body 31, and the other end is connect with hydraulic cylinder 1.
And in order to more preferably install the first elastic component 8, in hydraulic cylinder 1 between piston body 30 and hydraulic joint 5 Part be equipped with partition, partition and piston body 30 pass through the first elastic component 8 and connect, and offers on partition and passes through for piston rod 31 Inner piston rod via hole 15.Since partition and piston body pass through 8 elastic connection of the first elastic component, after piston rod 31 unlocks, first The elastic force of elastic component 8 can push piston body 30 to drive piston rod 31 mobile to cylinder top direction.Moreover, in order to make second Seal cavity 102 and connector cavity 500 realize connection, in partition other than opening up inner piston rod via hole 15, have also opened up the Four oilholes 14 make hydraulic oil be passed through the to be connected to the second seal cavity 102 with connector cavity 500 by the 4th oilhole 14 It is able to enter when two seal cavities 102 in connector cavity 500.
Please continue to refer to Fig. 2 and Fig. 4 and Figure 10 and Figure 11, the hydraulic joint 5 in above-described embodiment is equivalent to hydraulic fast The male contact of quick coupling, specifically includes the outer interior lock sleeve 52 lock sleeve 51 and be located in outer lock sleeve 1, outer lock sleeve 51 it is outer The inner wall of wall and hydraulic cylinder 1 is tightly connected;Space between outer lock sleeve 51 and interior lock sleeve 52 forms coupling cavity 511, Nipple cavity 521 is formed inside interior lock sleeve 52, nipple cavity 521 and coupling cavity 511 constitute connector cavity 500; The first elastic component 8 is equipped in second seal cavity 102, one end of the first elastic component 8 is connect with piston body 30, the first elastic component 8 The other end connect with hydraulic cylinder 1, outer lock sleeve 51 and interior lock sleeve 52 connects by the second elastic component 91, outer lock sleeve 51 and Cylinder bottom is connected by the second elastic component 92;Referring to Fig. 6, outer lock sleeve 51 face opposite with interior lock sleeve 52 is equipped with protrusion 510, referring to Fig. 7, offering locking via hole 520 on interior lock sleeve 52, being equipped in locking via hole 520 can be along locking via hole The locking ball 53 of 520 axial movement offers the lock groove 310 that can cooperate with locking ball 53 on piston rod 31, please refer to Fig. 8, when non-parking, locking ball 53 is pressed in lock groove 310 by protrusion 510;Referring to Fig. 9, locking ball 53 passes through lock when parking Only via hole 520 deviates from lock groove 310.
One end that either cylinder bottom is still stretched out on the stretching of piston rod 31 cylinder top in above-described embodiment is equipped with parking cam 4, Working principle is as shown in Figure 8 and Figure 9.Below to please refer to Fig. 8 and Fig. 9, to hydraulic parking push rod provided by the above embodiment The working principle of assembly is described.
For automobile in non-parking, locking ball 53 is in lock position, the i.e. diameter of locking ball 53 and protrusion 510 in hydraulic cylinder 1 Upward position is corresponding;Illustrate in other words, the face that locking ball 53 is pressed in lock groove 310 (is facilitated title to be described below by protrusion 510 Make raised top surface) it is contacted with locking ball 53;When needing parking, referring to Fig. 8, using the second oilhole 12 to the second seal cavity It is passed through hydraulic oil in 102, total oil pressure of the second seal cavity 102 and connector cavity 500 is made to be greater than the oil of first annular seal space body 101 Pressure, when due to non-parking, piston rod 31 is locked, and therefore, enters connector cavity by the hydraulic oil that the second seal cavity 102 is passed through After 500, outer lock sleeve 51 is driven to overcome the elastic force of third elastic component 92, it is mobile to cylinder bottom direction;And when due to non-parking Locking ball 53 is pressed in lock groove 310 by protrusion 510 (see Fig. 8 A), and interior lock sleeve 52 is irremovable at this time;Therefore, outside When lock sleeve 51 is mobile to cylinder top direction, the protrusion 510 on outer lock sleeve 51 can be with locking via hole 520 on interior lock sleeve 52 In the relative position of locking ball 53 change, to make protrusion 510 that can not continue locking ball 53 being pressed into lock groove 310 In, such piston rod 310 would not be locked and can move, and locking ball 53 can then be moved to protrusion 510 close to piston body 30 Side (please refers to Fig. 8 B).In addition, since total oil pressure of the second seal cavity 102 and connector cavity 500 is greater than first annular seal space The oil pressure of body 101, and the part for being located at piston body 30 and outer lock sleeve 51 in hydraulic cylinder 1 passes through parking spring 8 with piston body 30 Elastic connection, therefore, piston body 30 is in total oil pressure of the first elastic component 8 and the second seal cavity 102 and connector cavity 500 It under promotion, is able to drive piston rod 31 and is quickly moved to cylinder top direction, so that piston rod 31 be made to stretch out cylinder top or cylinder bottom Parking cam 4 and parking arm contact on one end, realize parking.
Moreover, during piston body 30 is able to drive piston rod 31 and moves to cylinder top direction, due to second close The total volume of envelope cavity 102 and connector cavity 500 constantly increases, and third elastic component 92 is by itself because replying caused by compression Pushing dynamic outer lock sleeve 51 drives locking ball 53 to be returned to lock position.
When not needing parking, referring to Fig. 9, it is passed through hydraulic oil into first annular seal space body 101 using the first oilhole 11, Oil pressure is set to be greater than total oil pressure of the second seal cavity 102 and connector cavity 500, as the oil pressure of first annular seal space body 101 is more next Bigger, piston body 31 is mobile to 5 direction of hydraulic joint (could also say that cylinder bottom direction) with piston rod 31, makes to live The parking cam 4 that the stretching cylinder top of stopper rod 31 or one end of cylinder bottom are equipped with is separated with parking arm;When piston rod 31 is moved to locking position When setting, locking ball 53 corresponding with raised position is touched, piston rod 31 can push locking ball 53 to drive 52 grams of interior lock sleeve The elastic force for taking the first elastic component 91, mobile to cylinder bottom direction, such locking ball 53 just pushes cylinder bottom place to by piston rod 31 Direction is mobile (see Fig. 9 B);And since locking ball 53 can push locking in piston rod 31 along the axial movement of locking via hole 520 When ball 53 is staggered to the movement of cylinder bottom direction, and the position of locking ball 53 and protrusion 510, do not have on the inner wall of outer lock sleeve 51 Protrusion 510, locking ball 53 can move along outside 52 direction of lock sleeve of locking via hole 520;When the complete position of locking ball 53 When locking via hole 520, although piston rod 31 is still mobile to cylinder bottom direction, it cannot drive locking ball 53 and internal lock Only set 52 is mobile to cylinder bottom direction.
And since piston rod 31 no longer drives interior lock sleeve 52 mobile to cylinder bottom direction;Therefore, the second elastic component 91 Using itself because compression caused by restoring force can push in lock sleeve 52 drive locking ball 53 to cylinder top direction move (could also say that protrusion 510 and be located at the farther away side movement in cylinder top), so that locking ball is returned to lock position;In locking ball When being moved to raised 510 side farther away apart from cylinder top, is stopped and can not be advanced by the side of protrusion 310, but due to internal lock Only set 52 drives locking ball 53 to be returned to lock position not yet;Therefore, locking ball 53 can slide into work along the side of protrusion 310 In the lock groove 310 opened up on stopper rod 31, interior lock sleeve 52 drives locking ball 53 that can be returned to lock position at this time, i.e., convex Play top surface position corresponding with 53 position of locking ball (see Fig. 9 A).
Since locking ball is returned to lock position under the drive of interior lock sleeve 52, interior lock sleeve 53 will not drive locking again Ball 53 is mobile to cylinder top direction, to make locking ball lock piston bar 31, after piston rod 31 is locked up, is just able to maintain non-stay Car state.
It should be noted that the bullet that piston rod 31 pushes locking ball 53 that interior lock sleeve 52 is driven to overcome the first elastic component 91 Power, when mobile to cylinder bottom direction, the effect of third elastic component 92 of the outer lock sleeve 51 between outer lock sleeve 51 and cylinder bottom Under remain stationary it is motionless.Moreover, piston rod 31 is in the bullet for pushing locking ball 53 that interior lock sleeve 52 is driven to overcome the first elastic component 91 Power can apply a upward power to locking ball 53, keep locking ball faster during the movement of cylinder bottom direction Outside 51 direction of lock sleeve is mobile.
It is worth noting that, by the working principle description of above-mentioned hydraulic parking push rod assembly as can be seen that in non-parking To when parked state transition, locking ball 53 enters in lock groove 310 state, and in parked state to when non-parked state transition, Locking ball is deviate from from lock groove 310, the side of the protrusion 510 on outer lock sleeve 51;As it can be seen that non-parked state with stay In the mutual transient process of car state, locking ball 53 is variable in the position radially of hydraulic cylinder 1.
Moreover, in hydraulic parking push rod assembly provided by the above embodiment piston rod 31 locking degree, tune can be passed through The quantity of locking ball 53 is saved to limit.Certainly be with lock groove 310 due to locking ball 53 it is corresponding, locking ball quantity adjust Afterwards, the quantity of lock groove 310 is also required to be adjusted correspondingly.It preferably, can be by locking ball 53 along the week of interior lock sleeve 52 To being arranged on interior lock sleeve 52, and corresponding position necessarily opens up locking via hole 520 corresponding with locking ball 520.
In order to improve parked state to the speed of non-parked state transition, can set about in terms of following two to above-mentioned reality The hydraulic parking push rod assembly for applying example offer optimizes.
On the one hand, the hole depth of the locking via hole 520 in above-described embodiment is less than the diameter of locking ball 53, in this way in parking shape It, could be with locking ball 53 when state stops 53 position of ball to when non-parked state transition, piston rod 31 runs to interior locking lock set Contact, otherwise locking ball 53 can be fully located in locking via hole 520, and piston rod 31 can not be contacted with locking ball 53, thus It cannot achieve non-parking.Moreover, the sum of the hole depth of locking via hole 520 and the height of protrusion 510 are more than or equal to the straight of locking ball 53 Diameter, in this way in parked state to when non-parked state transition, after locking ball 53 applies a upward power by piston rod 31, locking Ball 53 is moved along outside 51 direction of lock sleeve of locking via hole 520, and ability locking ball 53 is fully located at locking via hole 520, is protected Although it is still mobile to cylinder bottom direction to demonstrate,prove piston rod 31, it cannot drive locking ball 53 and interior lock sleeve 52 to cylinder bottom institute It is mobile in direction, so that the second elastic component 91 can make interior lock sleeve 53 drive lock using itself because of restoring force caused by compression Only ball 53 is mobile to 30 direction of piston body, to realize parked state smoothly transitting to non-parked state.
On the other hand, piston rod 31 and locking ball 53 touch at first place radius it is smaller, and piston rod 31 is equipped with lock Only the position radius of slot 310 is larger, and the different part of the two different radiis is (i.e. above by intermediate incline on piston rod 31 Secondary surface 512) connection;In this way after locking ball 53 and intermediate incline contact, intermediate incline can apply one to locking ball 53 A power, this power can be divided into cylinder bottom direction power and make locking ball 53 along outside 51 institute of lock sleeve of locking via hole 520 In the mobile power in direction, thus improve parked state to non-parked state the speed to smoothly transit.
In addition, in order to avoid parked state to non-parked state transition and non-parked state are to when parked state transition To abrasion caused by locking ball 53;Referring to Fig. 6, being respectively set in the two sides of protrusion 510 can assist locking ball 53 to enter With the secondary surface 512 of abjection lock groove 310.Or optimized by the structure to protrusion 510, make protrusion itself that there is auxiliary The function in face 512.For example, protrusion 510 in above-described embodiment face opposite with the inner wall of outer lock sleeve 51 is defined as raised bottom Face, the face that locking ball 53 is pressed into lock groove 310 is defined as raised top surface by protrusion 510, and the area of raised top surface is less than convex Play the area of bottom surface;Since locking ball 53 is pressed into the face in lock groove 310 by raised top surface, the relatively raised bottom surface of area is opposite Smaller, therefore, this structure of protrusion 510 can be improved the contact surface unit area that locking ball 53 is contacted with raised top surface and be held The pressure received, so that preferably locking ball 53 is pressed onto lock groove 310.
In addition, raised top surface can be connected with raised bottom surface by inclined-plane lock sleeve inclined-plane 512, one thus will form The face on similar slope enables locking ball 53 easily to enter or deviate from lock groove 310 along slope, makes locking ball 53 along lock sleeve Inclined-plane 512 rolled to out of lock groove 310 protrusion 510 side, or from protrusion 510 side enter lock groove 310 during, It avoids suffering excessive wear.Moreover, the inner wall of lock groove 310 may be cambered surface, the notch area of lock groove 310 is larger, Slot bottom area is smaller, to form the smooth bowl structure that is similar to be open, passes in and out lock groove 310 in locking ball 53 to reduce When, the inner wall of lock groove 310 further decreases in parked state and non-parked state alternation procedure the resistance of locking ball 310 It is worn to caused by locking ball 53.
It should be noted that in order to enable hydraulic oil more quickly to enter joint cavity by the second seal cavity 102 In body 500, realizes the quick parking of benefit, the company with the second seal cavity 102 and connector cavity 500 respectively is equipped on piston rod 31 Logical diversion cavity.In this way when being passed through hydraulic oil to the second cavity using the second oilhole 12, hydraulic oil can also utilize piston rod 31 diversion cavity enters in connector cavity 500, makes hydraulic oil more quickly full of the second seal cavity 102 and connector cavity 500。
It is worth noting that, either parking cam 4 is to be located in hydraulic parking push rod assembly provided by the above embodiment Piston rod 31 stretches out one end of cylinder top or cylinder bottom, and working principle is all the same.But outer lock sleeve 51, interior lock sleeve 52 and The shape of piston rod 31 is necessarily different.In order to which the apparent parking cam 4 illustrated on piston rod 31 is located at piston rod The difference of 31 hydraulic parking push rod assembly structures provided by the above embodiment when stretching out cylinder tops or stretching out one end of cylinder bottom, below will The hydraulic parking push rod assembly of above-described embodiment is divided into two kinds of situations in conjunction with attached drawing to be described in detail.
The first situation: please referring to Fig. 2 and Fig. 4, when one end that piston rod 31 stretches out cylinder top is equipped with parking cam 4, parking Cam 4 is connect with cylinder top by the 4th elastic component 7, and the other end of piston rod 31 is between piston body 30 and hydraulic joint 1.This In the case of kind, referring to Fig. 5, the cylinder bottom of hydraulic cylinder 1 offers the outer piston bar via hole 16 that piston rod 31 can be made to be pierced by cylinder top; Referring to Fig. 6, outer lock sleeve 51 is a cavity body structure with opening;Referring to Fig. 7, offering third on interior lock sleeve 52 Oilhole 13 just can guarantee that nipple cavity 521 is connected to coupling cavity 511 in this way.
The structure of piston rod 31 in above-described embodiment also as shown in figures 2 or 4, specifically includes and is connected to piston body 30 1 First body of rod 311 in face, and it is connected to second body of rod 312 of piston body another side, second body of rod 312 passes through outer piston bar mistake Cylinder top is stretched out in hole 16, and parking cam 4 is located at one end that second body of rod 312 stretches out cylinder top;Locking is opened up on first body of rod 311 Slot 310, first body of rod 311 stretch to interior 52 one end of lock sleeve and are machined with piston rod chamfering 313.
In transition of the parked state to non-parked state, first body of rod 311 is after touching locking ball, first body of rod The 311 piston rod chamferings 313 for stretching to interior 52 one end of lock sleeve are contacted with locking ball, apply a power, this power to locking ball 53 Can be divided into cylinder bottom direction power and move locking ball 53 along outside 51 direction of lock sleeve of locking via hole 520 Power.Therefore, parked state can be accelerated to non-by stretching to interior 52 one end machining piston bar chamfering 313 of lock sleeve in first body of rod 311 The transition of parked state.
It, can also be by lock groove 310 in first body of rod in order to further speed up the transition of parked state to non-parked state On 311 position setting it is closer from piston rod chamfering 313, in this way in locking ball 53 along the outside lock sleeve of locking via hole 520 51 directions, when being moved to locking ball 53 and being fully located at the state of locking via hole 520, although since piston rod 31 is still to cylinder Bottom direction is mobile, and piston rod 31 cannot drive locking ball 53 and interior lock sleeve 52 mobile to cylinder bottom direction, therefore, Lock groove 310 can be engaged shortest apart from interior with locking ball 53, improve parked state to non-parking shape to reach The purpose of state transition speed.
It should be noted that referring to Fig. 3, piston rod 31 can be solid construction as shown in Figure 2, or as schemed Class hollow structure shown in 4.When piston rod 31 is hollow structure, the hollow parts of piston rod 31 its be equivalent to above-described embodiment The diversion cavity mentioned;Specific to piston rod 31 shown in Fig. 3 be class hollow structure when, since locking is arranged on first body of rod 311 Slot 310, therefore, diversion cavity are provided on first body of rod 311, to realize that diversion cavity is connected to the second seal cavity 102 and joint cavity Body 500.
Second situation: Figure 10 and Figure 11 are please referred to and is stayed when one end that piston rod 31 stretches out cylinder bottom is equipped with parking cam 4 Vehicle cam 4 is connect with one end that piston rod 31 stretches out cylinder bottom by the 4th elastic component 7, and the other end of piston rod 31 is connected to piston On body 30.In this case, Figure 13 is please referred to, the cylinder bottom of hydraulic cylinder 1 is equipped with outer piston bar via hole 16, and piston rod 31 must be worn The outer piston bar via hole 16 of interior lock sleeve 52 and outer lock sleeve 51 from cylinder bottom is crossed to stretch out.Though and the specific structure of piston rod 31 It still include so first body of rod 311 and second body of rod 312, but one end of first body of rod 311 is connected on piston body 30, the other end It is connect with one end of second body of rod 312, the other end of second body of rod 312 passes through interior lock sleeve 52 and outer lock sleeve 51 from cylinder bottom Outer piston bar via hole 16 stretch out, parking cam 4 is located at one end that second body of rod 312 stretches out cylinder bottom, opens up on first body of rod 311 There is lock groove 310.
In addition, passing through the radius of first body of rod 311 of restriction to improve parked state to the speed of non-parked state transition Greater than second body of rod 312, and first body of rod 311 and second body of rod have a transitional inclined-plane, the principle on the inclined-plane such as the first Situation is the same, can be improved parked state to non-parked state transition speed.
It should be noted that piston rod 31 can be solid knot shown in class hollow structure or Figure 11 as shown in Figure 10 Structure;And when the hollow mechanism of the use of piston rod 31 class as shown in Figure 10, the hollow parts in piston rod 31 are equivalent to above-mentioned reality Apply the diversion cavity that example is mentioned;Specific to piston rod 31 shown in Figure 13 be class hollow structure when, due to being opened up on first body of rod 311 Lock groove 310, therefore, diversion cavity are opened on first body of rod 311 of piston rod 31, so that first body of rod 311 moves to interior locking When covering 52, hydraulic oil is poured by diversion cavity to the nipple cavity 521 in interior lock sleeve 52.
It is worth noting that, in above-mentioned two situations, parking cam 4 is either connect with cylinder top by the 4th elastic component 7, Or the one end for stretching out cylinder bottom with piston body is connect by the 4th elastic component 7, is from amechanical angle, so that parking is convex Wheel 4 can give 4 applied force of parking cam when with parking arm contact, guarantee that parking cam 4 is kept in contact with parking arm, make to stay Vehicle cam 4 can be pressed by parking arm to parking gear, to guarantee that parking gear is not able to rotate, maintain parked state.
In addition, the first elastic component 8, the second elastic component 91, third elastic component 92, the 4th elastic component in above-described embodiment Range of choice is wider, can be common spring, be also possible to other elastic components that can be realized, this will not be repeated here.
The embodiment of the invention also provides a kind of automatic transmission, which is equipped with as above-mentioned technical proposal mentions The hydraulic parking push rod assembly arrived.
Compared with the existing technology, automatic transmission provided in an embodiment of the present invention has following advantage:
The automatic transmission is had compared with the existing technology with the hydraulic parking push rod assembly that above-mentioned technical proposal is mentioned Advantage it is identical, details are not described herein.
The embodiment of the invention also provides a kind of automobile, automobile is equipped with the hydraulic parking mentioned such as above-mentioned technical proposal and pushes away Bar assembly.
Compared with the existing technology, automobile provided in an embodiment of the present invention has the advantage that
The hydraulic parking push rod assembly that the automobile and above-mentioned technical proposal are mentioned compared with the existing technology possessed by advantage Identical, details are not described herein.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.

Claims (10)

1. a kind of hydraulic parking push rod assembly, which is characterized in that including offering the first oilhole (11) and the second oilhole (12) Hydraulic cylinder (1), along the direction of the cylinder bottom on the cylinder top of the hydraulic cylinder (1) to the hydraulic cylinder (1), in the hydraulic cylinder (1) according to The secondary hydraulic joint (5) being tightly connected equipped with piston body (30) and with the inner wall of the hydraulic cylinder (1), the piston body (30) set Connector cavity can be being had in the hydraulic joint (5) on the hydraulic joint (5) engaging and isolated piston rod (31) (500);Part in the hydraulic cylinder (1) between the cylinder top and the piston body (30) forms first annular seal space body (101), the first annular seal space body (101) is connected to first oilhole (11), and the piston is located in the hydraulic cylinder (1) Part between body (30) and the hydraulic joint (5) forms the second seal cavity (102), second seal cavity (102) It is connected to second oilhole (12), second seal cavity (102) is connected to the connector cavity (500);The piston Bar (31) stretches out the cylinder top or one end of the cylinder bottom and is equipped with parking cam (4);Wherein,
The hydraulic joint (5) includes outer lock sleeve (51) and the interior lock sleeve (52) that is located in the outer lock sleeve (51), institute The inner wall of the outer wall and the hydraulic cylinder (1) of stating outer lock sleeve (51) seals;The outer lock sleeve (51) and the interior lock sleeve (52) space between forms coupling cavity (511), is formed with nipple cavity (521) inside the interior lock sleeve (52), The nipple cavity (521) and the coupling cavity (511) constitute the connector cavity (500);
The outer lock sleeve (51) and the opposite face of the interior lock sleeve (52) are equipped with raised (510), the interior lock sleeve (52) it is offered on locking via hole (520), being equipped in the locking via hole (520) can move in the locking via hole (520) Dynamic locking ball (53) offers the lock groove (310) that can cooperate with the locking ball (53) on the piston rod (31);
When non-parking, the oil pressure of the first annular seal space body (101) is greater than second seal cavity (102) and the joint cavity Total oil pressure of body (500), the hydraulic joint (5) engage with the piston rod (31), and the locking ball (53) is by the protrusion (510) it is pressed in the lock groove (310);When parking, the oil pressure of the first annular seal space body (101) is less than second sealing Total oil pressure of cavity (102) and the connector cavity (500), the hydraulic joint (5) separates with the piston rod (31), described Locking ball (53) deviates from the lock groove (310) by the locking via hole (520).
2. hydraulic parking push rod assembly according to claim 1, which is characterized in that in second seal cavity (102) Equipped with the first elastic component (8), one end of first elastic component (8) is connect with the piston body (30), first elastic component (8) the other end is connect with the hydraulic cylinder (1), and the outer lock sleeve (51) and the interior lock sleeve (52) pass through the second elasticity Part (91) connection, the outer lock sleeve (51) are connect with the cylinder bottom by third elastic component (92).
3. hydraulic parking push rod assembly according to claim 2, which is characterized in that the two sides difference of the protrusion (510) Equipped with the secondary surface (512) that the locking ball (53) can be assisted to enter and deviate from the lock groove (310).
4. hydraulic parking push rod assembly according to claim 1, which is characterized in that the piston rod (31) is equipped with difference With the diversion cavity of the connection of second seal cavity (102) and the connector cavity (500).
5. hydraulic parking push rod assembly according to claim 1, which is characterized in that the hydraulic cylinder (1) includes partition, institute State partition and be located at part in the hydraulic cylinder (1) between the piston body (30) and the hydraulic joint (5), it is described every Plate is connect with the piston body (30) by the first elastic component (8);It is offered on the partition described in the 4th oilhole (14) and confession The inner piston rod via hole (15) that piston rod (31) passes through, the 4th oilhole (14) is by second seal cavity (102) and institute State connector cavity (500) connection.
6. hydraulic parking push rod assembly according to any one of claims 1 to 5, which is characterized in that the piston rod (31) when stretching out the one end on the cylinder top equipped with parking cam (4), the parking cam (4) and the cylinder top pass through the 4th elasticity Part (7) connection, the other end of the piston rod (31) is between the piston body (30) and the hydraulic joint (1).
7. hydraulic parking push rod assembly according to claim 6, which is characterized in that the piston rod (31) is located at the work One end between cock body (30) and the hydraulic joint (1) is machined with piston rod chamfering (313).
8. hydraulic parking push rod assembly according to any one of claims 1 to 5, which is characterized in that the piston rod (31) when stretching out one end of the cylinder bottom equipped with parking cam (4), institute is stretched out in the parking cam (4) and the piston rod (31) The one end for stating cylinder bottom is connected by the 4th elastic component (7), and the other end of the piston rod (31) is connected to the piston body (30) On.
9. a kind of automatic transmission, which is characterized in that the automatic transmission is equipped with as described in any one of claim 1-8 Hydraulic parking push rod assembly.
10. a kind of automobile, which is characterized in that the automobile is equipped with automatic transmission as claimed in claim 9.
CN201510725857.4A 2015-10-30 2015-10-30 A kind of hydraulic parking push rod assembly, automatic transmission and automobile Active CN106641242B (en)

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CN110360316A (en) * 2018-04-11 2019-10-22 上海汽车集团股份有限公司 A kind of gearbox and its automatic parking executive device
DE102018123253A1 (en) * 2018-09-21 2020-03-26 Schaeffler Technologies AG & Co. KG Parking lock actuators
DE102019111240A1 (en) * 2019-04-30 2020-11-05 Svm Schultz Verwaltungs-Gmbh & Co. Kg Locking unit and procedure
CN110107686B9 (en) * 2019-05-30 2020-11-24 杰锋汽车动力系统股份有限公司 Gearbox parking locking mechanism

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DE10245369A1 (en) * 2002-09-27 2004-04-15 Zf Friedrichshafen Ag Blocking system for motor vehicle automatic gearboxes has a spring-loaded piston and locking rod which is released by hydraulically pressurizing the piston by a pump
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CN201507638U (en) * 2009-09-15 2010-06-16 上海华普汽车有限公司 Manipulation device of hybrid gear box parking locking mechanism
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