DE102021104795A1 - vehicle parking lock assembly - Google Patents

Abstract

The invention relates to a vehicle parking lock arrangement (1), in particular for use within a hybrid or fully electrically operated vehicle drive train (2), comprising a housing element (3) and a vehicle parking lock device (4), comprising an actuator (5), a parking lock wheel (6) and a parking lock mechanism (7), the actuator (5) interacting with the parking lock mechanism (7) in such a way that the parking lock mechanism (7) can be moved by means of the actuator (5) into a parking lock locking position, in which the parking lock pawl (8) engages the parking lock wheel ( 6) engages and so locks rotation of the parking lock gear (6), and is movable to a parking lock release position in which the parking lock pawl (8) is disengaged from the parking lock gear (6) and the parking lock gear (6) is rotatable, the parking lock mechanism (7) is designed as a parking lock pivoting lever mechanism (9), in which the parking lock pawl (8) is mounted pivotably on a ratchet pin (10). is, wherein the parking lock pivoting lever mechanism (9) comprises a translationally displaceable carriage (11) which interacts with a pawl guide surface (12) of the parking lock pawl (8) in such a way that the carriage (11) uses the pawl guide surface (12) for transferring the parking lock pawl (8) contacted in its parking lock locking position and parking lock release position, the carriage (11) being supported in a translationally movable manner in a linear guide (13) formed on the housing element (3).

Description

The invention relates to a vehicle parking lock device, in particular for use within a hybrid or fully electrically operated vehicle drive train, comprising an actuator, a parking lock wheel and a parking lock mechanism, the actuator interacting with the parking lock mechanism in such a way that the parking lock mechanism can be moved into a parking lock locked position by means of the actuator which engages the park pawl with the park gear and thus blocks rotation of the park gear, and is movable to a park lock release position in which the park pawl is disengaged from the park gear and the park gear is rotatable, the park lock mechanism being configured as a park lock pivot lever mechanism in which the parking lock pawl is pivotably mounted on a pawl bolt, the parking lock pivoting lever mechanism comprising a translationally displaceable carriage which is connected to a pawl guide surface of the parking lock k left cooperates such that the carriage contacts the pawl guide surface for transferring the park pawl to its park lock position and park lock release position.

To prevent motor vehicles from rolling away, e.g. B. on a slope, vehicles can have a vehicle parking lock device, which causes positive locking of the driven vehicle wheels within the vehicle drive train and thus prevents the vehicle from rolling away. In this way, a function similar to a handbrake is implemented in the vehicle, with a handbrake usually preventing a non-positive locking of the driven vehicle wheels, this is caused in a vehicle parking lock device by a form-fitting fuse within the vehicle drive train.

In particular, when non-mechanical components are installed in a vehicle drive train of a motor vehicle, such as automatic transmissions with hydrodynamic torque converters or vehicles with electric drives, vehicle parking lock devices are used to prevent the vehicle from unintentionally rolling away if the vehicle is stationary or the engine is switched off. For this purpose, the vehicle parking lock devices can be mechanically, electrically and/or hydraulically activated by the driver using a parking lock operating device.

The vehicle parking lock device typically blocks a shaft within the power flow in a vehicle drive train, for example an automatic transmission or a downstream differential axle drive. The shaft to be blocked is selected in such a way that blocking it reliably prevents the drive wheels of the motor vehicle from moving.

When parking a vehicle on a slope, for example, the weight of the vehicle, depending e.g. on the wheel diameter and the gear ratio, can generate large forces on the parking lock mechanism. Since these high forces must be overcome when unlocking the vehicle parking lock device on a slope, purely manual unlocking cannot always be carried out safely and easily for a user, so that electrical and/or hydraulic actuators have now been established to effect this unlocking with the assistance of an auxiliary power .

Such, generic vehicle parking lock device is for example from DE 101 44 063 A1 , known. A vehicle parking lock device for an automatic transmission of a motor vehicle is disclosed with a locking ring arranged on a transmission shaft and a pivotably mounted parking lock pawl which engages in locking recesses of the locking ring when the device is in the locked state. Furthermore, the vehicle parking lock device has a likewise pivotably mounted selector lever which acts on a linkage which accommodates rollers at one end, with a first roller acting on a ramp contour on the back of the pawl facing away from the locking ring. The end of the linkage that receives the rollers is guided in an L-shaped or U-shaped guide plate, the guide plate having a substantially horizontally extending wall on which the second roller is supported when the pawl is pivoted. The guide plate has at least one side wall, the horizontally running wall and the at least one side wall being produced as separate sheet metal parts and connected to one another essentially at right angles. More parking lock devices of this type are in the CN 103 807 434 A and the DE 10 2017 127 213 A1 shown.

The parking pawl is often actuated by a linearly displaceable carriage, as shown in DE 10 2011 086 238 A1 the case is. The guide of the carriage is massive, complex and requires a relatively large amount of space.

It is therefore the object of the invention to at least reduce or completely eliminate the problems known from the prior art and to be able to provide a cost-effective and fail-safe vehicle parking lock device.

This object is achieved by a vehicle parking lock arrangement, in particular for use within a hybrid or all-electric vehicle drive train, comprising a housing element and a vehicle parking lock device, comprising an actuator, a parking lock wheel and a parking lock mechanism, the actuator interacting with the parking lock mechanism in such a way that the parking lock mechanism is of the actuator is movable to a park lock position in which the park pawl engages the park gear and thereby blocks rotation of the park gear, and is movable to a park release position in which the park pawl is disengaged from the park gear and the park gear is rotatable, wherein the parking lock mechanism is designed as a parking lock pivoting lever mechanism, in which the parking lock pawl is pivotably mounted on a pawl bolt, with the parking lock pivoting lever mechanism translating a translatory displacement comprises a movable carriage which interacts with a pawl guide surface of the parking pawl in such a way that the carriage contacts the pawl guide surface for transferring the parking pawl into its parking lock locked position and parking lock release position, and the carriage is supported in a translationally movable manner in a linear guide formed on the housing element.

The vehicle parking lock arrangement according to the invention can support these forces and moments on a housing element, for example a transmission, particularly when high forces and torques occur, such as can act on the parking lock pivoting lever mechanism when the parking lock pawl is rejected at high speeds. In this way, in particular, tilting of the translationally movable slide when high forces occur can be avoided and the operational reliability of the vehicle parking lock arrangement can be increased.

First, the individual elements of the claimed subject matter of the invention are explained in the order in which they are mentioned in the set of claims, and particularly preferred configurations of the subject matter of the invention are described below.

A vehicle parking lock device typically includes an actuator which acts on a parking lock mechanism for the purpose of locking the vehicle parking lock device, which then brings about a positive locking within the vehicle drive train to block the driven vehicle wheels.

Such actuators convert mechanical, hydraulic or electrical input variables into a mechanical movement. Although an actuator can in principle also be operated manually, externally powered actuators with an actuator drive have prevailed. An actuator comprises an actuator drive and preferably also an actuator mechanism, the actuator drive interacting with the actuator mechanism in such a way that a movement of the actuator drive results in a movement of the actuator mechanism. Depending on its actuator drive principle, an actuator can in particular be selected from the group of electromotive actuators, electromechanical actuators, hydraulic actuators, electrohydraulic actuators or electrochemical actuators.

The parking lock mechanism converts the movement applied by the actuator into a movement acting on the vehicle's drive train for the purpose of positive locking and blocking of the driven vehicle wheels.

The parking lock pawl is used to create a form-fitting, detachable connection between the parking lock mechanism and the vehicle drive train. In its locked position, the parking pawl engages in the vehicle drive train in a form-fitting manner, so that rotation of the driven vehicle wheels is blocked. In its release position, the parking pawl is spaced apart from the vehicle drive train, ie not in positive engagement with it, so that the driven vehicle wheels can rotate. For this purpose, for example, a corresponding parking lock wheel is formed within the vehicle drive train, in which the parking lock pawl engages in a form-fitting manner to secure the vehicle against unintentional rolling.

In a parking lock pivoting lever mechanism, the parking lock pawl can be pivoted between its locked position and its release position about a parking lock pawl bearing. In a parking lock pivoting lever mechanism, the movement applied by the actuator is converted into a movement acting on the drive train of the vehicle for the purpose of positive locking and blocking of the driven vehicle wheels by means of a parking lock pawl pivotably mounted in the parking lock pivoting lever mechanism. The parking lock pivoting lever mechanism can in particular comprise a parking lock pawl and a parking lock pawl bearing, the parking lock pawl being pivotably accommodated in the parking lock pawl bearing.

According to a preferred embodiment of the invention, it can be advantageous that the linear management is formed monolithically with the housing member.

Furthermore, it can be advantageous for the linear guide to be designed as a separate component which is connected to the housing element in a positive, non-positive and/or material connection in a fixed or detachable manner.

In a further development of the invention, it can also be preferred that the parking lock pivoting lever mechanism also has a cover element that is detachably fixed to the housing element and at least partially encloses the area of the parking lock pivoting lever mechanism opposite the cover element.

Furthermore, it can be advantageous that the parking lock pivoting lever mechanism has a support plate on which the carriage rests on the one hand and at least a section of the linear guide on the other hand.

According to a further advantageous embodiment of the invention, it can be preferred that the support plate is arranged on the side of the carriage facing away from the parking lock pawl.

Furthermore, it is also preferable that the linear guide is designed as a pocket into which the carriage can be inserted.

According to a preferred embodiment of the invention, it can be advantageous that the parking lock pivoting lever mechanism is designed as a normally closed mechanism.

Furthermore, it can be advantageous for the linear guide to be formed in or on a housing element belonging to a hybrid module. In a hybrid module, structural and functional elements of a hybridized drive train can be spatially and/or structurally combined and preconfigured, so that a hybrid module can be integrated in a particularly simple manner into a drive train of a motor vehicle. In particular, an electric motor and a clutch system, in particular with a separating clutch for coupling the electric motor into and/or decoupling the electric motor from the drive train, can be present in a hybrid module.

• PO: der Elektromotor ist vor der Brennkraftmaschine angeordnet und beispielsweise über einen Riemen mit der Brennkraftmaschine gekoppelt. Bei dieser Anordnung des Elektromotors wird dieser auch gelegentlich als Riemenstartergenerator (RSG) bezeichnet,
• P1: der Elektromotor ist direkt hinter der Brennkraftmaschine angeordnet. Die Anordnung des Elektromotors kann beispielsweise kurbelwellenfest vor der Anfahrkupplung erfolgen,
• P2: der Elektromotor ist zwischen einer häufig als KO bezeichneten Trennkupplung und der Anfahrkupplung aber vor dem Fahrzeuggetriebe im Antriebsstrang angeordnet,
• P3: der Elektromotor ist im Fahrzeuggetriebe und/oder der Getriebeausgangswelle angeordnet,
• P4: der Elektromotor ist an einer bestehenden oder separaten Fahrzeugachse angeordnet und
• P5: der Elektromotor ist am oder im Fahrzeugrad angeordnet, beispielsweise als Radnabenmotor.

A hybrid module can be divided into the following categories P0-P4 depending on the point of intervention of the electric motor in the drive train:

• PO: the electric motor is arranged in front of the internal combustion engine and is coupled to the internal combustion engine via a belt, for example. With this arrangement of the electric motor, it is also sometimes referred to as a belt starter generator (RSG),
• P1: the electric motor is located directly behind the internal combustion engine. The electric motor can be arranged, for example, on the crankshaft in front of the starting clutch,
• P2: the electric motor is located between a separating clutch, often referred to as a KO, and the starting clutch, but in front of the vehicle transmission in the drive train,
• P3: the electric motor is arranged in the vehicle transmission and/or the transmission output shaft,
• P4: the electric motor is arranged on an existing or separate vehicle axle and
• P5: the electric motor is arranged on or in the vehicle wheel, for example as a wheel hub motor.

The invention will be explained in more detail below with reference to figures without restricting the general inventive idea. The figures are only of a schematic nature and serve exclusively for understanding the invention. The same elements are provided with the same reference numbers. The different features of the various exemplary embodiments can also be freely combined with one another within what is technically feasible.

• 1 eine Fahrzeugparksperrenanordnung in einer schematischen Aufsicht,
• 2 eine Detaildarstellung einer Fahrzeugparksperrenanordnung im verbauten Zustand in einer schematischen Aufsicht,
• 3 eine Detaildarstellung einer Fahrzeugparksperrenanordnung im verbauten Zustand in einer schematischen Aufsicht,
• 4 eine erste Ausführungsform eines Gehäuseelements 3 in einer perspektivischen Ansicht,
• 5 eine zweite Ausführungsform eines Gehäuseelements 3 in einer perspektivischen Ansicht, und
• 6 ein Kraftfahrzeug mit einem hybriden Antriebsstrang in einer Blockschaltdarstellung.

Show it:

• 1 a vehicle parking lock arrangement in a schematic plan view,
• 2 a detailed representation of a vehicle parking lock arrangement in the installed state in a schematic plan view,
• 3 a detailed representation of a vehicle parking lock arrangement in the installed state in a schematic plan view,
• 4 a first embodiment of a housing element 3 in a perspective view,
• 5 a second embodiment of a housing element 3 in a perspective view, and
• 6 a motor vehicle with a hybrid drive train in a block diagram.

1 shows a vehicle parking lock arrangement 1 for use within a hybrid or fully electrically operated vehicle drive train 2, as exemplified in FIG 6 is shown.

The vehicle parking lock arrangement 1 comprises a housing element 3 and a vehicle parking lock device 4 which can be coupled to the housing element 3.

The vehicle parking lock device 4 comprises an actuator 5, a parking lock wheel 6 and a parking lock mechanism 7, the actuator 5 interacting with the parking lock mechanism 7 in such a way that the parking lock mechanism 7 can be moved by means of the actuator 5 into a parking lock locking position, in which the parking lock pawl 8 engages the parking lock wheel 6 engages and so blocks rotation of the parking gear 6, and is movable to a parking lock release position in which the parking pawl 8 is disengaged from the parking gear 6 and the parking gear 6 is rotatable in this operative position.

The parking lock mechanism 7 is designed as a parking lock pivoting lever mechanism 9 in which the parking lock pawl 8 is mounted pivotably on a pawl pin 10 . The pivoting movement of the parking pawl 8 is indicated by the arrow. The parking lock pivoting lever mechanism 9 also has a carriage 11 that can be displaced translationally by the actuator 5 against a spring force. This carriage 11 interacts with a pawl guide surface 12 of the parking lock pawl 8 in such a way that the carriage 11 contacts the pawl guide surface 12 for transferring the parking lock pawl 8 into its parking lock locked position and parking lock release position . For this purpose, two non-designated cylindrical rollers are rotatably arranged in the carriage, on which the pawl guide surface 12 rolls. The carriage 11 is supported in a linear guide 13 formed on the housing element 3 so that it can move in a translatory manner, which is shown in FIG 3 is indicated by the dashed lines. The linear guide 13 is monolithically formed with the housing member 3 .

The vehicle parking lock device 4 is thus integrated into the structure of the housing element 3 via the linear guide 13 so that the forces and moments acting on the vehicle parking lock device 4 can be transmitted directly to the structure of the housing element 3 .

The parking lock pivoting lever mechanism 9 also has a support plate 15, on the one hand the carriage 11 and on the other hand on the side facing away from the parking lock pawl 8 a portion of the linear guide 13 rests, which is clear from the representation of the 2 is evident.

Like in the 3 is shown, the parking lock pivoting lever mechanism 9 also has a cover element 14 that is detachably fixed to the housing element 3 and at least partially encloses the area of the parking lock pivoting lever mechanism 9 that is opposite the cover element 14 .

From the 4-5 it can be seen that the linear guide 13 is formed in or on a cover-like housing element 3 belonging to a hybrid module 16 . The linear guide 13 is designed here as a kind of pocket, into which the carriage 11 can be inserted from an axial mounting direction—in relation to the shafts (not shown) in the housing element 3 . The claw-like sections of the linear guide 13, along which the carriage 11 can be guided when the vehicle parking lock arrangement 1 is in operation, are clearly visible. The linear guide 13 has fastening openings for screwing on the cover element 14 .

The invention is not limited to the embodiments shown in the figures. The foregoing description is therefore not to be considered as limiting but as illustrative. The following patent claims are to be understood in such a way that a mentioned feature is present in at least one embodiment of the invention. This does not exclude the presence of other features. If the patent claims and the above description define 'first' and 'second' feature, this designation serves to distinguish between two similar features without establishing a ranking.

Reference List

1

vehicle parking lock assembly

2

vehicle powertrain

3

housing element

4

vehicle parking lock device

5

actuator

6

parking lock wheel

7

parking lock mechanism

8th

parking lock pawl

9

Parking lock swivel lever mechanism

10

latch bolt

11

Sleds

12

latch guide surface

13

linear guide

14

cover element

15

gusset

16

hybrid module

17

motor vehicle

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• DE 10144063 A1 [0006]
• CN 103807434A [0006]
• DE 102017127213 A1 [0006]
• DE 102011086238 A1 [0007]

Claims (9)

Vehicle parking lock arrangement (1), in particular for use within a hybrid or fully electrically operated vehicle drive train (2), comprising a housing element (3) and a vehicle parking lock device (4), comprising an actuator (5), a parking lock wheel (6) and a parking lock mechanism (7 ), wherein the actuator (5) interacts with the parking lock mechanism (7) in such a way that the parking lock mechanism (7) can be moved by means of the actuator (5) into a parking lock locking position in which the parking lock pawl (8) engages in the parking lock wheel (6) and thus locking rotation of the parking lock gear (6), and is movable to a parking lock release position in which the parking lock pawl (8) is disengaged from the parking lock gear (6) and the parking lock gear (6) is rotatable, the parking lock mechanism (7) being a Parking lock pivoting lever mechanism (9) is configured, in which the parking lock pawl (8) is mounted pivotably on a pawl bolt (10), the parking lock sc The pivoting lever mechanism (9) comprises a translationally displaceable carriage (11) which interacts with a pawl guide surface (12) of the parking lock pawl (8) in such a way that the carriage (11) uses the pawl guide surface (12) to transfer the parking lock pawl (8) into its parking lock locked position and Contacted parking lock release position, characterized in that the carriage (11) is supported in a translationally movable manner in a linear guide (13) formed on the housing element (3). Vehicle parking lock arrangement (1), after claim 1 , characterized in that the linear guide (13) is formed monolithically with the housing element (3). Vehicle parking lock arrangement (1), after claim 1 , characterized in that the linear guide (13) is designed as a separate component which is positively, non-positively and / or materially connected firmly or detachably to the housing element (3). Vehicle parking lock arrangement (1) according to one of the preceding claims, characterized in that the parking lock pivoting lever mechanism (9) also has a cover element (14) which is detachably fixed to the housing element (3) and the area of the parking lock pivoting lever mechanism ( 9) at least in sections. Vehicle parking lock arrangement (1) according to one of the preceding claims, characterized in that the parking lock pivoting lever mechanism (9) has a support plate (15) on which the slide (11) on the one hand and at least a section of the linear guide (13) on the other hand rests. Vehicle parking lock arrangement (1), after claim 5 , characterized in that the support plate (15) is arranged on the side of the carriage (11) facing away from the parking lock pawl (8). Vehicle parking lock arrangement (1) according to one of the preceding claims, characterized in that the parking lock pivoting lever mechanism (9) is designed as a normally closed mechanism. Vehicle parking lock arrangement (1) according to one of the preceding claims, characterized in that the linear guide (13) is formed in or on a housing element (3) belonging to a hybrid module (16). Vehicle parking lock arrangement (1) according to one of the preceding claims, characterized in that the linear guide (13) is designed as a pocket into which the carriage (11) can be inserted.

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