CN110469668A - For activating the parking lock module of the parking lock in motor vehicles - Google Patents

Abstract

A kind of parking lock module (10) has shell (30), piston (40) are accommodated in shell (30), piston (40) is operably connected to piston rod (42) and is pre-loaded to latched position by piston spring (44) along locking direction (S), wherein the piston can be fixed relative to shell (30) by stop device (46).In addition, the piston can bear pressure load along the unlocking direction (E) opposite with locking direction by means of pressure chamber (48), with when stop device is released in the unlocked position opposite with piston spring power.Actuating element (26) is arranged on piston rod with axially-displaceable flowing mode, the actuating element abuts against the preloading of the retainer (52) on piston rod relative to piston rod by piston rod spring (50) on locking direction, and the actuating element can be moved to unlocked position with piston and be moved on unlocking direction by retainer.For the separation of the pressure of piston rod and piston, piston spring is bonded on piston by thrust piece (62), and thrust piece can be moved on the unlocking direction opposite with piston spring power by means of piston rod relative to piston.

Description

For activating the parking lock module of the parking lock in motor vehicles

Technical field

The present invention relates to a kind of parkings as described in the preamble for activating in motor vehicles such as Patent right requirement 1 The parking lock module of lock.Particularly, the present invention relates to a kind of parking lock modules, for example are widely used in tool in the automotive industry recently There are the motor vehicles of hybrid gearbox and with the modern speed changer (auto-manual speed changer) from dynamic characteristic.

Background technique

Parking lock is needed, especially when the self-locking action of driver (engine) cannot be used for keeping motor vehicles static When.Therefore, the locking to power train is realized generally by means of parking lockwheel, which is rotatably jointly arranged in On the output shaft of speed changer and have tooth and the parking lock pawl by means of being pivotably mounted on parallel axes can be with The mode of shape cooperation is locked on tooth, and wherein parking lock pawl must be pivoted against the power of reset spring, which will Parking lock pawl far from parking lockwheel is pre-loaded to unlocked position.

For this purpose, other than the parking lock actuator of electric actuation, staying for electric hydaulic or hydraulic actuation can also be used Lock actuator is used to generate linear movement, by the linear movement, actuating element (such as with cam or the shape of Tapered Cup Formula) it may abut the movement of parking lock pawl, so that the latter pivots.In order to ensure parking lock prevents motor vehicles from rolling, even if Parking lock pawl abuts against the tooth of parking lockwheel without in form-fit fashion with indented joint in actuation process, can also be with In actuating element be arranged energy accumulator (propelling spring), motor vehicles roll in the case where, the energy accumulator via Actuating element promotes park lock pawl, so that the indented joint of the parking lock pawl and parking lockwheel.Also it is often necessary to really It protects actuating element to be stopped in the case where no application energy (electric current or pressure), actuating element is at it relative to parking lock spine The corresponding actuated position of pawl, holding have been pivoted into the park lock pawl engaged with parking lockwheel, or release parking lock spine Pawl, and can promptly be activated, the engagement of parking lock is allowed in the case of actuator failure.

In the prior art, there is no to be integrated in the parking lock module for activating the parking lock in motor vehicles Mode realizes the suggestion of these functions.Parking lock module as a kind of is for example disclosed by document DE102015008709A1, Form the preamble of Patent right requirement 1.According to the prior art, parking lock module has pressure room housing, wherein accommodating There is component part of the piston element as actuating mechanism.The actuating component of shift rod type is hinged on piston element.It can be along The piston element of the displacement axis longitudinal movement of pressure room housing is along park lock direction of engagement by means of piston spring with spring Power is pre-loaded to latched position, wherein the piston element can be selectively solid relative to pressure room housing by brake unit It is fixed.In addition, piston element can be de- in the parking lock opposite with parking lock direction of engagement by the hydraulic pressure chamber in pressure room housing From bearing pressure load on direction, with when discharging brake unit in the unlocked position opposite with the spring force of piston spring, In the unlocked position, piston element can selectively be fixed further through brake unit relative to pressure room housing.

Here, actuating Tapered Cup is axially displaceably arranged on gear lever, specifically in it far from piston element On end, the actuating Tapered Cup by spring element along parking lock direction of engagement relative to gear lever preload at abut against setting Retainer on gear lever.In the case where piston element is moved to unlocked position, actuating Tapered Cup therefore can be by only Moving part moves in parking lock off-direction.Activating Tapered Cup has actuating tapers, which can be with tapered guide member Part contact, which fixes relative to pressure room housing and in the form of by metal profile, so that passing through In the case that piston element realizes the longitudinal movement of gear lever, actuating tapers are supported on the alignment inclined-plane of support plate, and This deflects gear lever relative to piston element, causes the movement of actuating Tapered Cup in a lateral direction to activate parking lock, That is its locking member (parking lock pawl).

In the case where the prior art, piston element can also be obtained by means of sensor device relative to pressure chamber's shell The corresponding position of body, the sensor device is with the stroke sensor fixed in position relative to pressure room housing and is pressing There is permanent magnet outside power room housing, be connected on piston element by means of magnet holder axial restraint, so as to can The movement of piston element is followed in such a way that stroke sensor obtains.

Furthermore it is known that parking lock module there is the tightening member of screw-type, be screwed into piston element, so as to by magnetic Body retainer is fixedly connected on piston element.The tightening member is also used in terms of the movement along parking lock direction of engagement Piston element and gear lever are connected to each other.For this purpose, tightening member has contact surface, the contact surface with gear lever for connecing Touching, and gear lever has contact surface, which is formed in shift head for contacting with tightening member, changes Bar head is contained in piston element, has axial gap between tightening member and the inner sleeve of piston element.

Here, above-mentioned axial gap ensures ambulant a degree of indignation of the gear lever relative to piston element (anger).By means of the contact surface facing with each other on tightening member and on gear lever, piston element can be in parking Gear lever is pushed in lock direction of engagement.On the contrary, piston element can be pulled by means of inner sleeve and be shifted gears in parking lock off-direction Bar, the inner sleeve can be contacted with the shift head of piston element.

The shortcomings that the prior art, is, in the case where misuse power acts on gear lever along parking lock off-direction, The power can may also be transmitted to brake unit for delivery to piston element and therefore, these or adjacent component is caused to be damaged Bad risk.Such as this misuse power may occur during the disengaging of parking lock on the slope.Here, the cause of parking lock module Dynamic Tapered Cup supports strongly between support plate and the locking member (parking lock pawl) of parking lock, so that when pulling out actuating taper It must overcome high frictional force when part.Then, under certain pullout forces, actuating Tapered Cup discharges suddenly and in parking lock disengaging side Acutely accelerate upwards；This leads to sedimentation of the spring element on gear lever and rushes on the direction of piston element to gear lever It hits.It can also happen that misapplying power accordingly in the case where the too early engagement of parking lock, in this case, when vehicle rolls simultaneously And parking lockwheel therefore still when rotated, locking member (parking lock pawl) on the tooth of parking lockwheel " ratcheting " hair It is raw.

Summary of the invention

Problem solved by the invention is to provide a kind of most probable for activating the parking lock in motor vehicles and simply sets The parking lock module of meter, about the prior art discussed, which avoids disadvantages mentioned above and optimised, especially It is without damage operating aspect.

Described problem is by a kind of feature with claim 1 for activating the parking of the parking lock in motor vehicles Lock module solves.Dependent claims are related to advantageous embodiment of the invention.

It is a kind of for activating the parking lock module of the parking lock in motor vehicles in the case where, which has Shell accommodates piston in the shell, which is operably connected to piston rod and passes through piston bullet along locking direction Spring is pre-loaded to latched position with spring force, wherein the piston can selectively be fixed by stop device relative to shell, And the piston can bear pressure load along the unlocking direction opposite with locking direction by means of pressure chamber, in stop device quilt In the unlocked position opposite with the spring force of piston spring when release, wherein actuating element is arranged in axially-displaceable flowing mode On piston rod, which abuts against setting relative to piston rod on the piston rod by piston rod spring on locking direction Retainer preload, and the actuating element can be moved to unlocked position with piston and through retainer on unlocking direction Mobile, according to the present invention, piston spring is bonded on piston by thrust piece, and thrust piece can be relative to piston by means of piston rod It is moved on the unlocking direction opposite with the spring force of piston spring.

In other words, according to the present invention, between piston and piston rod there are anti-traction but be not the connection of anti-thrust.Cause This, since the latched position of piston, when the pressure chamber in release locking device and shell is pressurized, by with piston bullet The opposite piston of the power of spring can pull actuating element by means of the retainer on piston rod on unlocking direction.On the contrary, locking Determine on direction, since the unlocked position of piston, piston spring is directly born against on piston rod via thrust piece, and piston rod exists Piston is pressed in actuating element when being stopped device release by piston rod spring.It therefore can be with by the piston of stop device release Apply pulling force to piston rod on unlocking direction.It, cannot will be any by the piston of stop device release however, on locking direction Thrust is transmitted to piston rod, that is to say, that separates in terms of thrust with piston rod.Thrust is transmitted by thrust piece by piston spring To piston rod without being inserted into piston.

This leads to the misuse power acted on piston rod along unlocking direction, such as can be in the sedimentation with piston rod spring (settling) and in the case that actuating element quickly returns piston rod, Bu Nengchuan are introduced (referring to the discussed above of the prior art) It is delivered to piston, but by being passed forward to from the thrust piece lifted on piston in piston spring and " being siphoned away " there.Cause This, piston spring is applied not only to realize that parking lock module keeps latched position in the case where no actuating pressure, but also with Thrust piece together simultaneously piston rod be not by piston cause make piston rod and piston in the case where movement along unlocking direction Separation.As a result, this impact along unlocking direction on piston and on the stop device to interact with piston will not draw Play any damage.

Thrust piece preferably has guidance extension on the side far from piston rod, by means of being fastened to shell again Guide bushing is guided.This advantageously produces the long length of lead of thrust piece, and avoids thrust piece relative to shell Inclination and the possible relevant mechanical movement weight during thrust piece displacement.In a preferred embodiment, guide bushing is this In the case of shell is attached to by bayonet connection.Threaded connection, welded connecting or Nian Jie company between guide bushing and shell Connect (such as it is also contemplated that) compare, this shape, which is cooperatively connected, is very easy to assembling.In addition, about equally possible in principle Guide bushing and shell between quick connection, the bayonet connection this have the advantage that, it is not necessary to provide additional axial group Stroke is filled so that connecting element is engaged with each other, this is conducive to short structure length in turn.

For the ventilation and degasification of the inner space of shell during piston moves in the interior space, the side wall of shell can Equipped with one or more degasification plates.Rather, it is preferred to which guide bushing is since the end far from piston equipped with being used for The opening of ventilation and/or degasification is carried out to the inner space of shell, this is not only easy to be formed, such as by being molded with guide bushing It is shaped to " being removed from the molds " plastic components, without reprocessing, and opening is further minimized and is undesirably covered Risk.

In the construction particularly suitable for assembling process, piston spring can also be supported on by means of the end far from piston to be drawn On guide bush, so that guide bushing advantageously also serves as latch plate and therefore combines multiple functions.It is here preferred that piston Spring is formed as spiral compression spring.However, it is also possible to expect the spring of other forms, such as one lamination of spiral case spring or use Spring.

Especially with free movement and there is gap and the abrasion of very little about hinged on piston of piston rod, into One step is preferably, and piston rod has bulb on its piston side end, and piston rod is mounted on carrying by the bulb hinged In seat, bearing seat is formed on piston.However, piston rod also can have lens shaped head as the substitution to this, the lens Forming head portion is for example interacted with the planar abutment surface on tractive force and piston, however this will be needed between the component being related to Increase gap and increases hertz stress.

In addition, in a preferred embodiment, thrust piece can have carrying protrusion on the side towards piston rod, described to hold Carry the spherical cap abutment surface for the bulb that protrusion has for piston rod.Here, substantially it is also contemplated that for work Stopper rod head, is arranged straight or plane abutment surface in thrust piece, however this is for gap increased on contact area and increasing It is then less preferable for the hertz stress added.

In order to form shell, piston and/or thrust piece, however, it would be possible to use metal material, especially iron material and non- Ferrous metal, such as the alloy based on aluminium.Especially for the production of low weight and cheap and simple as mass produced components, so And be preferably, shell and/or piston and/or thrust piece are formed as plastic components, especially plastic injection piece.

Here, in the especially preferred embodiments, metal profile can be integrated in the housing by plastic overmold, The support plate forms the support for being used for actuating element.In addition to there is relatively low case weight in the position of mechanical especially high load (however) a small amount of abrasion the advantages of except, support plate therefore can be with seldom assembly expenses relative to shell and will accommodate It is precisely located in the accurate and reproducible mode of component wherein.

For a similar reason, it is therefore particularly preferred that in order to engage stop device, be formed as the piston quilt of plastic injection piece Reinforcement has metal collar sleeve, which is embedded in the plastic material of piston.

About the sealing of the pressure chamber in shell, depending on parking lock module using position (such as in motor vehicles In case of transmission), such as clearance seal can be provided, there is a small amount of controlled leak of pressure medium, Huo Zhe by gap The fluted link preloaded by O-ring is provided between piston and shell.However, it is preferred that the pressure between piston and shell Power room is sealed by sealing device relative to ambient enviroment, which includes two band grooved rings, they are axially spaced apart from each other It opens and is attached on piston, or be alternatively attached on shell.In corresponding running surface have dynamic sealing lip and This band grooved ring in corresponding mounting surface with static sealing lip can be used easily as standarized component.This sealing The sealing function of device is also advantageously allowed for using the dedicated operations medium for parking lock module, may be with the behaviour of speed changer Make medium difference；Pollutant is also impossible to be externally entering pressure chamber.

In the preferred embodiment of parking lock module, the sensor device for obtaining piston position may be provided for, it should Sensor device is with the position detector fixed in position relative to shell and the position for being operably connected to piston Encoder.By means of the piston position detected, such as it may infer that (park lock connects for the corresponding operating state of parking lock module It closes or park lock is detached from).Moreover, the pressurization of pressure chamber can be controlled in a manner of the piston stroke depended in shell.

Substantially the position coder of sensor device can be directly connected to piston or be arranged on piston.However, Preferably, the guidance extension of thrust piece is mounted on for the retainer of position coder, this allows accurate acquisition piston The position of (and piston rod) engages with the tractive force on piston and the thrust in thrust piece, but begins in this case It is contacted eventually with thrust piece.Here, the guide protrusion of thrust piece can draw indirectly by the retainer for position coder It is guided in guide bush, this advantageously causes long length of lead and low inclination tendency, even for the guarantor of position coder Holder is also such.

In addition, in a preferred embodiment, which may be configured so that the retainer for position coder axially It is maintained on the guidance extension of thrust piece without gap but is not rotationally coupled to thrust piece.Thus, for example due to piston The compression of spring and retainer cannot be transmitted to and hinder or prevent its axial displacement by being bonded on the torque in thrust piece.

Here, the retainer for position coder can for example be maintained at the guidance of thrust piece by means of fixed ring or screw On the free end of the separate piston of extension.On the contrary, especially with regard to the axially free of simply assembling and basic gap Degree, however preferred embodiment is wherein to be prolonged for the retainer of position coder by the guidance that quickly connection is maintained at thrust piece In extending portion.It is also easy to using the quick connection of plastics (injection molding) realization and low in cost.

Finally, it is preferred that the retainer for position coder has arm, position coder is maintained at shell at the arm On the circumference of body, wherein it is formed with rib on the excircle of shell, it is dynamic with rail-like along locking direction and unlocking direction Make guidance retainer, and the fixed retainer is to prevent from rotating relative to shell.It is compiled about the position being equally conceivable Arrangement of the code device in the inner space of shell, it is position coder first which, which especially allows greater flexibility, Minimum possible size, followed by positioning of the position detector relative to position coder.The guide device discussed is on shell With rib, which further improves the high-caliber acquisition precisions of sensor device, and are furthermore equally realized using plastics It is easy and cheap.

Detailed description of the invention

Below with reference to appended partial schematic diagram, the present invention is discussed in more detail based on preferred exemplary embodiment, Wherein:

Fig. 1 shows parking lock module according to the present invention with the view towards the metal profile for actuating element and exists It can lead to from the perspective view using position on upper/left front inclined parking lock (only symbolically showing herein), the parking lock The actuating element actuating being arranged on the piston rod of parking lock module being axially movable is crossed, which is integrated in parking mode locking In the shell of block being made of plastics；

Fig. 2 is shown with the view towards the position coder of sensor device from the as shown in Figure 1 of down/left rear-inclined The perspective view of parking lock module, the position coder are connected to the piston of parking lock module by retainer, and retainer is on the outside By leader with rail-like movement (rail-like action) guidance on shell, to prevent it from revolving relative to shell Turn；

Fig. 3 shows the plan view for the parking lock module as shown in Figure 1 seen above in Fig. 1, wherein the spine of parking lock Pawl is shown in section view；

Fig. 4 shows the lower view for the parking lock module as shown in Figure 1 that lower section is seen from Fig. 1；

Fig. 5 shows the rearview of parking lock module as shown in Figure 1, around the centring pin for being fastened to support plate By partly section in region；

Fig. 6 shows the plane according to the parking lock module as shown in Figure 1 of the cross section contour VI-VI in Fig. 3 in figure In the cross-sectional view that is rotated by 90 ° counterclockwise, the further details of the stop device for showing parking lock module；

Fig. 7 is shown to scheme according to the parking lock module as shown in Figure 1 of the offset cross section contour VII-VII in Fig. 3 Plane in the sectional view that is rotated by 90 ° counterclockwise, it is same that there is the pawl being shown in section view, it is further thin in addition to support plate Except section, which particularly illustrates how the actuating element on piston rod contacts with the support section of support plate, the support It is partially protrude through except the plastic material of shell；

Fig. 8 is shown to exist according to the parking lock module as shown in Figure 1 of the offset cross section contour VIII-VIII in Fig. 4 The sectional view being rotated by 90 ° counterclockwise in the plane of figure extends especially through the hydraulic port of parking lock module；

Fig. 9 show parking lock module as shown in Figure 1 according to the cross section contour IX-IX in Fig. 4 in shell area Middle cross sectional side view, wherein the piston of parking lock module is located at latched position, by stop device relative to shell stop, and And it is schematically indicated relative to the position detector that case of transmission is fixed opposite with position coder；

Figure 10 shows the section section view of the parking lock module as shown in Figure 1 according to the cross section contour X-X in Fig. 4 Figure, wherein further illustrating details for the rail-like guiding piece of the retainer of the position coder on shell.

Figure 11 shows the basis in the region of the rail-like guiding piece of the retainer of the position coder on shell The section that the parking lock module as shown in Figure 1 of cross section contour XI-XI in Figure 10 is rotated by 90 ° counterclockwise in the plane of figure Cross-sectional view；And

Figure 12 is shown the as shown in Figure 1 of the detailed circle XII according to fig. 2 with magnification ratio relevant to Fig. 1 and stayed The perspective view of lock module, not for the retainer of position coder in order to provide the view of the leader of shell.

In the accompanying drawings, elasticity or elastomer member especially dynamic sealing are shown with non-deformed state, with simplified illustration； In fact, these deformable components abut against the adjacent surface of adjacent component.

Specific embodiment

In Fig. 1 to 9, appended drawing reference 10 is commonly used in indicating the parking lock for activating the parking lock 12 in motor vehicles Module.As shown in Figure 1, parking lock 12 has parking lockwheel 14 in a way known, the parking lockwheel 14 is rotatably total It is arranged on the transmission shaft (not shown) of motor vehicle transmission to same and axial restraint and it has tooth 16 on excircle. In order to which by shape interoperation, come the power train of stop motor vehicles, parking lock 12 also has pawl 18 (only in Fig. 1,3 and 7 In show), which is hinged on case of transmission (being not shown here), in order to around pivot axis 20 pivot.Pawl 18 With locking teeth 22, the locking teeth 22 during pawl 18 is pivoted around pivot axis 20 can shape-ordinatedly with parking lockwheel 14 tooth 16 engages.Reference marker 24 indicates that the hole in pawl 18, the hole are engaged by reset spring (being not shown here), this is multiple Position spring is supported relative to case of transmission and will be far from the pawl 18 of parking lock fixed wheel 14 around 20 pre-add of pivot axis It is downloaded to unlocked position.

In order to pivot pawl 18 around pivot axis 20, in the illustrated exemplary embodiment, in parking lock module 10 Upper setting actuating element 26, the actuating element have (double) conical surface portion 28.Actuating element 26 is to be not yet described in detail Mode is selectively moved axially along locking direction S or unlocking direction E by actuating mechanism 32 (referring to Fig. 9), such as the and of Fig. 1,3,4 Shown in arrow in 9, actuating mechanism 32 is contained in the shell 30 of parking lock module 10 by actuating component 34, actuating component 34 It is hingedly attached to actuating mechanism 32.Here, as shown in Figure 1, being supported on the end of the separate actuating component 34 of actuating component 34 The conical surface portion 28 of actuating element 26 be supported on tapered guide element, which fixes relative to shell And in the form of metal profile 36.

Therefore, in actuating element 26 along during the axial movement of locking direction S, the pawl 18 in Fig. 1 surrounds pivot axis 20 are rotatably promoted, and the power of reset spring (not shown) are resisted, to match locking teeth 22 and 16 shape of tooth of parking lockwheel 14 Close ground engagement.On the contrary, in the case where actuating element 26 is axially moved along unlocking direction E, the tapered surface portions of actuating element 26 28 are divided to be pulled away from its position between pawl 18 and support plate 36.This causes the pawl 18 in Fig. 1 due to the power of reset spring And around the pivot 20 rotatably declines, wherein locking teeth 22 is detached from from the tooth 16 of parking lockwheel 14.In other words, actuating element 26 Conical surface portion 28 can be contacted with support plate 36, so that conical surface portion 28 is in the actuating generated by actuating mechanism 32 It is supported on along the longitudinal direction during the movement of component 34 on the support section 38 of support plate 36, and inclined with actuating component 34 Turn, the movement of actuating element 26 in a lateral direction is realized, to activate parking lock 12.

About the further details of actuating mechanism 32, first with particular reference to Fig. 9.According to the figure, actuating mechanism 32 has Piston 40, piston 40 are contained in the shell 30 of parking lock module 10, are vertically moved and can be grasped in order to along central axis M It is connected to the piston rod 42 of actuating component 34 with making.Piston 40 is on locking direction S by piston spring 44 with spring force pre-add It is downloaded to latched position (as shown in Figure 9), wherein the piston can be selectively solid relative to shell 30 by means of stop device 46 Fixed, this will be discussed in greater detail below.In addition, piston 40 can by the pressure chamber 48 that is arranged in shell 30 with locking Bear pressure load on direction S opposite unlocking direction E, so as to when discharging stop device 46 in the bullet with piston spring 44 The opposite unlocked position of spring force.Therefore, piston 40 can be moved to unlocked position from latched position, and vice versa, and mode takes Certainly in the actuating state of stop device 46.

In addition, the actuating being axially displaceably arranged on piston rod 42 is first by piston rod spring 50 (propelling spring) Part 26 abuts against the retainer 52 being arranged on piston rod 42 on locking direction S relative to piston rod 42 and preloads.Helically The piston rod spring 50 of spring form be used as energy accumulator, for pawl 18 by 10 activating of parking lock module with Its locking teeth 22 abuts against the case where tooth for the parking lockwheel 14 not engaged shape-ordinatedly with tooth 16.In this case, Piston rod spring 50 ensures that the actuating element 26 of springs preload makes pawl 18 advance when motor vehicles roll, so that the spine The locking teeth 22 of pawl 18 is engaged with the tooth 16 of parking lockwheel 14.In the opposite direction, actuating element 26 can solved with piston 40 The movement of lock position and moved on unlocking direction E by retainer 52, that is to say, that be pulled.

In this case, corresponding position of the piston 40 in shell 30 can be obtained by sensor device 54, the biography Sensor arrangement 54 has position detector 56 (only schematically showing in Fig. 9), fixes in position relative to shell 30, And position coder 58, it is operably connected to piston 40.More specifically, being located at the position coder 58 outside shell 30 It is connected to piston 40 in a manner of it will describe retainer 60, enables position coder 58 so that position detection can be passed through The mode that device 56 obtains follows the longitudinal movement of piston 40.

Will be discussed in detail below, about the prior art discussed in introduction, shown in accoding to exemplary embodiment Especially with respect to following three points, (i to iii) exists: first (i), piston spring 44 passes through the various specific characteristics of parking lock module 10 Thrust piece 62 is bonded on piston 40, and thrust piece 62 can be relative to piston 40 in the bullet with piston spring 44 by means of piston rod 42 It moves on the opposite unlocking direction E of spring force (referring particularly to Fig. 9).Furthermore (ii), for position coder 58 retainer 60 with Piston 40 is rotatably separated and is moved by means of outside of the leader 64 on the shell 30 of parking lock module 10 with rail-like It is guided, to prevent from rotating (referring particularly to Fig. 2 and 12) around central axis M.Furthermore (iii), in addition to parking lock module 10 Other parts, shell 30 are molded of plastic material, and metal profile 36 is integrated in shell 30, so that in order to first with actuating Part 26 contacts, and the support section 38 of support plate 36 protrudes past the plastic material of shell 30 (referring particularly to Fig. 1 and 7).

If Fig. 7 and 9 is particularly illustrated, the support plate 36 for forming the support for actuating element 26 passes through the plastics with shell 30 It is overmolded and be integrated in shell 30.As illustrated in fig. 1 and 2, the support plate 36 being laterally extended relative to central axis M is in parking In the region of the front longitudinal end of lock module 10, therefore it is maintained in the plastics of shell 30 in form-fit fashion and and shell Body 30 is formed together a component.Here, support plate 36 is also used to that parking lock module 10 is fastened in the motor vehicle and used In parking lock module 10 is positioned relative to parking lock 12.

About the fastening of parking lock module 10 in the motor vehicle, as shown in Fig. 1 to 4 and Fig. 7, support plate 36 is equipped with tight Solid hole 66,68.Fastener hole 66,68 in support plate 36 is formed adjacent to the parallel channels of the respective transversal end of support plate 36 Hole, as being clear that in Fig. 7.In addition, the fastening for parking lock module 10 in the motor vehicle, parking lock module 10 Shell 30 at the position being spaced apart with support plate 36 in the flange lug 72 of shell 30 equipped with fastener hole 70, which leans on The rear longitudinal end of nearly parking lock module 10.Here, fastener hole 70 is lined with the stop sleeve 74 of metal collar form of sleeve, leads to It crosses and is fastened on shell 30 with the plastic overmold of shell 30, as shown in Figure 8.Under the assembled state of parking lock module 10, Cap screw (not shown) is engaged with radial clearance from the lower section in Fig. 1 by fastener hole 66,68,70 and is screwed into speed change In the associated threads hole of device shell (not shown), so that parking lock module 10 is pulled to case of transmission securely and is stayed by described in Lock module is fastened to case of transmission.

In order to position parking lock module 10 axially and angularly relative to parking lock 12, it is additionally provided with and is permanently connected To two centring pins 76,78 of shell 30.One centring pin 76 is fixed in hole 80, and hole 80 is formed in support plate 36, neighbouring And it is parallel to fastener hole 66, the centring pin is for example pressed into as round metal cylindricality positioning pin, as shown in Fig. 5 and Fig. 7.On the contrary, Fastener hole 70 of another centring pin 78 on flange lug 72 forms one with plastic casing 30 (referring to Fig. 1 and 3).In In Fig. 1, centring pin 76,78 is projected upwards from the flange lug 72 or support plate 36 of shell 30, for (not showing with case of transmission Located in connection hole engagement in out).

The further details of support plate 36 particularly occur on Fig. 1,7 and 9.According to the figure, support plate 36 by shell The support section 38 of 30 plastic material exposure has substantially partial cylindrical surface part 82, the taper table of actuating element 26 It face part 28 can be with the adjacent placement of the surface portion 82.More specifically, partial cylindrical surface part 82 is in support plate 36 It is as shown in Figure 9 towards on the side of actuating mechanism 32 equipped with fillet 84, the wherein conical surface portion 28 of actuating element 26 Transition position between fillet 84 and partial cylindrical surface part 82 along certain arc length in a substantially linear fashion with Support plate 36 contacts, as shown in Figure 7.For this purpose, the radius of the partial cylindrical surface part 82 of the support section 38 of support plate 36 It is selected as the maximum radius of the conical surface portion 28 slightly larger than actuating element 26.In the contact, actuating member as shown in Figure 7 Part 26 is pressed against on pawl 18 on the region of similar type, pawl 18 and the above-mentioned reset spring by means of being bonded on hole 24 It is preloaded on the direction of support plate 36.

As shown in figure 9, shell 30 is in interior lateral edge central axis M equipped with continuous staged receiving cutout 86, the notch Inner space 88 is limited, for receiving actuating mechanism 32 and especially piston 40.There are two different-diameters for the tool of receiving cutout 86 Hollow cylindrical cut out portion 90,92, therebetween have step 94, the step at piston 40 its latched position retainer. Corresponding to the receiving cutout 86 in shell 30, piston 40 is stepped-style, with the relatively small secondary piston part 96 of outer diameter, outer diameter The step 94 of relatively large rear piston portion 98 and therebetween annular shoulder 100, the annular shoulder and shell 30 is mutual Effect.

Also shown in FIG. 9, pressure chamber 48 is between piston 40 and shell 30 by sealing device relative to ambient enviroment Sealing, the sealing device include two band grooved rings 102,104, they are axially spaced from one another and are attached to piston 40.More Body has the rear piston portion 98 of opposite major diameter equipped with for receiving radial slot 106 with grooved ring 102, and with phase Have the secondary piston part 96 of minor diameter for receiving the radial slot 108 with grooved ring 104.Those skilled in the art are clear It is such as to be observed in axis projection, therefore piston 40 has annular hydraulic active surface, pass through abutting against with grooved ring 102 The dynamic sealing lip of the inner periphery of the cut out portion 92 of shell 30 is radially limited to outside, and it passes through with grooved ring 104 The dynamic sealing lip for abutting against the inner periphery of the cut out portion 90 of shell 30 is radially limited to inside.By the active surface, Piston 40 can on unlocking direction E hydraulic action.Degasification for pressure chamber 48, can be in (or two) radial slot 106, deaerating tank (not shown) is set on 108 base portion, and the deaerating tank is below corresponding grooved ring 102,104 along central axis M extends.

For the hydraulic load of pressure chamber 48 and piston 40, as shown in Fig. 2,4 and 8, shell 30 has one in downside The pressure port 110 of formation, the pressure port 110 pass through the pressure chamber 48 between interface channel 112 and shell 30 and piston 40 Connection, the interface channel are parallel to central axis M and extend and be formed in shell 30 (referring to Fig. 6 to 8).Interface channel 112 Lead to the inner end at the step 94 of the shell 30 in pressure chamber 48, it is opposite with the annular shoulder 100 of piston 40.It is another outer at its End, as illustrated in figures 1 and 7, interface channel 112 are closed by plastic plug 114 relative to ambient enviroment, 114 ultrasonic welding of plastic plug Onto shell 30.

In Fig. 9, the right hand end in secondary piston part 96 is similarly formed as plastic injection to engage stop device 46 The piston 40 of part is reinforced by metal collar sleeve 116 on excircle, and metal collar sleeve 116 is embedded in the plastics material of piston 40 In material.Covering ring sleeve 116 has outer profile, which allows piston 40 to lock relative to shell 30 by means of stop device 46 In the latched position or unlocked position of piston 40.For this purpose, stop device 46 has made of metal lever 118, which can It is movably contained in the brake bar notch 120 of shell 30, which is laterally extended relative to central axis M.More Specifically, brake bar 118 can pivot (referring to the double-head arrow in Fig. 6) around metal brake lever pin 122, the metal brake lever pin 122, which are parallel to central axis M, extends and in the plastic material of heat insertion shell 30 to the two sides of brake bar notch 120.

Best seen in from Fig. 6, brake bar 118 surrounds brake bar by means of brake-rod spring 124 in Fig. 6 122 counter clockwise direction of pin is pre-loaded to the application position on the set ring sleeve 116 of piston 40.Be formed as the system of spiral compression spring Lever spring 124 is guided in the cylindrical receiver protrusion 126 being integrally formed with shell 30, and is bonded on brake bar 118 Activation projection 128 on.In order to selectively moved brake bar 118 against brake-rod spring 124 spring force from its retarder location It sets into the non-braking position (this allows piston 40 to move along central axis M) far from the set ring sleeve 116 on piston 40, stop The tool of device 46 is there are two the unlocking mechanism that can activate independently of one another, the unlocking mechanism that can specifically electrically activate and can be hydraulic The unlocking mechanism of activation.

Stop device 46 has by the unlocking mechanism that connection terminal 130 can electrically activate shown in Fig. 2,4 to 6 and 9 Electromagnetic actuators 132 (stroke magnet), flange is mounted on the shell 30 of parking lock module 10 and passes through screw from below 134 are held in place.For this purpose, if the shell 30 of Fig. 2 and 4 is equipped with the screw-thread bush 136 for receiving screw 134, screw thread lining Set with the plastic overmold of shell 30 by being embedded in shell 30.Electromagnetic actuators 132 have pin-shaped actuating end 138, the cause It moved end 138 can be according to the electrical activation of actuator 132 and corresponding to the double-head arrow axial movement in Fig. 6 and 9 and itself and brake bar 118 promotion end 140 engages, which is arc in Fig. 6.

It will be clear to someone skilled in the art that by the appropriate electric excitations of electromagnetic actuators 132, brake bar 118 can be by In the actuating end 138 promoted on end 140 for being bonded on brake bar 118 of actuator 132 against the brake-rod spring 124 in Fig. 6 Spring force around brake rod pin 122 clockwise promoted and pivot so that brake bar 118 is released from the set ring sleeve 116 of piston 40 It puts.

By means of can hydraulic activation unlocking mechanism, brake bar 118 can correspondingly pivot around brake rod pin 122, for this purpose, As shown in fig. 6, this can hydraulic activation unlocking mechanism have round metal pin 142, on excircle have slip ring 144, can It is movably contained in the cylinder-bore 146 of shell 30.For the hydraulic load of cylinder-bore 146 and cylinder pin 142, such as Fig. 4 and 8 Shown in shell 30 downside have another pressure port 148, be formed on shell 30, to be parallel to pressure end Mouth 110 is arranged.Another pressure port is connected to by another interface channel 150 and cylinder-bore 146 (referring to fig. 4 with 6 to 8), The interface channel 150 is formed in shell 30 and obliquely extends relative to central axis M.The inner end of interface channel 150 with Cylinder-bore 146 intersects, as shown in Figure 6.In its another outer end, as illustrated in figures 1 and 7, interface channel 150 passes through 152 phase of plastic plug Ambient enviroment is sealed shut, plastic plug 152 is ultrasonically welded on shell 30.

To those skilled in the art, again it is clear that right by pressure port 148 and interface channel 150 In the case that cylinder pin 142 carries out hydraulic loaded, the cylinder pin 142 in Fig. 6 is mentioned in cylinder-bore 146 corresponding to double-head arrow It rises, wherein straight pin 142 is resisted against the promotion protrusion 154 of the lug-shaped of brake bar 118 with its end for protruding past shell 30 On.Here, brake bar 118 is lifted, and suitable around brake rod pin 122 against the spring force of brake-rod spring 124 in Fig. 6 Hour hands pivot, so that brake bar 118 is discharged from the set ring sleeve 116 of piston 40.(it has passed through electromagnetism or hydraulic dress to piston 40 Set and discharged from stop device 46) now can according to the actuating state of parking lock 12 and by the spring force of piston spring 44 from Its unlocked position is moved to its latched position or is moved to its unlock from its latched position by the hydraulic loaded of pressure chamber 48 Position.

In addition, especially as shown in figure 9, piston 40 is formed as the hollow part of rotational symmetry, in Fig. 9 from right to left With funnel-shaped opening region 156, for piston rod 42 piston side end receiving area 158 and for thrust piece 62 The hollow cylindrical receiving area 160 of piston side end.Piston rod 42 prolongs to the right in Fig. 9 from the open area of piston 40 156 It stretches, wherein the support lantern ring 162 for piston rod spring 50 being formed on piston rod 42 is axially located at the opening of piston 40 In region 156.According to the outer diameter of support lantern ring 162, piston rod 42 can be pivoted in open area 156 relative to piston 40.

In its piston side end, metallic piston bar 42 has bulb 164, and bulb 164 is maintained at the central acceptance of piston 40 In region 158.Here, bulb 164 is supported on bearing seat 166, and bearing seat 166 has the complementary shape relative to ballhead 164 It shape and is formed on piston 40, so that piston rod 42 is hingedly mounted on piston 40.Thrust piece 62 is towards piston rod 42 Side there is carrying protrusion 168, which extends in the receiving area 158 of piston 40 and has for piston rod 42 The spherical cap abutment surface 170 of bulb 164.The bearing seat 166 and thrust piece 62 of the bulb 164 of piston rod 42 in piston 40 It is kept substantially very close to each otherly between spherical cap abutment surface 170.

Finally, receiving the head 172 of thrust piece 62, the head in the left hand receiving area 160 of the piston 40 in Fig. 9 It is similarly formed as plastic injection piece.Carrying protrusion 168 is formed on the head 172 of thrust piece 62.In addition, thrust piece 62 Head 172 equipped with lantern ring 174, form the support of the piston side end of piston spring 44, around head 172 and extend Into the receiving area of piston 40 160.Helically the piston spring 44 of spring form abuts against piston 40 with its lantern ring 174 Annular shoulder 176 preload thrust piece 62, the annular shoulder be located at receiving area 158 and piston 40 receiving area 160 it Between.

In addition, especially can as seen from Figure 9, thrust piece 62 has in the side far from actuating component 34 or piston rod 42 Guide extension 178.It such as will be discussed in further detail below, the pin-shaped guidance integrally abutted with the head 172 of thrust piece 62 Extension 178 is guided by means of guide bushing 180 relative to shell 30, on guide bushing 180 itself tight to shell 30. In the illustrated exemplary embodiment, the guide bushing 180 for being similarly formed as plastic injection piece is fastened to shell by bayonet connection Body 30, bayonet connection are indicated in Fig. 2 to 5 and 9 with reference label 182.Use for the clutch master cylinder as hydraulic cylinder The bayonet connection 182 of situation, the type is retouched in detail in the German patent application DE102016006053A1 of same applicant It states, about the structure and function of the connection, at this crucial hour explicitly with reference to the document.

As shown in figure 9, piston spring 44 is supported on guide bushing 180 with its end far from piston 40.More specifically, Guide bushing 180 on the side of its inner space 88 towards shell 30 equipped with annular incision 184, piston spring 44 it is remote The end from piston 40 extends in annular incision 184.Therefore, guide bushing 180 also serves as the shell for piston spring 44 Side latch plate.

It will therefore be apparent that any impact of the piston rod 42 on unlocking direction E, such as can be in actuating element 26 Quickly return and piston rod spring 50 are introduced into piston rod 42 in the case where settling via support lantern ring 162, cannot be transmitted to Piston 40, but be transmitted to guide bushing 180 via thrust piece 62 in a manner of being damped by piston spring 44 and be therefore transmitted to Shell 30.In other words, between piston 40 and piston rod 42, although the bulb 164 due to piston rod 42 abuts against piston 40 Bearing seat 166 and have anti-traction shape be cooperatively connected, but without anti-thrust connection, because if being applied to piston rod 42 Thrust be more than piston spring 44 preloaded force, then by the bulb 164 of piston rod 42 via the thrust that pushes of carrying protrusion 168 Part 62 can be lifted from piston 40 at the annular shoulder 176 of piston 40.

Guide bushing 180 also executes ventilation function.If Fig. 2 and Fig. 5 are specifically shown, guide bushing 180 is from far from piston 40 End start, equipped with for shell 30 inner space 88 carry out degasification opening 186.The exemplary implementation shown in In example, the opening 186 for being parallel to central axis M extension is located on common pitch circle, and surrounds central axis M each other equably It is angularly spaced (referring to Fig. 5).

The further details of sensor device 54 particularly occur on Fig. 2,4,5 and 9 to 12.Sensor device 54 is preferably It is Hall sensor systems, with Hall element (not shown in detail) as the position detector 56 (figure fixed relative to shell 9) component part, and there is the magnet as position coder 58, piston 40 is connected to by retainer 60.It compiles position Code device 58 can for example be adhered to retainer 60, but injection molding is plastic bonding magnet preferably in retainer 60, at this In the case of kind, it is similarly formed as plastic injection piece.

Retainer 60 for position coder 58 usually has angled arm 188, and position coder 58 is maintained at shell On the excircle of body 30.In addition, the movement for piston 40 couples, retainer 60 has coupling part 190, relative to center Axis M is disposed concentrically upon and is connected to angled arm 188, more specifically, in the illustrated exemplary embodiment, by keeping The plastic material and arm 188 of device 60 are integrally molded molding.

Movement connection for piston 40, the coupling part 190 of retainer 60 as shown in Figure 9 extends to the interior of shell 30 In portion space 88.Here, the sleeve-shaped coupling part 190 of retainer 60 is by means of the guide bushing 180 that is fastened on shell 30 It is guided and is maintained on the guidance extension 178 of thrust piece 62, axially there is no playback (playback), without It is rotationally coupled to thrust piece 62.In other words, the guidance extension 178 of thrust piece 62 extends to the coupling part of retainer 60 In 190 and by the latter, so that the guidance extension 178 of thrust piece 62 passes through more specifically its coupling part of retainer 60 190 are guided in guide bushing 180 indirectly, for this purpose, it has hollow cylindrical guiding surface 192 in central area.

It can also be seen that the movement for the retainer 60 for position coder 58 to piston 40 couples in Fig. 9, mention Snap-action has been supplied to connect 194.By snap-action connection 194, the retainer 60 for position coder 58 is maintained at drawing for thrust piece 62 It leads on extension 178, wherein snap-action connection 194 is arranged on the end of coupling part 190 of retainer 60, and the end is close to living Plug.In this case, the coupling part 190 of retainer 60 is formed with multiple slits, to form spring arm 196, spring arm 196 have lug-shaped protrusion 198 in its free end on inner periphery.Lug-shaped protrusion 198 is under the assembled state of retainer 60 It is bonded on behind the circumferential collar 200 on the guidance extension 178 of thrust piece 62.Since the coupling part 190 of retainer 60 is gone back The head 172 of thrust piece 62 can be abutted against in surface side, the coupling part 190 of retainer 60 is axial solid in form-fit fashion Surely thrust piece 62 is arrived, but still allows thrust piece 62 relative to 60 relative rotation of retainer.

About drawing for the retainer 60 for being used for position coder 58 on the outside for the shell 30 in parking lock module 10 The guide sections led and (acted with rail-like) point 64, also with particular reference to Fig. 2 and 12.According to the figure, in the outer circle of shell 30 Leader 64 on week has rib 202,204, and rib 202,204 is integrally molded and along lock by the plastic material of shell 30 Direction S and unlocking direction E are determined with rail-like motion guiding retainer 60, and the fixed retainer is to prevent relative to shell 30 rotations.Rib 202,204 longitudinally extends relative to central axis M and the rib 206 by being laterally extended relative to central axis M Reinforce.

Here, leader 64 has the first guiding surface 208 on external fin 202, during the first guiding surface 208 is parallel to Mandrel line M extension and facing each other and the arm 188 with the retainer 60 for position coder 58 (referring also to Figure 10) First be laterally abutted surface 210 interaction, with Support Position encoder 58 prevent around central axis M rotate.In addition, drawing Part 64 is led at least one (being in the illustrated exemplary embodiment two) another guiding surface 212, is formed in interior On rib 204, internal-rib 204 is between central axis M and position coder 58, and as shown in figure 11, and for position encoded At least one another abutment surface 214 on the arm 188 of the retainer 60 of device 58 interacts, to exist relative to central axis M Support Position encoder 58 in the radial direction.Since retainer 60 is formed by plastics and due to plastics after injection molding process Shrinkage behavior, the arm 188 of retainer 60 abut against the guidance of shell 30 with lesser spring force together with another abutment surface 214 Another guiding surface 212 of part 64.

It can be clearly seen that retainer 60 passes through its angled arm relative to central axis M in from the description above 188 or coupling part 190 along the circumferential direction between rib 202 and radially on rib 204 and in guide bushing 180 Guiding surface 192 and thrust piece 62 guidance extension 178 between be guided, there is no gap or have it is very small Gap.In addition, retainer 60 and the axially coupled of thrust piece 62 also show very small gap at snap-action connection 194.This The height acquisition precision and reliability of sensor device 54 are all advantageous.However, retainer 60 and therefore position are compiled Code device 58 can be moved with low-down displacement force along central axis M relative to position detector 56 because retainer 60 with Thrust piece 62 rotatably separates, prevent those of generating torque for example during the compression of piston spring 44 from from thrust piece 62 It is transmitted to retainer 60, therefore retainer 60 will not be stuck in its guiding piece on shell 30.

Finally, by means of sensor device 54, the corresponding actuating state of parking lock module 10 available first, also It is to say whether the piston 40 of actuating mechanism 32 is located at latched position as shown in Figure 9 or is in the unlocked position.Secondly, can detecte Possibility to the damage of parking lock module 10, such as piston spring 44 is destroyed.In addition, however connecing for parking lock 12 can also be controlled It closes and separates, pressurize especially by the stroke for obtaining piston 40 and in a manner of dependent on this to pressure chamber 48.It equally can be with " ratcheting " of the pawl 18 such as referred in introduction on the tooth 16 of parking lockwheel 14 is detected, therefore can be by pressure It pressurizes to offset such case room 48.

A kind of parking lock module has shell, accommodates piston in the housing, piston is operably connected to piston rod simultaneously And latched position is pre-loaded to by piston spring along locking direction, wherein the piston can be by stop device relative to shell Selectively fix.In addition, the piston can bear pressure load along the unlocking direction opposite with locking direction by means of pressure chamber, With when stop device is released in the unlocked position opposite with piston spring power.Actuating element is with axially-displaceable flowing mode cloth It sets on the piston rod, which is abutted against on piston rod on locking direction by piston rod spring relative to piston rod Retainer preloads, and the actuating element can be moved up by retainer in unlocking direction as piston is moved to unlocked position It is dynamic.For the separation of the pressure of piston rod and piston, piston spring is bonded on piston by thrust piece, and thrust piece is by means of piston Bar can move on the unlocking direction opposite with piston spring power relative to piston.

Reference signs list

10 parking lock modules

12 parking locks

14 parking lockwheels

16 teeth

18 pawls

20 pivot axis

22 locking teeths

24 holes

26 actuating elements

28 conical surface portions

30 shells

32 actuating mechanisms

34 actuating components

36 metal profiles

38 support sections

40 pistons

42 piston rods

44 piston springs

46 stop devices

48 pressure chambers

50 piston rod springs

52 retainers

54 sensor devices

56 position detectors

58 position coders

60 retainers

62 thrust pieces

64 leaders

66 fastener holes

68 fastener holes

70 fastener holes

72 flange eyelets

74 stop sleevees

76 centring pins

78 centring pins

80 holes

82 partial cylindrical surface parts

84 fillets

86 receiving cutouts

88 inner spaces

90 cut out portion

92 cut out portion

94 steps

96 secondary piston parts

Piston portion after 98

100 annular shoulders

102 band grooved rings

104 band grooved rings

106 radial slots

108 radial slots

110 pressure ports

112 interface channels

114 plastic plugs

116 sets of ring sleeves

118 brake bars

120 brake bar notch

122 brake rod pins

124 brake-rod springs

126 receive protrusion

128 activation projections

130 connection terminals

132 electromagnetic actuators

134 screws

136 screw-thread bushes

138 actuation ends

140 promote end

142 cylinder pins

144 slip rings

146 cylinder-bores

148 pressure ports

150 interface channels

152 plastic plugs

154 promote protrusion

156 open areas

158 receiving areas

160 receiving areas

162 support lantern rings

164 bulbs

166 bearing seats

168 carrying protrusions

170 spherical cap abutment surfaces

172 heads

174 lantern rings

176 annular shoulders

178 guidance extensions

180 guide bushings

182 bayonet connections

184 annular incision

186 openings

188 angled arms

190 coupling parts

192 hollow cylindrical guiding surfaces

194 snap-actions connection

196 spring arms

198 lug-shaped protrusions

200 circumferential collars

202 ribs

204 ribs

206 ribs

208 guiding surfaces

210 abutment surfaces

212 guiding surfaces

214 abutment surfaces

E unlocking direction E

M central axis M

S locking direction S

Claims (15)

1. a kind of parking lock module (10) has shell (30), for activating the parking lock in motor vehicles (12) in shell (30) it is accommodated in piston (40), piston (40) is operably connected to piston rod (42), and passes through work along locking direction (S) It fills in spring (44) and latched position is pre-loaded to spring force, wherein the piston can be by stop device (46) relative to shell (30) it selectively fixes, and the piston can be by means of pressure chamber (48) along the unlocking direction opposite with locking direction (S) (E) pressure load is born, occupies unlocked position to resist the spring force of piston spring (44) when stop device (46) is released, Wherein, actuating element (26) is arranged on piston rod (42) with axially-displaceable flowing mode, which passes through piston rod spring (50) retainer (52) pre-add being arranged on piston rod (42) is abutted against on locking direction (S) relative to piston rod (42) It carries, and the actuating element can be moved to unlocked position with piston (40) and pass through retainer (52) at unlocking direction (E) Upper movement, which is characterized in that the piston spring (44) is bonded on piston (40) by thrust piece (62), and thrust piece (62) is borrowed Helping piston rod (42) can move up relative to piston (40) in the unlocking direction (E) opposite with the spring force of piston spring (44) It is dynamic.

2. parking lock module (10) according to claim 1, which is characterized in that the thrust piece (62) is far from piston rod (42) there is guidance extension (178) on side, the guidance extension (178) is guided by means of guide bushing (180), Guide bushing (180) is fastened to again on shell (30), preferably passes through bayonet connection (182).

3. parking lock module (10) according to claim 2, which is characterized in that the guide bushing (180) is from far from living The end of plug (40) starts equipped with the opening for carrying out ventilation and/or degasification to the inner space (88) of shell (30) (186)。

4. parking lock module (10) according to claim 2 or 3, which is characterized in that the piston spring (44) by means of End far from piston (40) is supported on guide bushing (180), wherein the piston spring (44) is preferably formed to spiral Compressed spring.

5. parking lock module (10) according to any one of the preceding claims, which is characterized in that the piston rod (42) There are bulb (164) on its piston side end, the piston rod (42) is hingedly mounted at bearing seat by the bulb (164) (166) in, the bearing seat (166) is formed on piston (40).

6. parking lock module (10) according to claim 5, which is characterized in that the thrust piece (62) is towards piston rod (42) there is carrying protrusion (168), the carrying protrusion has the spherical shape of the bulb (164) for piston rod (42) on side Hat shape abutment surface (170).

7. parking lock module (10) according to any one of the preceding claims, which is characterized in that the shell (30) and/ Or piston (40) and/or thrust piece (62) are formed as plastic injection piece.

8. parking lock module (10) according to claim 7, which is characterized in that metal profile (36) passes through plastic overmold It forms and is integrated in shell (30), which forms the support for being used for actuating element (26).

9. parking lock module (10) according to claim 7 or 8, which is characterized in that in order to engage the stop device (46), the piston (40) for being formed as plastic injection piece has been reinforced metal collar sleeve (116), the metal collar sleeve insertion In piston (40) plastic material.

10. parking lock module (10) according to any one of the preceding claims, which is characterized in that the piston (40) and Pressure chamber (48) between shell (30) is sealed by sealing device relative to ambient enviroment, which includes two troughs of belt Ring (102,104), they are axially spaced from one another and are attached on piston (40).

11. parking lock module (10) according to any one of the preceding claims, which is characterized in that sensor device (54) For obtaining the position of piston (40), which has the position detector fixed in position relative to shell (30) (56) and it is operably connected to the position coders (58) of piston (40).

12. according to parking lock module (10) described at least claim 2 and 11, which is characterized in that be used for position coder (58) retainer (60) is mounted on the guidance extension (178) of thrust piece (62), wherein the guidance of the thrust piece (62) Extension (178) is preferably drawn in guide bushing (180) indirectly by the retainer (60) for position coder (58) It leads.

13. parking lock module (10) according to claim 12, which is characterized in that be used for the holding of position coder (58) Device (60) is axially retained at very close to each otherly on the guidance extension (178) of thrust piece (62), but is not rotationally coupled to thrust Part (62).

14. parking lock module (10) according to claim 12 or 13, which is characterized in that for position coder (58) Retainer (60) is maintained on the guidance extension (178) of thrust piece (62) by quickly connection (194).

15. parking lock module (10) described in any one of 2 to 14 according to claim 1, which is characterized in that for position encoded The retainer (60) of device (58) has arm (188), and position coder (58) is maintained on the excircle of shell (30) at the arm, Wherein, on the excircle of shell (30), rib (202,204) are formed with, along locking direction (S) and unlocking direction (E) With rail-like motion guiding retainer (60), and the fixed retainer is to prevent from rotating relative to shell (30).