CN107725765B

CN107725765B - P keeps off parking mechanism and vehicle

Info

Publication number: CN107725765B
Application number: CN201710994800.3A
Authority: CN
Inventors: 赵勇钢; 赵春艳; 张克军
Original assignee: Beijing Electric Vehicle Co Ltd
Current assignee: Beijing Electric Vehicle Co Ltd
Priority date: 2017-10-23
Filing date: 2017-10-23
Publication date: 2020-06-12
Anticipated expiration: 2037-10-23
Also published as: CN107725765A

Abstract

The invention discloses a P-gear parking mechanism and a vehicle, wherein the P-gear parking mechanism comprises: a housing; a parking gear; a pawl pivotally mounted within the housing and spaced from the parking gear in an out-of-park condition, a side of the pawl facing away from the parking gear having a pawl working surface; the stop block is fixedly connected with the shell, and a stop block working surface of the stop block is positioned on one side of the pawl, which is far away from the parking gear; the parking gear locking mechanism comprises an actuating mechanism and a pull rod assembly, wherein the pull rod assembly is located between a pawl working surface and a stop block working surface, the actuating mechanism is connected with the pull rod assembly, and the pull rod assembly is suitable for stopping the stop block working surface and the pawl working surface so as to push the pawl to rotate to lock the parking gear. The P-gear parking mechanism has good parking stability and high reliability, and the movement tracks of the moving parts are basically concentrated on one plane, so that the volume of the mechanism can be reduced.

Description

P keeps off parking mechanism and vehicle

Technical Field

The invention belongs to the technical field of vehicle manufacturing, and particularly relates to a P-gear parking mechanism and a vehicle with the same.

Background

The P-gear parking locking device can safely park in a static or low-speed state of the vehicle, and prevent the vehicle from sliding on a slope. The P-gear parking device in the related art is dispersed in general parts, the moving directions of all moving parts are different, a three-dimensional east mechanism is formed, the arrangement is difficult, and the occupied space of a shell is large.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides the P-gear parking mechanism, the movement tracks of the moving parts of the P-gear parking mechanism are basically concentrated on one surface, and the volume of the mechanism can be reduced.

According to the embodiment of the invention, the P-gear parking mechanism comprises: a housing; a parking gear; a pawl pivotally mounted within the housing and spaced from the parking gear in an out-of-park condition, a side of the pawl facing away from the parking gear having a pawl working surface; the stop block is fixedly connected with the shell, and a stop block working surface of the stop block is positioned on one side of the pawl, which is far away from the parking gear; the parking gear locking mechanism comprises an actuating mechanism and a pull rod assembly, wherein the pull rod assembly is located between a pawl working surface and a stop block working surface, the actuating mechanism is connected with the pull rod assembly, and the pull rod assembly is suitable for stopping the stop block working surface and the pawl working surface so as to push the pawl to rotate to lock the parking gear.

According to the P-gear parking mechanism provided by the embodiment of the invention, the pull rod assembly is limited and guided by the stop block working surface and the pawl working surface, the motion stability of the pull rod assembly is good, the gear engaging parking stability and the reliability of the P-gear parking mechanism are good, the motion tracks of the motion parts are basically concentrated on one surface, and the size of the mechanism can be reduced.

According to the P-gear parking mechanism provided by one embodiment of the invention, the pawl working surface comprises a pawl non-parking limiting surface and a pawl parking limiting surface, and the distance from the pawl non-parking limiting surface to the parking gear is smaller than the distance from the pawl parking limiting surface to the parking gear; the stop block is provided with a stop block working surface, the stop block working surface comprises a stop block non-parking limiting surface and a stop block parking limiting surface, and the distance from the stop block non-parking limiting surface to the parking gear is greater than the distance from the stop block parking limiting surface to the parking gear.

According to the P-gear parking mechanism provided by one embodiment of the invention, the pawl working surface comprises a pawl transition surface, and the pawl transition surface is connected between the pawl non-parking limiting surface and the pawl parking limiting surface; the stop block working surface comprises a stop block transition surface, and the stop block transition surface is connected between the stop block non-parking limiting surface and the stop block parking limiting surface.

According to the P-gear parking mechanism provided by one embodiment of the invention, included angles between the pawl transition surface and the pawl non-parking limiting surface as well as between the pawl transition surface and the pawl parking limiting surface are both 100-160 degrees; the included angles of the stop block transition surface, the stop block non-parking limiting surface and the stop block parking limiting surface are both 100-160 degrees.

According to an embodiment of the invention, the P-gear parking mechanism comprises: the pull rod is connected with the actuating mechanism; the locking block is slidably arranged on the pull rod; the elastic piece is elastically connected between the pull rod and the locking block.

According to the P-gear parking mechanism provided by one embodiment of the invention, the locking block comprises a cylindrical section, a first circular platform section and a second circular platform section which are sequentially connected, and the taper of the first circular platform section is greater than that of the second circular platform section.

According to the P-gear parking mechanism provided by one embodiment of the invention, in a non-parking state, the cylindrical section is positioned between the pawl parking limiting surface and the stop parking limiting surface, and the second circular truncated cone section is positioned between the pawl non-parking limiting surface and the stop non-parking limiting surface; under the parking state, the second round section is located between the pawl parking limiting surface and the stop block parking limiting surface so as to push the pawl to rotate to lock the parking gear.

According to an embodiment of the present invention, the P range parking mechanism further includes: a drive shaft in dynamic coupling connection with the actuator; the cam plate is fixedly connected with the driving shaft, and the pull rod assembly is connected with the cam plate.

According to an embodiment of the present invention, the P range parking mechanism further includes: the spring, the spring with casing fixed connection, just the spring is equipped with the roller, the periphery of cam plate be equipped with be suitable for with roller complex parking locking groove and non-parking locking groove.

According to the P-gear parking mechanism provided by one embodiment of the invention, the periphery of the cam plate comprises an arc section, the circle center of the arc section is located on the axis of the driving shaft, and the parking locking groove and the non-parking locking groove are both V-shaped.

According to an embodiment of the present invention, the P range parking mechanism further includes: the torsion spring is sleeved on the pawl pivot shaft, the limiting end of the torsion spring abuts against the driving shaft, and the acting end of the torsion spring elastically abuts against the pawl so that the pawl is spaced from the parking gear in a normal state.

According to the P-gear parking mechanism of one embodiment of the invention, at least part of the cam plate and at least part of the pawl are overlapped in the axial direction of the drive shaft, one of the cam plate and the pawl is provided with a limit pin, the other is provided with a limit groove, and in a non-parking state, the limit pin extends into the limit groove to limit the rotation of the pawl.

According to the P-gear parking mechanism provided by one embodiment of the invention, the limiting groove comprises a locking section and a free section, the limiting pin extends into the locking section and is attached to the peripheral wall of the locking section in the non-parking state, and the limiting pin rotates to the free section and is spaced from the peripheral wall of the free section when the non-parking state is separated.

According to the P-gear parking mechanism provided by the embodiment of the invention, the limiting groove is a through hole type or a blind hole type.

According to the P-gear parking mechanism of one embodiment of the invention, the axis of the driving shaft, the axis of the parking gear and the pivot axis of the pawl are parallel.

According to the P-gear parking mechanism provided by the embodiment of the invention, the pawl is positioned between the driving shaft and the pull rod assembly.

The invention also provides a vehicle which is provided with the P-gear parking mechanism.

The vehicle and the above-mentioned P-gear parking mechanism have the same advantages as the prior art, and are not described herein again.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural diagram of a P-range parking mechanism in a non-parking state according to an embodiment of the invention;

FIG. 2 is a schematic structural diagram of a P-gear parking mechanism in a pre-parking state according to an embodiment of the invention;

FIG. 3 is a schematic structural diagram of a P-range parking mechanism in a parking state according to the embodiment of the invention;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

FIG. 5 is a schematic structural view of a cam plate and a drive shaft according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a drawbar assembly according to an embodiment of the invention;

fig. 7 is a schematic structural diagram of a pull rod and an end face stopper according to an embodiment of the invention.

Reference numerals:

the parking gear 1, the lock groove 14,

a pawl 2, a pawl non-parking limit surface 21, a pawl transition surface 22, a pawl parking limit surface 23, a locking tooth 24, a limit groove 25, a locking section 25a, a free section 25b, a pawl pivot shaft 26,

the torsion spring 3 is provided with a torsion spring,

a stop 4, a stop non-parking limit surface 41, a stop transition surface 42, a stop parking limit surface 43,

the movement of the actuator 51, the drive shaft 52,

the cam plate 6, the connecting hole 61, the parking lock groove 62, the non-parking lock groove 63, the stopper pin 64,

a pull rod 7, a guide section 71, a transition section 72, a connecting section 73, an end limiting block 74, an elastic piece 75,

a locking block 8, a cylindrical section 81, a first circular truncated cone section 82, a second circular truncated cone section 83,

leaf spring 9, roller 91.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The P-range parking mechanism according to an embodiment of the present invention, which can be applied to both a speed reducer for a pure electric vehicle and an automatic transmission for a fuel vehicle, will be described below with reference to fig. 1 to 7.

Example 1

As shown in fig. 1 to 3, a P-range parking mechanism according to an embodiment of the present invention includes: a housing (not shown), a parking gear 1, a pawl 2, a stop 4, an actuator 51 and a lever assembly.

The shell can be connected with the reducer box body, the parking gear 1 is connected with a driving force assembly of the whole vehicle, for example, the parking gear 1 can be fixedly connected with a main reducer gear wheel, the parking gear 1 can be provided with a locking groove 14, when the parking gear 1 is locked, power output can be cut off, and P-gear parking is achieved.

Pawl 2 is pivotally installed in the casing, and pawl 2 can be pivotally installed in the casing through pawl pivot axle 26, and pawl pivot axle 26 can be fixed connection with the casing, and pawl 2 is established outside pawl pivot axle 26 through the through-hole cover, and with pawl pivot axle 26 clearance fit, pawl 2 can be rectangular plate-like.

The pawl 2 and the parking gear 1 are arranged in a substantially coplanar mode, or the included angle between the normal line of the pawl 2 and the axis of the parking gear 1 is less than 10 degrees, the pawl 2 is provided with a locking tooth 24, the locking tooth 24 protrudes from one side of the pawl 2 facing the parking gear 1 to the direction close to the parking gear 1, when the pawl 2 rotates around a pawl pivot shaft 26 until the locking tooth 24 is clamped into the locking groove 14, the parking gear 1 can be locked, and P-gear parking is achieved.

The pawl 2 is spaced apart from the parking gear 1 in the non-parking state, and the pawl 2 does not interfere with the rotation of the parking gear 1. The P range parking mechanism may further include: and a reset member connected to the pawl 2 such that the pawl 2 is normally spaced apart from the parking gear 1. For example, the reset member may include a torsion spring 3, the torsion spring 3 is sleeved on the pawl pivot 26, the limit end of the torsion spring 3 presses against the driving shaft 52, and the acting end of the torsion spring 3 elastically presses against the pawl 2.

The stop 4 is fixedly connected with the housing, and the stop 4 is located on a side of the pawl 2 facing away from the parking gear 1, that is, the pawl 2 is located between the stop 4 and the parking gear 1, and the stop 4 is spaced apart from the pawl 2.

The pull rod assembly is located between the pawl 2 and the stop block 4, the pull rod assembly is used for pushing the pawl 2 to rotate around the pawl pivot shaft 26, the stop block 4 is used for limiting the pull rod assembly to move towards the direction departing from the pawl 2, and the pull rod assembly is clamped between the pawl 2 and the stop block 4, so that the movement stability of the pull rod assembly is higher, and the pawl 2 and the stop block 4 can also play a certain guiding role in the pull rod assembly.

The actuating mechanism 51 is used for inputting a gear engaging driving force, the actuating mechanism 51 is connected with the pull rod assembly, the actuating mechanism 51 can move the pull rod assembly by a preset stroke, the actuating mechanism 51 can be electric or manual, and automatic parking or unlocking can be realized when the actuating mechanism 51 is electric, for example, the actuating mechanism 51 comprises a motor; if the actuator 51 is manual, parking or unlocking can be performed by manual engagement, for example, if the actuator 51 is of a pull-cord or pull-rod 7 type.

The parking operation is input, the actuating mechanism 51 drives the pull rod assembly, the pull rod assembly is suitable for abutting against the stop block 4 to push the pawl 2 to rotate to the locking parking gear 1, the movement direction of the pull rod assembly is perpendicular to the pivot axis of the pawl 2, and the movement track of the pull rod assembly and the movement track of the pawl 2 can be perpendicular to the axis of the parking gear 1.

According to the P-gear parking mechanism provided by the embodiment of the invention, the motion of the pull rod assembly is limited and guided by the stop block 4, the P-gear parking mechanism is good in gear engaging and parking stability, the structural reliability of the P-gear parking mechanism is high, the motion tracks of the moving parts are basically concentrated on one plane, and the size of the mechanism can be reduced.

Example 2

The shell can be connected with the reducer box body, the parking gear 1 is connected with a driving force assembly of the whole vehicle, for example, the parking gear 1 can be fixedly connected with a main reducer gear wheel, and when the parking gear 1 is locked, power output can be cut off.

Pawl 2 is pivotally installed in the casing, and pawl 2 can be pivotally installed in the casing through pawl pivot axle 26, and pawl pivot axle 26 can be fixed connection with the casing, and pawl 2 is established outside pawl pivot axle 26 through the through-hole cover, and pawl 2 and pawl pivot axle 26 clearance fit, and pawl 2 can be rectangular plate-like.

The pawl 2 and the parking gear 1 are arranged in a substantially coplanar mode, or the included angle between the normal line of the pawl 2 and the axis of the parking gear 1 is less than 10 degrees, the pawl 2 is provided with a locking tooth 24, the locking tooth 24 protrudes from one side of the pawl 2 facing the parking gear 1 to the direction close to the parking gear 1, when the pawl 2 rotates around a pawl pivot shaft 26 until the locking tooth 24 is clamped into a locking groove 14 of the parking gear 1, the parking gear 1 can be locked, and P-gear parking is achieved.

The side of the pawl 2 facing away from the parking gear 1 has a pawl face, which may be a partial side edge of the pawl 2 facing away from the parking gear 1. Dog 4 has the dog working face, and the dog working face is located pawl 2 and deviates from one side of parking gear 1, for example digs the recess on massive dog 4, and the part of a lateral wall of recess can form the dog working face, and the diapire of recess can play spacing effect to the pull rod assembly, and especially the locking piece 8 of restriction pull rod assembly rocks along parking gear 1's axial.

The pawl working face and the stop block working face are arranged oppositely, the pull rod assembly is located between the pawl working face and the stop block working face, the pull rod assembly is used for pushing the pawl 2 to rotate around the pawl pivot shaft 26, the stop block working face is used for limiting the pull rod assembly to move towards the direction departing from the pawl working face, and the pull rod assembly is clamped between the pawl working face and the stop block working face.

The actuating mechanism 51 is used for inputting a gear engaging driving force, the actuating mechanism 51 is connected with the pull rod assembly, the actuating mechanism 51 can move the pull rod assembly by a preset stroke, the actuating mechanism 51 can be electric or manual, and automatic parking or unlocking can be realized when the actuating mechanism 51 is electric, for example, the actuating mechanism 51 comprises a motor; when the actuator 51 is manual, parking or unlocking can be performed by manually engaging gears, and the actuator 51 may be a pull-wire type or a pull-rod type.

The parking operation is input, the actuating mechanism 51 drives the pull rod assembly, the pull rod assembly is suitable for stopping against a stop working surface and a pawl working surface to push the pawl 2 to rotate to the locking parking gear 1, the movement direction of the pull rod assembly is perpendicular to the pivot axis of the pawl 2, and the movement track of the pull rod assembly and the movement track of the pawl 2 can be perpendicular to the axis of the parking gear 1.

Example 3

The actuator 51 is used for inputting a gear engaging driving force, the actuator 51 is connected with the pull rod assembly through a driving shaft 52, an input end of the driving shaft 52 is in power coupling connection with an output end of the actuator 51, an output end of the driving shaft 52 can be directly connected with the pull rod assembly, and an output end of the driving shaft 52 can be indirectly connected with the pull rod assembly.

The actuator 51 can rotate the driving shaft 52 by a predetermined angle, so as to move the lever assembly by a predetermined stroke, the actuator 51 can be electric or manual, and when the actuator 51 is electric, automatic parking or unlocking can be realized, for example, the actuator 51 includes a motor; when the actuator 51 is manual, parking or unlocking can be performed by manually engaging gears, and the actuator 51 may be a pull-wire type or a pull-rod type.

As shown in fig. 1 to 3, the pawl 2 is located between the driving shaft 52 and the lever assembly, so that the structure of the P-gear parking mechanism is compact and the occupied installation space is small.

According to the P-gear parking mechanism provided by the embodiment of the invention, the motion of the pull rod assembly is limited and guided by the stop block 4, the P-gear parking mechanism is good in gear engaging and parking stability, the structural reliability of the P-gear parking mechanism is high, the motion tracks of the motion parts are basically concentrated on one plane, the pawl 2 is positioned between the driving shaft 52 and the pull rod assembly, the structure of the P-gear parking mechanism is compact, and the occupied installation space is small.

Example 4

The pawl 2 and the parking gear 1 are arranged in a substantially coplanar mode, or an included angle between the normal line of the pawl 2 and the axis of the parking gear 1 is smaller than 10 degrees, the pawl 2 is provided with a locking tooth 24, the locking tooth 24 protrudes from one side of the pawl 2 facing the parking gear 1 to the direction close to the parking gear 1, when the pawl 2 rotates around a pawl pivot shaft 26 until the locking tooth 24 is clamped into a locking groove 14 of the parking gear 1, the parking gear 1 can be locked, and P-gear parking is achieved.

The actuator 51 is used for inputting a gear engaging driving force, the actuator 51 is connected with the pull rod assembly through the cam plate 6, and the cam plate 6 can be in a sector shape. The actuator 51 may rotate the cam plate 6 a predetermined angle to move the drawbar assembly a predetermined stroke.

The actuator 51 is an electric or manual actuator, and can be automatically parked or unlocked when the actuator 51 is an electric actuator, for example, when the actuator 51 is an electric motor, the actuator 51 can be manually parked or unlocked when the actuator 51 is a manual actuator, and the actuator 51 can be a pull-wire actuator or a pull-rod actuator.

As shown in fig. 1 to 3 and 5, one of the cam plate 6 and the pawl 2 is provided with a stopper pin 64, and the other of the cam plate 6 and the pawl 2 is provided with a stopper groove 25, and in the non-parking state, the stopper pin 64 extends into the stopper groove 25 to restrict the rotation of the pawl 2.

It can be understood that, in the non-parking state, the limit pin 64 extends into the limit groove 25 to lock the pawl 2 by the cam plate 6, and when the cam plate 6 does not rotate, the pawl 2 cannot rotate, so that the locking teeth 24 of the pawl 2 can be effectively prevented from falling into the locking groove 14 of the parking gear 1 under the bumpy road condition of the vehicle, and the mistaken gear engagement cannot occur; when the parking gear is required to be put into gear, the cam plate 6 rotates, the limiting pin 64 and the limiting groove 25 rotate relatively, so that the pawl 2 is unlocked, and the normal parking gear is not influenced.

According to the P-gear parking mechanism provided by the embodiment of the invention, the motion of the pull rod assembly is limited and guided by the stop block 4, the P-gear parking mechanism is good in gear engaging and parking stability, the structural reliability of the P-gear parking mechanism is high, and the wrong gear engaging can be prevented when a vehicle bumps by designing a locking structure.

Example 5

As shown in fig. 1 to 3, the drive shaft 52 is disposed parallel to the axis of the parking gear 1, so that the actuator 51 can be disposed on the side of the reduction gear, which is advantageous for optimizing the spatial arrangement of the entire vehicle.

According to the P-gear parking mechanism provided by the embodiment of the invention, through the limitation and the guide of the stop dog 4 on the movement of the pull rod assembly, the P-gear parking mechanism is good in gear engaging and parking stability, the structural reliability of the P-gear parking mechanism is high, the movement tracks of the moving parts are basically concentrated on one plane, the driving shaft 52 is arranged in parallel with the axis of the parking gear 1, the structure of the P-gear parking mechanism is compact, and the optimization of the spatial arrangement of the whole vehicle is facilitated.

Example 6

The pull rod assembly is located between the pawl 2 and the stopper 4, as shown in fig. 6, the pull rod assembly includes a pull rod 7, a lock block 8 and an elastic member 75, the lock block 8 is slidably mounted on the pull rod 7, and the elastic member 75 is elastically connected between the pull rod 7 and the lock block 8.

The locking block 8 comprises a cylindrical section 81, a first circular platform section 82 and a second circular platform section 83 which are connected in sequence, the upper bottom of the first circular platform section 82 is connected with the cylindrical section 81, the lower bottom of the first circular platform section 82 is connected with the upper bottom of the second circular platform section 83, and the second circular platform section 83, the first circular platform section 82 and the cylindrical section 81 are connected in sequence along the motion direction of the pull rod assembly during parking.

Referring to fig. 6, the axes of the cylindrical section 81, the first circular truncated cone section 82 and the second circular truncated cone section 83 coincide, the diameter of the cylindrical section 81 is the same as the diameter of the upper bottom of the first circular truncated cone section 82, the diameter of the lower bottom of the first circular truncated cone section 82 is the same as the diameter of the upper bottom of the second circular truncated cone section 83, and the taper of the first circular truncated cone section 82 is greater than that of the second circular truncated cone section 83.

As shown in fig. 1-3, lock block 8 is used to push pawl 2 to rotate around pawl pivot shaft 26, and stop 4 is used to limit lock block 8 from moving in a direction away from pawl 2, and lock block 8 is clamped between pawl 2 and stop 4, so that the motion stability of lock block 8 is higher, and pawl 2 and stop 4 can also play a certain role in guiding lock block 8.

The actuating mechanism 51 is used for inputting a gear engaging driving force, the actuating mechanism 51 is connected with the pull rod 7, the actuating mechanism 51 can drive the pull rod 7 to move for a preset stroke, the pull rod 7 drives the locking block 8 to move through the elastic piece 75, the moving direction of the pull rod 7 is perpendicular to the pivot axis of the pawl 2, and the moving track of the pull rod assembly and the moving track of the pawl 2 can be both perpendicular to the axis of the parking gear 1.

Inputting parking operation, the actuating mechanism 51 drives the pull rod 7 to drive the locking block 8 to abut against the stop block 4 and the pawl 2 through the elastic piece 75, and in a parking state, the second circular table section 83 abuts against the stop block 4 and the pawl 2 to push the pawl 2 to rotate to the locking parking gear 1, wherein in a non-parking state, the locking block 8 can be always clamped between the stop block 4 and the pawl 2 to prevent the stop block 4 from abutting against the pawl 2, so that the subsequent movement of the locking block 8 relative to the pawl 2 and the stop block 4 is facilitated, the first circular table section 82 with large taper can play a guiding role in the parking process, and the second circular table section 83 with small taper can play a certain guiding role in the parking process and can reduce driving torque required by unlocking in the unlocking process.

The actuator 51 is electrically or manually operated, and can be automatically parked or unlocked when the actuator 51 is electrically operated, and for example, when the actuator 51 is a motor, the actuator 51 can be manually parked or unlocked when the actuator 51 is manually operated, and the actuator 51 can be of a pull-wire type or a pull-rod 7 type.

According to the P-gear parking mechanism provided by the embodiment of the invention, through the limitation and the guide of the stop block 4 to the movement of the pull rod assembly and the design of the locking block 8 in the structural form, the P-gear parking mechanism is good in gear engaging and parking stability, convenient to unlock, high in structural reliability, compact in structure and small in occupied installation space, and the movement tracks of moving parts are basically concentrated on one plane.

In the description of the present specification, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples, for example, the technical features of the above embodiments 1 to 6 may be combined with each other to obtain a new embodiment without contrarily departing from the technical features of the two embodiments, and the combination manner is not limited to the combination of the technical features of the two embodiments, but may also be a common combination of the technical features of the multiple embodiments.

Further, the above embodiments 1 to 6 may further include the following technical features.

As shown in fig. 1 to 3, the P range parking mechanism may further include: the driving shaft 52 and the driving shaft 52 are coupled to the actuator 51, for example, when the actuator 51 is a motor, the driving shaft 52 and the motor shaft may be connected by a coupling, or the driving shaft 52 and the motor shaft may be connected by a spline structure.

In some preferred embodiments, referring to fig. 1-3, the axes of the driving shaft 52, the parking gear 1 and the pivot axis of the pawl 2 are parallel, so that the actuator 51 can be arranged on the side of the speed reducer, and the P-gear parking mechanism is compact in structure and beneficial to optimizing the spatial arrangement of the whole vehicle.

In some preferred embodiments, referring to fig. 1-3, the pawl 2 is located between the drive shaft 52 and the lever assembly, so that the P-range parking mechanism is compact and occupies a small installation space.

As shown in fig. 1 to 3, the P range parking mechanism may further include: the cam plate 6 and the cam plate 6 are fixedly connected with the driving shaft 52, for example, the cam plate 6 is sleeved outside the driving shaft 52 and is connected with the driving shaft 52 in a welding mode, the pull rod assembly is connected with the cam plate 6, for example, the pull rod 7 of the pull rod assembly is connected with the cam plate 6, and when the driving shaft 52 rotates, the cam plate 6 rotates along with the driving shaft 52 and drives the pull rod 7 to move.

As shown in fig. 1 to 3, the P range parking mechanism may further include: the plate spring 9, the plate spring 9 and the housing are fixedly connected, for example, the plate spring 9 can be fixedly connected with the housing through a threaded fastener, the plate spring 9 is provided with a roller 91, the roller 91 can be cylindrical, and the outer peripheral edge of the cam plate 6 is provided with a parking locking groove 62 and a non-parking locking groove 63, and the parking locking groove 62 and the non-parking locking groove 63 are suitable for being matched with the roller 91.

In the non-parking state, the roller 91 is in contact with the non-parking locking groove 63 and elastically presses the cam plate 6 to lock the cam plate 6 at the current position when the drive shaft 52 is not rotated, so that the P-gear parking mechanism is maintained at the P-gear engaged position; when parking is required, the cam plate 6 rotates, the roller 91 rolls along the edge of the cam plate 6, when the roller 91 rolls into the parking lock groove 62, the pawl 2 stops against the parking gear 1, and the roller 91 elastically presses the cam plate 6 to lock the cam plate 6 when the drive shaft 52 does not rotate.

Specifically, as shown in fig. 5, the parking lock groove 62 and the non-parking lock groove 63 may be both V-shaped, so that the roller 91 is easy to roll in and out, the outer peripheral edge of the cam plate 6 includes a circular arc section, and the center of the circular arc section is located on the axis of the drive shaft 52, for example, the cam plate 6 may be a sector plate.

In some preferred embodiments of the present invention, as shown in fig. 1 to 3 and 5, at least a part of the cam plate 6 and at least a part of the pawls 2 are arranged to overlap in the axial direction of the drive shaft 52, that is, a projection of the cam plate 6 in the axial direction of the drive shaft 52 and a projection of the pawls 2 in the axial direction of the drive shaft 52 have an overlapping region.

One of the cam plate 6 and the pawl 2 is provided with a limit pin 64, the other of the cam plate 6 and the pawl 2 is provided with a limit groove 25, and the limit groove 25 is a through hole type or a blind hole type. For example, the side of the cam plate 6 facing the pawl 2 is provided with a stopper pin 64 protruding toward the pawl 2, and the pawl 2 is provided with a stopper groove 25 opening toward the cam plate 6; alternatively, the side of the pawl 2 facing the cam plate 6 is provided with a stopper pin 64 protruding toward the cam plate 6, and the cam plate 6 is provided with a stopper groove 25 opening toward the pawl 2.

In the non-parking state, the stopper pin 64 protrudes into the stopper groove 25 to restrict the rotation of the pawl 2, and the stopper groove 25 extends in the rotation direction of the cam plate 6.

It can be understood that, in the non-parking state, the limit pin 64 extends into the limit groove 25 to lock the pawl 2 by the cam plate 6, and when the cam plate 6 does not rotate, the pawl 2 cannot rotate, so that the locking teeth 24 of the pawl 2 can be effectively prevented from falling into the locking grooves 14 of the parking gear 1 under bumpy road conditions, and the mistaken gear engagement cannot occur; when the parking gear is required to be put into gear, the cam plate 6 rotates, the limiting pin 64 and the limiting groove 25 rotate relatively, so that the pawl 2 is unlocked, and the normal parking gear is not influenced.

Specifically, as shown in fig. 5, the stopper groove 25 includes a locking section 25a and a free section 25b, in the non-parking state, the stopper pin 64 extends into the locking section 25a and fits to the peripheral wall of the locking section 25a, when the non-parking state is released, the stopper pin 64 rotates to the free section 25b and is spaced from the peripheral wall of the free section 25b, the stopper pin 64 is cylindrical, the locking section 25a is semicircular to better lock the stopper pin 64, the free section 25b is arc-shaped, and the diameter side of the locking section 25a is connected to the free section 25b, so that when the cam plate 6 rotates, unlocking can be conveniently performed.

Therefore, by designing the locking structure, the mistaken gear engagement can be effectively prevented when the vehicle jolts, and the number of parts is not increased.

In some preferred embodiments of the present invention, as shown in fig. 6, the drawbar assembly includes: pull rod 7, locking piece 8, elastic component 75.

Wherein the pull rod 7 is connected with the actuator 51, in particular, the pull rod 7 is connected with the cam plate 6, the locking block 8 is slidably mounted on the pull rod 7, the elastic member 75 is elastically connected between the pull rod 7 and the locking block 8, and in a free state, the elastic member 75 is in a pre-compression state, so that the locking block 8 is stopped against the end.

As shown in fig. 6 and 7, the pull rod 7 includes a guide section 71, a transition section 72, and a connection section 73 connected in sequence, wherein an axis of the guide section 71 is perpendicular to a pivot axis of the pawl 2, at least a portion of the transition section 72 is arc-shaped, an axis of the connection section 73 is perpendicular to an axis of the guide section 71, the elastic member 75 is a spring, the elastic member 75 is sleeved outside the guide section 71, one end of the guide section 71 connected to the transition section 72 has a fixing protrusion, one end of the elastic member 75 abuts against the fixing protrusion, and the other end of the elastic member 75 abuts against the locking block 8.

The guide section 71 is sleeved with the locking block 8 in a clearance fit mode, the cam plate 6 is provided with connecting holes, the connecting section 73 extends into the connecting holes, the connecting section 73 can be provided with two limiting protrusions, and the two limiting protrusions are spaced in the axial direction and the circumferential direction of the connecting section 73 and used for limiting the connecting section 73 when the connecting section 73 extends into the connecting holes and preventing the pull rod 7 from being separated from the connecting holes.

The tie rod 7 may further include: the end face limiting block 74 is arranged at one end of the guide section 71, which is far away from the transition section 72, and after the elastic piece 75 and the locking piece 8 are sleeved in the guide section 71, the end face limiting block 74 is welded with the guide section 71, so that the locking piece 8 and the elastic piece 75 are limited, and the elastic piece 75 is in a pre-compression state.

Specifically, as shown in fig. 6 and 7, the end face limiting block 74 may include a conical surface section and a cylindrical surface section, a lower bottom of the conical surface section is connected to an end of the cylindrical surface section far away from the locking block 8, and a diameter of the lower bottom of the conical surface section, a diameter of an end of the cylindrical surface section, and a diameter of an end of the locking block 8 facing the end face limiting block 74 are the same. This prevents the end face stopper 74 from affecting the operation of the lock piece 8.

As shown in fig. 6, the locking block 8 includes a cylindrical section 81, a first circular truncated cone section 82, and a second circular truncated cone section 83, which are connected in sequence, the upper bottom of the first circular truncated cone section 82 is connected to the cylindrical section 81, the lower bottom of the first circular truncated cone section 82 is connected to the upper bottom of the second circular truncated cone section 83, and the second circular truncated cone section 83, the first circular truncated cone section 82, and the cylindrical section 81 are connected in sequence along the moving direction of the drawbar assembly during parking.

Referring to fig. 6, the axes of the cylindrical section 81, the first circular truncated cone section 82 and the second circular truncated cone section 83 coincide, the diameter of the cylindrical section 81 is the same as the diameter of the upper bottom of the first circular truncated cone section 82, the diameter of the lower bottom of the first circular truncated cone section 82 is the same as the diameter of the upper bottom of the second circular truncated cone section 83, the taper of the first circular truncated cone section 82 is greater than that of the second circular truncated cone section 83, preferably, the taper of the first circular truncated cone section 82 is a, and the taper of the second circular truncated cone section 83 is b, which satisfies the following conditions: 1 ≦ a ≦ 1.8, 0.1 ≦ b ≦ 0.2, specifically, a ═ 1.45, and b ≦ 0.15.

Inputting parking operation, the actuating mechanism 51 drives the pull rod 7 to drive the locking block 8 to abut against the stop block 4 and the pawl 2 through the elastic piece 75, and in a parking state, the second circular table section 83 abuts against the stop block 4 and the pawl 2 to push the pawl 2 to rotate to the locking parking gear 1, wherein in a non-parking state, the cylindrical section 81 can be always clamped between the stop block 4 and the pawl 2 to prevent the stop block 4 from abutting against the pawl 2, so that the subsequent movement of the locking block 8 relative to the pawl 2 and the stop block 4 is facilitated, the first circular table section 82 with large taper can play a guiding role in the parking process, and the second circular table section 83 with small taper can play a certain guiding role in the parking process and can reduce driving torque required by unlocking in the unlocking process.

As shown in fig. 1 to 4, a side of the pawl 2 facing away from the parking gear 1 has a pawl working surface, which may be a partial side edge of the pawl 2 facing away from the parking gear 1. The pawl working face comprises a pawl non-parking limiting face 21 and a pawl parking limiting face 23, and the distance from the pawl non-parking limiting face 21 to the parking gear 1 is smaller than the distance from the pawl parking limiting face 23 to the parking gear 1. The working surface of the pawl further comprises a pawl transition surface 22, the pawl transition surface 22 is connected between the pawl non-parking limiting surface 21 and the pawl parking limiting surface 23, and included angles between the pawl transition surface 22 and the pawl non-parking limiting surface 21 and included angles between the pawl transition surface 22 and the pawl parking limiting surface 23 are 100-160 degrees.

Dog 4 has the dog working face, and the dog working face is located pawl 2 and deviates from one side of parking gear 1, digs the recess on blocky dog 4 for example, and the part of a lateral wall of recess can form the dog working face, and the diapire of recess can play spacing effect to the pull rod assembly, and especially the locking piece 8 of restriction pull rod assembly rocks along parking gear 1's axial. The stop working face comprises a stop non-parking limiting face 41 and a stop parking limiting face 43, and the distance from the stop non-parking limiting face 41 to the parking gear 1 is larger than the distance from the stop parking limiting face 43 to the parking gear 1. The stop working surface further comprises a stop transition surface 42, the stop transition surface 42 is connected between the stop non-parking limiting surface 41 and the stop parking limiting surface 43, and included angles between the stop transition surface 42 and the stop non-parking limiting surface 41 and included angles between the stop transition surface 42 and the stop parking limiting surface 43 are both 100-160 degrees.

The locking piece 8 is positioned between the pawl working surface and the stop block working surface, in a non-parking state, the cylindrical section 81 is positioned between the pawl parking limiting surface 23 and the stop block parking limiting surface 43, and the second circular table section 83 is positioned between the pawl non-parking limiting surface 21 and the stop block non-parking limiting surface 41; in the parking state, the second circular truncated cone section 83 is located between the pawl parking limit surface 23 and the stopper parking limit surface 43 to push the pawl 2 to rotate to the locking parking gear 1.

Through the stop block working surface and the pawl working surface in the structure form, the motion of the locking block 8 can be effectively guided, and the blocking fault in the gear engaging process is prevented.

The operation of the P range parking mechanism according to the embodiment of the present invention will be described with reference to fig. 1 to 3.

When the vehicle is in a normal driving state, as shown in fig. 1, the roller 91 of the plate spring 9 elastically presses against the non-parking locking groove 63 of the cam plate 6 to stop the rotation of the cam plate 6, the second circular truncated cone section 83 of the lock block 8 is located between the block non-parking limiting surface 41 of the block 4 and the non-parking contact surface of the pawl 2, the locking tooth 24 of the pawl 2 is located at a position far away from the locking groove 14 of the parking gear 1, and the limiting pin 64 is located at the locking section 25a of the locking groove 14 to resist the locking tooth 24 of the pawl 2 from falling into the locking groove 14 of the parking gear 1, so that the vehicle is prevented from being locked by mistake in a bumpy state.

When the vehicle is in a static state or a low-speed running state and needs to be parked, the actuating mechanism 51 receives a parking instruction sent by the controller, and drives the cam plate 6 to overcome a reverse torque generated by the plate spring 9 abutting against the non-parking locking groove 63 through the driving shaft 52 to synchronously rotate, at this time, the limit pin 64 leaves the locking section 25a of the locking groove 14 first, the cam plate 6 pushes the pull rod assembly through the connecting hole 61 matched with the pull rod 7, and then the locking block 8 and the elastic piece 75 are driven to move towards the direction of the stop parking limit surface 43, and at this time, the P-gear parking mechanism has the following two possible states.

State 1: if the locking groove 14 of the parking gear 1 is located at the position opposite to the locking tooth 24 of the pawl 2, because the initial elastic force of the elasticity on the pull rod assembly is larger than the resistance of the pawl 2 which is pressed against the locking block 8 due to the action of the torsion spring 3 and blocks the locking block 8 from continuing to move, so that the elastic member 75 can smoothly push the locking piece 8 without being compressed again, the first circular truncated cone section 82 of the locking piece 8 further pushes the pawl 2 to rotate towards the direction close to the locking groove 14, when the second circular truncated cone section 83 of the locking piece 8 moves between the stop parking limiting surface 43 and the pawl parking limiting surface 23, synchronously, the locking tooth 24 of the pawl 2 moves into the locking groove 14 of the parking gear 1, and synchronously, the parking locking groove 62 of the cam plate 6 rotates to the roller 91 position of the plate spring 9, the roller 91 is pressed against the bottom of the parking locking groove 62 of the cam plate 6, so that the cam plate 6 is held in the parking lock position shown in fig. 3 in the power-off state of the actuator 51 (e.g., motor).

State 2: as shown in fig. 2, if the locking groove 14 of the parking gear 1 is not aligned with the locking tooth 24 of the pawl 2, the first circular truncated cone section 82 of the locking block 8 also pushes the locking tooth 24 of the pawl 2 to approach the gear teeth of the parking gear 1, after the locking tooth 24 of the pawl 2 contacts the gear teeth of the parking gear 1, the pawl 2 cannot rotate continuously, the first circular truncated cone section 82 of the locking block 8 contacts the rounded corner of the edge of the pawl parking limit surface 23, the second circular truncated cone section 83 of the locking block 8 cannot move continuously, at this time, the actuator 51 does not rotate to a specified angle, the cam plate 6 is driven to rotate continuously, the elastic member 75 is compressed gradually, and when the actuator 51 rotates until the bottom of the parking locking groove 62 of the cam plate 6 contacts the roller 91 of the leaf spring 9, synchronously, the actuator 51 rotates to a set angle to cut off the power supply, and the torque generated by the roller 91 of the leaf spring 9 pressing the cam plate 6 is greater than the reaction torque of the elastic member 75 on the pull rod 7 and the cam plate 6, therefore, when the actuator 51 is powered off, the parking system can still be kept in the pre-parking state as shown in fig. 2, since the elastic member 75 is in the compressed state, if the vehicle has a landslide phenomenon, the wheel will drive the parking gear 1 to rotate, when the locking groove 14 of the parking gear 1 rotates to the position opposite to the locking tooth 24 of the pawl 2, the locking piece 8 will continue to push the pawl 2 to rotate under the thrust of the elastic member 75 to enable the locking tooth 24 to enter the locking groove 14, and the P-gear parking mechanism reaches the parking state as shown in fig. 3, thereby ensuring that the vehicle will not continue to slide a long distance.

It should be noted that, in the operation process of the above system, the limit pin 64 is always located in the free section 25b of the limit groove 25 after being separated from the locking section 25a of the limit groove 25, and does not collide with the edge of the limit groove 25, and the movement of the pawl 2 is not affected.

When the vehicle is started and needs to be unlocked, after the execution mechanism 51 receives an instruction sent by the controller, the cam plate 6 is driven to rotate in the direction opposite to the direction of parking, synchronously, the cam plate 6 drives the pull rod 7 to move, the end face limiting block 74 of the pull rod 7 pushes the locking block 8, so that the second circular table section 83 is separated from the position between the stop parking limiting surface 43 and the pawl parking limiting surface 23, the wall surface of the second circular table section 83 has a small angle, so that the driving torque needed in unlocking can be reduced, the locking teeth 24 of the pawl 2 leave the locking groove 14 of the parking gear 1 under the action of the component force which is generated by the contact of two side surfaces of the torsion spring 3 or the locking groove 14 and two side surfaces with included angles of the locking teeth 24 of the pawl 2, so that the locking teeth 24 of the pawl 2 are separated from the locking groove 14 of the parking gear 1, and stop rotating when the cam plate 6 continues to rotate until the bottom of the non-, the limit pin 64 synchronously moves to the locking section 25a of the limit groove 25 to lock the position of the pawl 2, so that the locking teeth 24 of the pawl 2 cannot mistakenly enter the locking groove 14 of the parking gear 1 even under the condition of severe bumpy road conditions, and the P-gear parking mechanism returns to the non-parking state shown in fig. 1.

The P-gear parking mechanism has the advantages of simple structure, simple part shape and high parking reliability, and can prevent the condition that the pawl 2 falls into the locking groove 14 of the parking gear 1 when a vehicle is in a driving state to cause the vehicle to be locked by mistake.

The invention also discloses a vehicle.

The vehicle according to the embodiment of the invention is provided with the P-gear parking mechanism of any one of the embodiments. The vehicle parking reliability is high according to the embodiment of the invention.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A P-gear parking mechanism is characterized by comprising:

a housing;

a parking gear;

a pawl pivotally mounted within the housing and spaced from the parking gear in an out-of-park condition, a side of the pawl facing away from the parking gear having a pawl working surface;

the stop block is fixedly connected with the shell, and a stop block working surface of the stop block is positioned on one side of the pawl, which is far away from the parking gear;

the pull rod assembly is positioned between the pawl working surface and the stop block working surface, the actuating mechanism is connected with the pull rod assembly, and the pull rod assembly is suitable for abutting against the stop block working surface and the pawl working surface so as to push the pawl to rotate to lock the parking gear; the distance from the pawl non-parking limiting surface to the parking gear is smaller than that from the pawl parking limiting surface to the parking gear; the stop block is provided with a stop block working surface, the stop block working surface comprises a stop block non-parking limiting surface and a stop block parking limiting surface, and the distance from the stop block non-parking limiting surface to the parking gear is larger than the distance from the stop block parking limiting surface to the parking gear;

the pull rod assembly is connected with the cam plate; one of the cam plate and the pawl is provided with a limiting pin, the other one of the cam plate and the pawl is provided with a limiting groove, and the limiting pin extends into the limiting groove to limit the rotation of the pawl in a non-parking state.

2. The P-gear parking mechanism according to claim 1, wherein the pawl working surface comprises a pawl transition surface connected between the pawl non-parking limit surface and the pawl parking limit surface; the stop block working surface comprises a stop block transition surface, and the stop block transition surface is connected between the stop block non-parking limiting surface and the stop block parking limiting surface.

3. The P-gear parking mechanism according to claim 2, wherein the included angles between the pawl transition surface and the pawl non-parking limiting surface and between the pawl transition surface and the pawl parking limiting surface are both 100-160 degrees; the included angles of the stop block transition surface, the stop block non-parking limiting surface and the stop block parking limiting surface are both 100-160 degrees.

4. The P-range parking mechanism according to claim 1, wherein the lever assembly comprises:

the pull rod is connected with the actuating mechanism;

the locking block is slidably arranged on the pull rod;

the elastic piece is elastically connected between the pull rod and the locking block.

5. The P-gear parking mechanism according to claim 4, wherein the locking piece comprises a cylindrical section, a first circular truncated cone section and a second circular truncated cone section which are connected in sequence, and the taper of the first circular truncated cone section is larger than that of the second circular truncated cone section.

6. The P-gear parking mechanism according to claim 5, wherein in a non-parking state, the cylindrical section is located between the pawl parking limit surface and the stop parking limit surface, and the second circular truncated cone section is located between the pawl non-parking limit surface and the stop non-parking limit surface; under the parking state, the second round section is located between the pawl parking limiting surface and the stop block parking limiting surface so as to push the pawl to rotate to lock the parking gear.

7. The P range parking mechanism of claim 1, wherein the driveshaft is in power coupling connection with the actuator.

8. The P range parking mechanism according to claim 7, further comprising: the spring, the spring with casing fixed connection, just the spring is equipped with the roller, the periphery of cam plate be equipped with be suitable for with roller complex parking locking groove and non-parking locking groove.

9. The P-range parking mechanism according to claim 8, wherein the outer periphery of the cam plate includes a circular arc section, the center of the circle is located on the axis of the drive shaft, and the parking lock groove and the non-parking lock groove are both V-shaped.

10. The P range parking mechanism according to claim 7, further comprising: the torsion spring is sleeved on the pawl pivot shaft, the limiting end of the torsion spring abuts against the driving shaft, and the acting end of the torsion spring elastically abuts against the pawl so that the pawl is spaced from the parking gear in a normal state.

11. The P range parking mechanism of claim 7, wherein at least a portion of the cam plate overlaps at least a portion of the pawl in an axial direction of the driveshaft.

12. The P-range parking mechanism according to claim 11, wherein the stopper groove includes a locking section and a free section, and in the non-parking state, the stopper pin extends into the locking section and abuts against a peripheral wall of the locking section, and in the non-parking state, the stopper pin rotates to the free section and is spaced apart from the peripheral wall of the free section.

13. The P-range parking mechanism according to claim 11, wherein the limiting groove is a through hole type or a blind hole type.

14. The P range parking mechanism of claim 7, wherein the axis of the drive shaft, the axis of the parking gear, and the pivot axis of the pawl are parallel.

15. The P-range parking mechanism of claim 7 wherein the pawl is located between the drive shaft and the lever assembly.

16. A vehicle characterized by having the P range parking mechanism according to any one of claims 1 to 15.