CN110778712B

CN110778712B - Parking executor and car

Info

Publication number: CN110778712B
Application number: CN201911058917.6A
Authority: CN
Inventors: 王恒; 郭振戈; 薛龙; 聂少文; 杜强
Original assignee: Dongfeng Motor Corp
Current assignee: Dongfeng Motor Corp
Priority date: 2019-11-01
Filing date: 2019-11-01
Publication date: 2021-09-03
Anticipated expiration: 2039-11-01
Also published as: CN110778712A

Abstract

The invention discloses a parking actuator and an automobile, wherein the parking actuator comprises a parking actuator shell, a parking shaft and a driving mechanism for driving the parking shaft to rotate around a central axis of the parking shaft are arranged in the parking actuator shell, a push rod coaxially arranged with the parking shaft is arranged on the shell in a circumferential limiting sliding fit manner, and the push rod is in threaded transmission connection with the parking shaft. The invention can convert the rotary motion of the parking axle into linear motion, thereby effectively improving the control precision of parking.

Description

Parking executor and car

Technical Field

The invention belongs to the technical field of automobile parking actuators, and particularly relates to a parking actuator and an automobile.

Background

In view of safety and other aspects, parking systems are configured on a plurality of vehicles and mainly comprise a manual parking system and an electronic parking system, the manual parking system needs large locking force during parking, the control difficulty is increased when the vehicles go up and down a slope, the vehicles cannot be connected with a whole vehicle network, complex control cannot be realized, electronic parking systems are gradually increased in the market, but most electronic parking actuators realize parking actions by controlling the rotation angle of a parking shaft, for example, in a CN201721433733.X parking mechanism and a vehicle, a motor is used for matching with the parking system, when a parking motor rotates, an actuating mechanism is driven to act to realize locking and unlocking of the parking system, but the parking actuators realize parking actions through rotation, the stroke is relatively small, the control precision is insufficient, when the parking motor is in an unlocking position or a locking position, the parking motor position can move under the action of external force, safety accidents are caused, and the vehicle cannot be unlocked and moved when the parking motor fails.

Disclosure of Invention

In order to solve the technical problem, the parking actuator comprises a parking actuator shell, a parking shaft and a driving mechanism used for driving the parking shaft to rotate around a central axis of the parking shaft are arranged in the parking actuator shell, a push rod coaxially arranged with the parking shaft is arranged on the shell in a sliding fit manner in a circumferential limiting manner, and the push rod is in threaded transmission connection with the parking shaft.

In a preferred embodiment of the present invention, the push rod is provided with a limiting end surface for preventing the push rod from rotating around its central axis, and the parking actuator housing is provided with a push rod mounting hole for mounting the push rod.

In a preferred embodiment of the present invention, the push rod portion is located outside the parking actuator housing, and the lead angle of the push rod to the parking axle upper threaded section is constant.

In a preferred embodiment of the present invention, a sensing and monitoring assembly for monitoring the position of the push rod is further disposed in the parking actuator housing.

In a preferred embodiment of the present invention, the sensing and monitoring assembly includes a worm gear, a worm, a polarized magnetic ring, and a hall element, the worm is fixedly connected to the parking shaft, an axis of the worm gear is perpendicular to an axis of the worm, the polarized magnetic ring is disposed on the worm gear, and the hall element is fixedly connected to the parking actuator casing and located above the polarized magnetic ring.

In a preferred embodiment of the present invention, the driving mechanism includes a motor, a driving gear and a driven gear, the driving gear is fixedly connected to a motor shaft of the motor, the driven gear is fixedly connected to the parking axle, and the driving gear and the driven gear are in meshing transmission.

In a preferred embodiment of the present invention, the motor is supported in the parking actuator housing through a bearing seat, a manual unlocking pin capable of driving the motor shaft to rotate is connected to the rear end of the motor, and an openable end cover is disposed on the parking actuator housing at a position corresponding to the manual unlocking pin.

In a preferred embodiment of the invention, a controller and a CAN communication interface are provided in the parking actuator housing, which controller integrates diagnostic functions.

In a preferred embodiment of the invention, the parking actuator housing is provided with a bolt hole for connecting a transmission housing.

The invention also discloses an automobile which uses the parking actuator.

The invention has the beneficial effects that: the parking actuator is simple in structure and convenient to use, the push rod coaxially arranged with the parking shaft is additionally arranged on the existing parking actuator shell, and meanwhile, the push rod is in threaded transmission connection with the parking shaft and is ensured not to rotate around the axis of the push rod, so that the rotary motion of the parking shaft is converted into linear motion, and the stroke and the control of the parking actuator can be more accurately adjusted (the accuracy adjustment in the prior art is controlled by the rotation angle of the parking shaft, so that the accuracy is inevitably inaccurate); furthermore, the sensing monitoring assembly is added, so that the working state of the parking mechanism can be fed back in real time, and the safety and the stability of parking are improved; furthermore, the manual unlocking pin is added on the motor, so that the parking actuator or the whole vehicle network fails to control the parking actuator to execute the unlocking action, and the parking actuator or the whole vehicle network can be unlocked manually; further, the thread angle between the push rod and the parking shaft is designed to be a fixed value, so that the parking actuator has a self-locking function, and the parking actuator is ensured not to move when being interfered by external force.

Drawings

Fig. 1 is a schematic structural diagram of a parking actuator according to an embodiment of the invention;

FIG. 2 is a schematic structural diagram of a parking actuator according to an embodiment of the present invention;

FIG. 3 is a schematic illustration of a locked state of a parking actuator according to an embodiment of the present invention;

FIG. 4 is a schematic illustration of an unlocked state of a parking actuator according to an embodiment of the present invention;

FIG. 5 shows a special structure of the parking actuator housing connected to the push rod;

FIG. 6 is a front view of a parking actuator sensing and monitoring assembly;

FIG. 7 is a side view of a parking actuator sensing and monitoring assembly;

in the figure: 1-a parking actuator housing; 2, a motor; 3-a parking axle; 4-a push rod; 5-a driven gear; 6-a driving gear; 7-manual unlocking pin; 8-a sensing monitoring component; 9-a controller; 10-CAN communication interface; 11-a push rod mounting hole; 12-opening the rear end of the shell of the parking actuator; 13-O-ring; 14-a first bolt hole; 15-a second bolt hole; 16-third bolt hole; 17-end cap; 21-a motor shaft; 31-external threads; 41-internal thread; 42-a limit end face; 81-worm; 82-a worm gear; 83-polarizing magnetic ring; 84-hall element.

Detailed Description

Embodiments of the present invention will be described in detail below, it should be noted that the embodiments described below with reference to the accompanying drawings are only exemplary and are only used for explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the terms "central," "lateral," "longitudinal," "up," "down," "left," "right," "front," "back," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the relevant components must have a particular orientation and are not to be considered as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, "a plurality" means two or more unless otherwise specified.

In the description of the invention it is to be noted that, unless otherwise explicitly stated or specified, the terms "mounted", "connected" and "connected" are to be understood broadly, e.g. as a fixed connection, a detachable connection or an integral connection; mechanical connection or electrical connection can be realized; they may be connected directly or indirectly through an intermediate medium, or they may be connected internally to the two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.

The invention will be described in detail with reference to the following description of specific embodiments with reference to the accompanying drawings. As shown in fig. 1, a parking actuator according to one embodiment of the present invention includes: the parking brake device comprises a parking actuator shell 1, a motor 2, a motor shaft 21, a parking shaft 3, a push rod 4, a manual unlocking pin 7, a sensing monitoring assembly 8, a controller 9 and a CAN communication interface 10 which are arranged in the parking actuator shell 1, wherein the motor 2 and the parking shaft 3 are both arranged in the parking actuator shell 1 through bearing seats, the motor shaft 21 is fixedly connected with the motor 2, the front end of the motor shaft 21 is connected with a driving gear 6, the rear end of the motor shaft 21 is connected with the manual unlocking pin 7, the rear end of the parking shaft 3 is connected with a driven gear 5, the driving gear 6 is meshed with the driven gear 5, the front end of the parking shaft 3 is provided with an external thread structure 31, the front end of the push rod 4 extends out of the shell of the parking actuator, the sensing and monitoring assembly 8 is arranged close to the driven gear 5, the controller 9 is arranged at a proper position in the shell 1 of the parking actuator, and the CAN communication interface 10 is arranged close to the controller 9.

When the parking mechanism is in the locking position, push rod 4 withdraws promptly, and sensing monitoring subassembly 8 feeds back the locking position, sends this signal to whole car network through the CAN communication, confirms that the vehicle is in P shelves, simultaneously because the screw thread on push rod 4 and the parking axle 3 possesses self-locking function, CAN ensure that parking motor 2 does not take place to remove when receiving external force interference.

When a driver tries to unlock a P gear, the parking actuator receives an unlocking command through the CAN interface 10, the controller 9 judges whether the unlocking condition is met, if the unlocking condition is met, the controller 9 controls the motor 2 to rotate, the parking shaft 3 is driven to move through the driving gear 6 and the driven gear 5, the inner thread and the outer thread are meshed to rotate, the push rod 4 is limited by the parking actuator shell 1 and cannot rotate and CAN only be pushed out outwards along the parking shaft 3, meanwhile, the parking shaft 3 drives the worm 81 to rotate, the worm 81 is meshed with the worm wheel 82 to drive the polarized magnetic ring 83 to rotate, the Hall element 84 records position information, after the parking mechanism reaches the unlocking position, the sensing monitoring assembly 8 sends a relevant signal to the controller 9, after the controller 9 judges that the unlocking state is sent to a whole vehicle network through the CAN interface 10, the vehicle is judged to be in the unlocking state, and simultaneously, as the push rod 4 and the threads on the parking shaft 3 have the self-locking function, the parking actuator can be ensured not to move when being disturbed by external force.

When a driver tries to engage in a P gear, a parking actuator receives a locking command through a CAN interface 10, a controller 9 judges whether a locking condition is met, if the locking condition is met, the controller 9 controls a motor 2 to rotate, a parking shaft 3 is driven to move through a driving gear 6 and a driven gear 5, internal and external threads are meshed to rotate, a push rod 4 is limited by a parking actuator shell 1 and cannot rotate and CAN only retract inwards along the parking shaft 3, meanwhile, the parking shaft 3 drives a worm 81 to rotate, the worm 81 is meshed with a worm wheel 82 to drive a polarized magnetic ring 83 to rotate, a Hall element 84 records position information, after a parking mechanism reaches a locking position, a sensing monitoring assembly 8 sends a relevant signal to the controller 9, after the controller 9 judges, the locking state is sent to a whole vehicle network through the CAN interface 10, the vehicle is judged to be in the locking state, and meanwhile, the push rod 4 and threads on the parking shaft 3 have a self-locking function, the parking actuator can be ensured not to move when being disturbed by external force.

When the parking actuator or the whole vehicle network breaks down and the parking actuator cannot be controlled to execute unlocking action, the unlocking shaft 7 can be rotated through the tail manual unlocking mechanism to drive the motor 2 to rotate, the parking shaft 3 is driven to move through the driving gear 6 and the driven gear 5, the inner thread and the outer thread are meshed to rotate, the push rod 4 is limited by the guide groove of the parking mechanism shell and cannot rotate, the push rod can only be pushed out outwards along the axial direction to unlock the parking mechanism, and the vehicle can be manually unlocked through the method so as to move and move.

Claims

1. The utility model provides a parking executor, includes parking executor casing (1), be provided with in parking executor casing (1) and be used for driving parking axle (3) are around the actuating mechanism of self axis gyration, its characterized in that: a push rod (4) which is coaxially arranged with the parking axle (3) is arranged on the parking actuator shell (1) in a sliding fit manner in a circumferential limiting manner, and the push rod (4) is in threaded transmission connection with the parking axle (3); the sensing monitoring assembly (8) comprises a worm wheel (82), a worm (81), a polarized magnetic ring (83) and a Hall element (84), the worm (81) is fixedly connected with the parking axle (3), the axis of the worm wheel (82) is perpendicular to the axis of the worm (81), the polarized magnetic ring (83) is arranged on the worm wheel (82), and the Hall element (84) is fixedly connected with the parking actuator shell (1) and is positioned above the polarized magnetic ring (83); a controller (9) with an integrated control and diagnosis function and a CAN communication interface (10) are arranged in the parking actuator shell (1);

when a driver tries to unlock a P gear, the parking actuator receives an unlocking command through the CAN communication interface (10), the controller (9) judges whether the unlocking condition is met, if the unlocking condition is met, the controller (9) controls the motor (2) to rotate, the parking shaft (3) is driven to move through the driving gear (6) and the driven gear (5), the inner thread and the outer thread are meshed and rotate, the push rod (4) is limited by the parking actuator shell (1) and cannot rotate and CAN only be pushed out outwards along the parking shaft (3), meanwhile, the parking shaft (3) drives the worm (81) to rotate, the worm (81) is meshed with the worm wheel (82) to drive the polarized magnetic ring (83) to rotate, the Hall element (84) records position information, after the parking mechanism reaches the unlocking position, the sensing monitoring assembly (8) sends a relevant signal to the controller (9), and after the controller (9) judges, the unlocking state is sent to the whole vehicle network through the CAN interface (10), determining that the vehicle is in an unlocked state;

when a driver tries to engage in a P gear, a parking actuator receives a locking command through a CAN interface (10), a controller (9) judges whether a locking condition is met, if the locking condition is met, the controller (9) controls a motor (2) to rotate, a parking axle (3) is driven to move through a driving gear (6) and a driven gear (5), internal and external threads are meshed and rotate, a push rod (4) is limited by a parking actuator shell (1) and cannot rotate and CAN only retract inwards along the parking axle (3), meanwhile, the parking axle (3) drives a worm (81) to rotate, the worm (81) is meshed with a worm wheel (82) to drive a polarized magnetic ring (83) to rotate, a Hall element (84) records position information, after the parking mechanism reaches a locking position, a sensing monitoring assembly (8) sends a related signal to the controller (9), and after the controller (9) judges, a locking state is sent to a whole vehicle network through the CAN interface (10), it is determined that the vehicle is in the locked state.

2. A parking actuator as claimed in claim 1, characterized in that: the parking actuator is characterized in that a limiting end face used for preventing the parking actuator from rotating around the central axis of the parking actuator is arranged on the push rod (4), and a push rod mounting hole (11) used for mounting the push rod (4) is formed in the parking actuator shell (1).

3. A parking actuator as claimed in claim 1, characterized in that: the push rod (4) is partially positioned outside the parking actuator shell (1), and the thread lead angle of the push rod (4) and the upper thread section of the parking axle (3) is a fixed value.

4. A parking actuator as claimed in claim 1, characterized in that: and a sensing monitoring assembly (8) for monitoring the position of the push rod (4) is further arranged in the parking actuator shell (1).

5. A parking actuator as claimed in claim 1, characterized in that: actuating mechanism includes motor (2), driving gear (6) and driven gear (5), the rigid coupling has on motor shaft (21) of motor (2) driving gear (6), the rigid coupling has on parking axle (3) driven gear (5), driving gear (6) with driven gear (5) meshing transmission.

6. A parking actuator according to claim 5, wherein: the parking actuator is characterized in that the motor (2) is supported in the parking actuator shell (1) through a bearing seat, the rear end of the motor (2) is connected with a manual unlocking pin (7) capable of driving the motor shaft (21) to rotate, and an end cover (17) capable of being opened and closed is arranged at the position, corresponding to the manual unlocking pin (7), of the parking actuator shell (1).

7. A parking actuator as claimed in claim 1, characterized in that: the parking actuator shell (1) is provided with a bolt hole used for connecting a gearbox shell.

8. An automobile, characterized in that: which uses a parking actuator according to any of claims 1-7.