CN111022640B

CN111022640B - Parking system

Info

Publication number: CN111022640B
Application number: CN201911273586.8A
Authority: CN
Inventors: 白秀超; 刘君祺; 付超; 刘彦超; 顾振宇; 赵成福; 宁小彬
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2019-12-12
Filing date: 2019-12-12
Publication date: 2021-03-23
Anticipated expiration: 2039-12-12
Also published as: CN111022640A

Abstract

The invention relates to the technical field of vehicles and discloses a parking system. The parking system comprises a parking actuating mechanism, a parking locking mechanism and a hydraulic locking mechanism, wherein the parking locking mechanism comprises a parking gear and a parking pin, the parking gear is an internal gear, the parking actuating mechanism is arranged in the middle of the parking gear, the parking actuating mechanism is configured to drive the parking pin to be clamped into a tooth groove of the parking gear, or the parking pin is driven to be separated from the tooth groove of the parking gear so that the parking gear is switched between a P gear and a non-P gear, and the hydraulic locking mechanism is configured to enable the parking gear to be locked on the P gear or the non-P gear. Through setting up the parking gear into the internal gear, set up parking actuating mechanism in the middle part of internal gear, be favorable to realizing the modularization of this parking system, save space utilization, through setting up hydraulic pressure locking mechanism for keep off the parking gear at P or non-P and keep off the locking, guarantee the reliable parking of vehicle, guarantee the security of navigating mate and vehicle.

Description

Parking system

Technical Field

The invention relates to the technical field of vehicles, in particular to a parking system.

Background

An automatic transmission of an automobile is an automobile transmission capable of automatically changing gear transmission ratio in the driving process of the automobile, and a parking system is installed in the automatic transmission to realize the reliable locking function of the automobile on a flat road or a sloping road.

The existing parking system generally comprises a parking actuating mechanism and a parking locking mechanism, wherein the parking actuating mechanism can be a pure mechanical type and can be manually operated by a driver, or can be a motor or a hydraulic type, however, no matter what driving mode is adopted by the parking actuating mechanism, most of the parking locking mechanisms in the parking actuating mechanism are ratchet wheel and pawl structures, only the mechanisms for pushing the pawls to move are different, and the parking actuating mechanism is divided into a cam type, a pull rod pin type and a double-roller rolling type. Parking gear (ratchet) is the external gear among traditional parking locking mechanism, and the parking pawl is rotary part, and it is rotatory around parking pawl axle, and the parking pawl is used in the external gear, realizes the parking locking, and this structure space utilization is low, and the modularization degree is not high, and manufacturing cost is higher.

Disclosure of Invention

Based on the above, the invention aims to provide a parking system, which can improve the space utilization rate and the modularization degree and has higher production cost.

In order to achieve the purpose, the invention adopts the following technical scheme:

a parking system, comprising:

the parking locking mechanism comprises a parking gear and a parking pin, wherein the parking gear is an internal gear;

the parking actuating mechanism is arranged in the middle of the parking gear and is configured to drive the parking pin to be clamped into a tooth groove of the parking gear or drive the parking pin to be separated from the tooth groove of the parking gear so as to enable the parking gear to be switched between a P gear and a non-P gear;

a hydraulic lock mechanism configured to lock the parking gear in the P range or the non-P range.

As a preferred scheme of parking system, parking actuating mechanism includes procapsid and back casing, the procapsid with seted up the oil pocket between the back casing, be provided with the hydraulic fluid port on the procapsid, the hydraulic fluid port communicates in automotive transmission's hydraulic system, hydraulic system's hydraulic fluid can by the hydraulic fluid port flows in the oil pocket, in order to drive the parking round pin by break away from in the tooth's socket of parking gear.

As a preferable aspect of the parking system, the parking actuator further includes:

an arc-shaped groove is formed in one side, close to the front shell, of the rear shell, the push block is arranged in the arc-shaped groove and can move relative to the arc-shaped groove, one end of the arc-shaped groove is communicated with the oil cavity, and a notch is formed in the middle of the push block;

the push block spring is positioned at the other end of the arc-shaped groove, and two ends of the push block spring are respectively abutted against the push block and the groove bottom of the arc-shaped groove;

the parking pin is connected with the cam through the notches, and the cam spring are connected with each other and arranged in the notches, and the parking pin is abutted to the surface of the cam.

As a preferable aspect of the parking system, the hydraulic lock mechanism includes:

a solenoid valve provided on the front housing;

an upper lock pin provided on the push block, the upper lock pin being configured to be capable of engaging with the front housing when the parking gear is in the non-P range;

a lower locking pin disposed on the push block, the lower locking pin configured to be capable of being engaged with the front housing when the parking gear is in the P range.

As a preferable aspect of the parking system, the parking system further includes a shift position detection mechanism configured to detect shift position information of the parking gear.

As a preferable aspect of the parking system, the shift position detection mechanism includes:

one end of the gear magnet is arranged on the front shell, and the other end of the gear magnet is arranged on the push block;

a gear sensor configured to detect a position of the other end of the gear magnet and electrically connected to the solenoid valve.

As a preferable aspect of the parking system, the parking system further includes an emergency unlocking mechanism configured to manually actuate the parking pin to be unlocked from the inside of the parking gear, so that the parking gear is switched from the P range to the non-P range.

As a preferable aspect of the parking system, the emergency unlocking mechanism includes:

one end of the emergency unlocking arm is rotatably arranged on the front shell;

the unlocking pin is arranged on the cam, penetrates through the front shell and abuts against the other end of the emergency unlocking arm, and the emergency unlocking arm can drive the unlocking pin to drive the cam to rotate so as to enable the parking gear to be switched from a P gear to a non-P gear;

the elastic piece is arranged at the other end of the emergency unlocking arm and can be clamped with the front shell.

As a preferable aspect of the parking system, the parking lock mechanism further includes:

the parking pin is provided with a strip-shaped groove along the axis direction, the limiting pin penetrates through the strip-shaped groove, and two ends of the limiting pin are respectively connected with the front shell and the rear shell;

and the reset spring is arranged in the strip-shaped groove and is positioned above the limiting pin, and two ends of the reset spring are respectively abutted against the limiting pin and the groove bottom of the strip-shaped groove.

As a preferable scheme of the parking system, the parking locking mechanism further includes an anti-wear sleeve, and the anti-wear sleeve is sleeved on the parking pin.

The invention has the beneficial effects that:

the invention provides a parking system which comprises a parking actuating mechanism, a parking locking mechanism and a hydraulic locking mechanism, wherein the parking actuating mechanism is arranged to realize that a parking pin is clamped into a tooth groove of a parking gear to complete a parking function, or the parking pin is separated from the tooth groove of the parking gear to switch the parking gear between a P gear and a non-P gear, and the hydraulic locking mechanism is arranged to lock the parking gear on the P gear or the non-P gear, so that the reliable parking of a vehicle is ensured, and the safety of a driver and the vehicle is ensured. Through setting up the parking gear into the internal gear, set up the parking actuating mechanism in the middle part of internal gear, be favorable to realizing the modularization of this parking system, save space utilization.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

FIG. 1 is a schematic structural view of a parking system provided by the present invention from one perspective;

FIG. 2 is a schematic structural view of the parking system provided by the present invention from another perspective;

FIG. 3 is an exploded schematic view of the park system provided by the present invention;

FIG. 4 is a schematic diagram illustrating a state of the parking system in the P-range;

FIG. 5 is a schematic diagram illustrating a state of the parking system in a non-P range;

FIG. 6 is a cross-sectional view of the park system provided by the present invention in P-range;

FIG. 7 is a schematic diagram illustrating a first process of shifting the parking system from P-range to non-P-range according to the present invention;

FIG. 8 is a schematic diagram illustrating a second process of shifting the parking system from P-range to non-P-range according to the present invention;

FIG. 9 is a cross-sectional view of the park system provided by the present invention in a non-P range;

FIG. 10 is a schematic diagram illustrating the position of an emergency unlocking mechanism of the parking system in a non-P gear;

fig. 11 is a schematic position diagram of the emergency unlocking mechanism of the parking system in the P gear.

In the figure:

10-a first connector; 20-a second connector; 30-a positioning ring;

1-a parking actuator; 11-a front housing; 111-oil port; 112-an oil chamber; 113-a card slot; 12-a rear housing; 121-an arc-shaped groove; 122-a second avoidance hole; 13-a push block; 131-a notch; 132-a first receiving hole; 133-a second receiving hole; 14-a pusher spring; 15-a cam; 16-a cam spring; 17-a sealing gasket;

2-a parking lock mechanism; 21-a parking gear; 22-a parking pin; 221-a strip groove; 23-an antifriction sleeve; 24-a spacing pin; 25-a return spring;

3-an emergency unlocking mechanism; 31-emergency unlocking arm; 32-unlocking pin; 33-a spring plate;

4-a hydraulic locking mechanism; 41-electromagnetic valve; 42-upper locking pin; 43-an upper locking spring; 44-lower locking pin; 45-lower locking spring;

5-gear detection mechanism; 51-gear magnet; 52-Gear sensor.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

FIG. 1 is a schematic structural view of a parking system provided by the present invention from one perspective; FIG. 2 is a schematic structural view of the parking system provided by the present invention from another perspective; fig. 3 is an exploded schematic view of a parking system provided by the present invention. As shown in fig. 1 to 3, the present embodiment provides a parking system including a parking actuator 1, a parking lock mechanism 2, and a hydraulic lock mechanism 4, wherein the parking lock mechanism 2 includes a parking gear 21 and a parking pin 22, the parking gear 21 is an internal gear, the parking actuator 1 is disposed in the middle of the parking gear 21, the parking actuator 1 is configured to drive the parking pin 22 to be inserted into a tooth slot of the parking gear 21, or drive the parking pin 22 to be disengaged from the tooth slot of the parking gear 21 to switch the parking gear 21 between a P range and a non-P range, and the hydraulic lock mechanism 4 is configured to lock the parking gear 21 in the P range or the non-P range.

Preferably, one end of the parking pin 22 close to the parking gear 21 is provided with a taper structure to provide a guide for the parking pin 22 to be caught or separated from the tooth grooves of the parking gear 21, thereby facilitating the operation.

In the present exemplary embodiment, parking actuator 1 is fixed to a transmission of a motor vehicle. Preferably, parking gear 21 is fixed on the gear that becomes fixed drive ratio with the output shaft of automotive transmission through first connecting piece 10, and first connecting piece 10 specifically can be first bolt, and first bolt wears to locate in proper order in the connecting hole of parking gear 21 and the connecting hole of the gear that becomes fixed drive ratio with the output shaft of automotive transmission to realize stable connection between them, bolted connection has processing simply, easy dismounting's advantage.

Through setting up parking actuating mechanism 1, realize parking round pin 22 card in the tooth's socket of parking gear 21 in order to accomplish the parking function, perhaps break away from so that parking gear 21 switches between P fender and non-P fender by the tooth's socket of parking gear 21, through setting up hydraulic locking mechanism 4 for with parking gear 21 keep off or non-P fender locking, guarantee the reliable parking of vehicle, guarantee the security of navigating mate and vehicle. Through setting up parking gear 21 as the internal gear, set up parking actuating mechanism 1 in the middle part of internal gear, be favorable to realizing the modularization of this parking system, save space utilization.

Further, the parking actuator 1 includes a front housing 11 and a rear housing 12, an oil chamber 112 is opened between the front housing 11 and the rear housing 12, an oil port 111 is provided on the front housing 11, the oil port 111 is communicated with a hydraulic system of the automobile transmission, and hydraulic oil of the hydraulic system can flow into the oil chamber 112 through the oil port 111 to drive the parking pin 22 to be disengaged from the tooth slot of the parking gear 21.

Specifically, procapsid 11 and back casing 12 pass through second connecting piece 20 to be fixed on automotive transmission's casing, and second connecting piece 20 specifically can be the second bolt, and the second bolt wears to locate in the connecting hole on procapsid 11, back casing 12 and automotive transmission's the casing in proper order, realizes three's stable connection, and bolted connection has simple processing, easy dismounting's advantage. In this embodiment, after the operator can dismantle first bolt and second bolt, take off this parking system is whole to use on the derailleur of other vehicles, it is simple and convenient, be favorable to realizing this parking system's modularization, the adaptability is stronger. Preferably, in order to ensure the accuracy of the assembling position of the front case 11 and the rear case 12, a positioning ring 30 is provided on the rear case 12, and the positioning ring 30 is used for positioning when the front case 11 and the rear case 12 are mounted.

Preferably, a sealing gasket 17 is further disposed between the front case 11 and the rear case 12, and the sealing gasket 17 is used for sealing the oil chamber 112.

Further, parking actuating mechanism 1 still includes ejector pad 13, ejector pad spring 14, cam 15 and cam spring 16, one side that back casing 12 is close to procapsid 11 is provided with arc wall 121, ejector pad 13 sets up in arc wall 121 and can its motion relatively, the one end and the oil pocket 112 intercommunication of arc wall 121, the middle part of ejector pad 13 is provided with breach 13, ejector pad spring 14 is located the other end of arc wall 121, the both ends of ejector pad spring 14 butt respectively in the tank bottom of ejector pad 13 and arc wall 121, cam 15 and cam spring 16 interconnect, and all set up in the breach 131 of ejector pad 13, parking round pin 22 and cam 15's surface butt. The push block spring 14 and the cam spring 16 are both arc springs, and the radian of the push block spring 14 and the radian of the cam spring 16 are the same as that of the arc groove 121, so that the smoothness of movement of the push block spring 14 and the cam spring 16 is guaranteed.

Specifically, the front housing 11 is provided with a first avoidance hole, the rear housing 12 is provided with a second avoidance hole 122, the first avoidance hole and the second avoidance hole 122 are both of a semicircular structure, and after the front housing 11 and the rear housing 12 are connected, the first avoidance hole and the second avoidance hole 122 enclose the avoidance hole formed for the penetration of the parking pin 22, so that the upper surface of the parking pin 22 is always abutted to the outer peripheral surface of the cam 15.

Further, parking locking mechanism 2 still includes spacer pin 24 and reset spring 25, be provided with bar groove 221 along its axis direction on the parking round pin 22, the spacer pin 24 wears to locate the bar inslot 221, and the both ends of spacer pin 24 are connected procapsid 11 and back casing 12 respectively, the axis direction of spacer pin 24 is perpendicular with the axis direction of parking round pin 22, reset spring 25 sets up in bar inslot 221, and be located the top of spacer pin 24, reset spring 25's both ends respectively the butt in the tank bottom of spacer pin 24 and bar groove 221. The limit pin 24 is used for limiting the parking pin 22 in the moving process, and specifically, when the limit pin 24 abuts against the upper groove bottom or the lower groove bottom of the strip-shaped groove 221 on the parking pin 22, the parking pin 22 stops moving, so that the phenomenon that the parking effect is influenced due to the fact that the moving distance of the parking pin 22 is too large because the compression amount of the return spring 25 is too large is prevented.

In order to prevent the parking pin 22 from being repeatedly caught in and disengaged from the tooth grooves of the parking gear 21, the parking lock mechanism 2 further includes a wear-reducing sleeve 23, and the wear-reducing sleeve 23 is fitted over the parking pin 22. The wear-reducing sleeve 23 may specifically be a rubber sleeve. It can be understood that the wear-reducing sleeve 23 is further provided with a through hole for the limit pin 24 to pass through, the limit pin 24 is arranged in the through hole of the wear-reducing sleeve 23, and two ends of the limit pin are respectively connected to the front shell 11 and the rear shell 12.

FIG. 4 is a schematic diagram illustrating a state of the parking system in the P-range; fig. 5 is a schematic diagram illustrating a state of the parking system in the non-P range according to the present invention. As shown in fig. 4-5, when the parking system is in the P-gear, the push spring 14 and the cam spring 16 are in a relaxed state, neither compressed nor extended, and the parking pin 22 is clamped in the tooth groove of the parking gear 21, at this time, the return spring 25 is in a compressed state; when the parking system is in a non-P gear, the push block 13 pushes the push block spring 14 to be in a compressed state, the cam 15 pushes the cam spring 16 to be in a compressed state, and the parking pin 22 is disengaged from the tooth groove of the parking gear 21.

Further, as shown in fig. 1 to 3, the hydraulic lock mechanism 4 includes a solenoid valve 41, an upper lock pin 42, and a lower lock pin 44, the solenoid valve 41 is provided on the front housing 11, the upper lock pin 42 is provided on the push block 13, the upper lock pin 42 is configured to be engageable with the front housing 11 when the parking gear 21 is in the non-P range, the lower lock pin 44 is provided on the push block 13, and the lower lock pin 44 is configured to be engageable with the front housing 11 when the parking gear 21 is in the P range. Specifically, the front housing 11 is provided with a tapered hole, and when the parking gear 21 is in the non-P gear, the upper locking pin 42 can extend into the tapered hole on the front housing 11, so as to realize the clamping connection between the upper locking pin 42 and the front housing 11, thereby ensuring that the parking gear 21 is stable in the non-P gear; when the parking gear 21 is in the P gear, the lower locking pin 44 can extend into the tapered hole on the front housing 11, so that the lower locking pin 44 is clamped with the front housing 11, the parking gear 21 is ensured to be stabilized in the P gear, and the safety of vehicle parking is ensured.

Preferably, the upper and lower locking pins 42 and 44 are tapered pins, and tapered holes in the front housing 11 provide guidance for the upper and lower locking pins 42 and 44 to move in and out, so that the shift between the P-range and the non-P-range is smoother.

Preferably, the hydraulic locking mechanism 4 further includes an upper locking spring 43 and a lower locking spring 45, the first receiving hole 132 and the second receiving hole 133 are formed in the push block 13, the upper locking spring 43 is disposed in the first receiving hole 132, two ends of the upper locking spring 43 are respectively connected to the bottom of the first receiving hole 132 and the upper locking pin 42, and the upper locking spring 43 is used for driving the upper locking pin 42 to extend into the tapered hole of the front housing 11; the lower locking spring 45 is disposed in the second receiving hole 133, both ends of the lower locking spring 45 are connected to the bottom of the second receiving hole 133 and the lower locking pin 44, respectively, and the lower locking spring 45 is used to drive the lower locking pin 44 to extend into the tapered hole of the front housing 11.

Further, the parking system further comprises a gear detection mechanism 5, wherein the gear detection mechanism 5 is configured to detect gear information of the parking gear 21 so as to control the on/off of the electromagnetic valve 41 and reduce the requirements on the electromagnetic valve 41 and the hydraulic system.

Specifically, the gear detection mechanism 5 includes a gear magnet 51 and a gear sensor 52, the gear magnet 51 is a stitch type gear magnet 51, one end of the gear magnet 51 is fixed between the front housing 11 and the sealing gasket 17, a stitch of the gear magnet 51 is engaged with the push block 13, the stitch of the gear magnet 51 can rotate with the push block 13 around the center of the front housing 11, the gear sensor 52 is used for detecting the position of the gear magnet 51, the gear sensor 52 is electrically connected to the solenoid valve 41, and when the gear sensor 52 detects that the gear magnet 51 is in the P-shift position or the non-P-shift position, the solenoid valve 41 is de-energized.

FIG. 6 is a cross-sectional view of the park system provided by the present invention in P-range; FIG. 7 is a schematic diagram illustrating a first process of shifting the parking system from P-range to non-P-range according to the present invention; FIG. 8 is a schematic diagram illustrating a second process of shifting the parking system from P-range to non-P-range according to the present invention; fig. 9 is a sectional view of the parking system according to the present invention in a non-P range. The process of switching the parking system from the P range to the non-P range is sequentially shown from fig. 6 to 9, the process of switching the parking system from the non-P range to the P range is sequentially shown from fig. 9 to 6, and the switching process of the parking system between the P range and the non-P range is briefly described below with reference to fig. 4 to 9:

(1) the switching process from the P gear to the non-P gear comprises the following steps:

as shown in fig. 4 and 6, at this time, the parking system is in the P-range, no hydraulic oil is in the oil chamber 112, the solenoid valve 41 is not energized, the pusher spring 14 and the cam spring 16 are in the relaxed state, neither compression nor extension, the parking pin 22 is snapped into the tooth groove of the parking gear 21, the return spring 25 is in the compressed state, and the lower lock pin 44 is snapped into the tapered hole of the front housing 11.

When the driver issues a P-range off command, as shown in fig. 7, the solenoid valve 41 is energized, and the stem of the solenoid valve 41 pushes the lower lock pin 44 to move toward the side close to the rear housing 12, while the lower lock spring 45 is compressed until the lower lock pin 44 is completely disengaged from the tapered hole of the front housing 11.

As shown in fig. 5 and fig. 8-9, after the electromagnetic valve 41 is energized, hydraulic oil in a hydraulic system of an automobile transmission enters the oil chamber 112 from the oil port 111 and flows into the arc-shaped groove 121, the hydraulic oil pushes the push block 13 to rotate and compresses the push block spring 14, the push block 13 drives the cam 15 to rotate in the rotating process and compresses the cam spring 16, and the parking pin 22 is driven to move upwards under the restoring force of the return spring 25 along with the rotation of the cam 15, so that the parking pin 22 is disengaged from the tooth grooves of the parking gear 21, and the parking gear 21 releases the locked state.

Meanwhile, the gear magnet 51 rotates along with the push block 13 to reach a non-P gear position, and the gear sensor 52 detects that the position is correct, so that the electromagnetic valve 41 is controlled to be powered off, and the oil cavity 112 is depressurized. At this time, as shown in fig. 9, the upper lock pin 42 is located at the position of the tapered hole in the front housing 11, and the upper lock pin 42 is inserted into the tapered hole in the front housing 11 by the elastic restoring force of the upper lock spring 43, thereby completing the locking of the parking gear 21 at the non-P position.

(2) The switching process from the non-P gear to the P gear is as follows:

as shown in fig. 5 and 9, at this time, the parking system is in the non-P-range, no hydraulic oil is in the oil chamber 112, the solenoid valve 41 is not energized, the pusher spring 14 and the cam spring 16 are in the compressed state, the parking pin 22 is not engaged in the tooth groove of the parking gear 21, the return spring 25 is in the relaxed state, neither compression nor extension is generated, and the upper locking pin 42 is engaged in the tapered hole of the front housing 11.

When the driver issues a command to engage the P range, the solenoid valve 41 is energized, and as shown in fig. 8, the stem of the solenoid valve 41 pushes the upper lock pin 42 to move toward the side close to the rear case 12, and at the same time, the upper lock spring 43 is compressed until the upper lock pin 42 is completely disengaged from the tapered hole of the front case 11.

As shown in fig. 4 and 6 to 7, the push block 13 is pushed to rotate by the push block spring 14 under the action of the elastic restoring force, the cam spring 16 pushes the cam 15 to rotate under the action of the elastic restoring force, and along with the rotation of the cam 15, the surface of the cam 15 presses the parking pin 22, so that the parking pin 22 is clamped in the tooth groove of the parking gear 21, and the return spring 25 is compressed, so that the parking gear 21 is in a locked state.

Meanwhile, the gear magnet 51 rotates along with the push block 13 to reach the P-gear position, and the gear sensor 52 detects that the position is correct, so that the electromagnetic valve 41 is controlled to be powered off. At this time, the lower lock pin 44 is located at the position of the tapered hole on the front housing 11, and the lower lock pin 44 is inserted into the tapered hole on the front housing 11 by the elastic restoring force of the lower lock spring 45, thereby completing the locking of the parking gear 21 at the P-range position.

When the parking pin 22 is not correctly clamped into the tooth grooves of the parking gear 21 but clamped on the tooth tops of the parking gear 21, the cam spring 16 is compressed, the parking pin 22 is clamped between the cam 15 and the parking gear 21, at the moment, the parking system can realize the parking function differently, the vehicle can slide, once the vehicle slides, the parking gear 21 rotates along with the rotation of the cam, the cam spring 16 pushes the cam 15 to rotate, the cam 15 continuously presses the parking pin 22, and the parking pin 22 is clamped into the tooth grooves of the parking gear 21, so that the parking function is completed.

Further, the parking system provided by the embodiment further includes an emergency unlocking mechanism 3, and the emergency unlocking mechanism 3 is configured to enable the driver to manually complete the switching from the P gear to the non-P gear by using the emergency unlocking mechanism 3 when the hydraulic system or the solenoid valve 41 fails, so that the driver can timely send the vehicle to a repair shop for repair or facilitate the temporary vehicle transportation.

FIG. 10 is a schematic diagram illustrating the position of an emergency unlocking mechanism of the parking system in a non-P gear; fig. 11 is a schematic position diagram of the emergency unlocking mechanism of the parking system in the P gear. Specifically, as shown in fig. 10 to 11, the emergency unlocking mechanism 3 includes an emergency unlocking arm 31, an unlocking pin 32 and a spring plate 33, one end of the emergency unlocking arm 31 is rotatably disposed on the front housing 11, the unlocking pin 32 is disposed on the cam 15, the unlocking pin 32 passes through the front housing 11 and abuts against the other end of the emergency unlocking arm 31, the emergency unlocking arm 31 can drive the unlocking pin 32 to drive the cam 15 to rotate, so that the parking gear 21 is switched from the P-shift to the non-P-shift, the spring plate 33 is disposed at the other end of the emergency unlocking arm 31, a clamping groove 113 is disposed on the front housing 11, and the spring plate 33 can be clamped in the clamping groove 111 (shown in fig. 3).

When the electromagnetic valve 41 or the hydraulic system is out of order, the elastic sheet 33 is clamped in the clamping groove 113 on the front shell 11, and the elastic sheet 33 can be separated from the clamping groove 113 only under the action of external force, so that the emergency unlocking of the P gear is realized.

Specifically, when the electromagnetic valve 41 or the hydraulic system fails, the driver manually rotates the emergency unlocking arm 31 to disengage the elastic piece 33 from the clamping groove 113 of the front housing 11, and drives the unlocking pin 32 and the cam 15 to rotate in the rotating process, so that the parking pin 22 is disengaged from the tooth groove of the parking gear 21 under the elastic force of the return spring 25, and the manual emergency unlocking of the P gear is realized.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A parking system, comprising:

a parking lock mechanism (2) including a parking gear (21) and a parking pin (22), the parking gear (21) being an internal gear;

the parking actuating mechanism (1) is arranged in the middle of the parking gear (21), and the parking actuating mechanism (1) is configured to drive the parking pin (22) to be clamped into a tooth groove of the parking gear (21) or drive the parking pin (22) to be separated from the tooth groove of the parking gear (21) so as to enable the parking gear (21) to be switched between a P gear and a non-P gear;

a hydraulic lock mechanism (4) configured to lock the parking gear (21) in the P range or the non-P range;

the parking actuator (1) comprises:

the parking pin comprises a front shell (11) and a rear shell (12), an oil cavity (112) is formed between the front shell (11) and the rear shell (12), an oil port (111) is formed in the front shell (11), the oil port (111) is communicated with a hydraulic system of an automobile transmission, and hydraulic oil of the hydraulic system can flow into the oil cavity (112) from the oil port (111) so as to drive the parking pin (22) to be separated from the tooth grooves of the parking gear (21);

an arc-shaped groove (121) is formed in one side, close to the front shell (11), of the rear shell (12), the push block (13) is arranged in the arc-shaped groove (121) and can move relative to the arc-shaped groove, one end of the arc-shaped groove (121) is communicated with the oil cavity (112), and a notch (131) is formed in the middle of the push block (13);

the push block spring (14) is positioned at the other end of the arc-shaped groove (121), and two ends of the push block spring (14) are respectively abutted against the push block (13) and the groove bottom of the arc-shaped groove (121);

the parking pin comprises a cam (15) and a cam spring (16), wherein the cam (15) and the cam spring (16) are connected with each other and are arranged in the notch (131), and the parking pin (22) is abutted to the surface of the cam (15).

2. Parking system according to claim 1, wherein said hydraulic locking mechanism (4) comprises:

a solenoid valve (41) provided on the front case (11);

an upper lock pin (42) provided to the push block (13), the upper lock pin (42) being configured such that the upper lock pin (42) can be engaged with the front housing (11) when the parking gear (21) is in the non-P position;

a lower locking pin (44) provided on the push block (13), the lower locking pin (44) being configured such that the lower locking pin (44) can be engaged with the front housing (11) when the parking gear (21) is in the P range.

3. Parking system according to claim 2, further comprising a gear detection mechanism (5), said gear detection mechanism (5) being configured to detect gear information of said parking gear (21).

4. Parking system according to claim 3, characterized in that said gear detection means (5) comprise:

a gear magnet (51) having one end disposed on the front housing (11) and the other end disposed on the push block (13);

a shift position sensor (52) configured to detect a position of the other end of the shift position magnet (51) and electrically connected to the solenoid valve (41).

5. Parking system according to claim 1, further comprising an emergency unlocking mechanism (3) configured to manually actuate the parking pin (22) to unlock from within the parking gear wheel (21) so as to switch the parking gear wheel (21) from the P gear to the non-P gear.

6. Parking system according to claim 5, characterized in that said emergency unlocking mechanism (3) comprises:

an emergency release arm (31) one end of which is rotatably provided on the front case (11);

the unlocking pin (32) is arranged on the cam (15), the unlocking pin (32) penetrates through the front shell (11) and abuts against the other end of the emergency unlocking arm (31), and the emergency unlocking arm (31) can drive the unlocking pin (32) to drive the cam (15) to rotate so that the parking gear (21) is switched from a P gear to a non-P gear;

the elastic sheet (33) is arranged at the other end of the emergency unlocking arm (31), and the elastic sheet (33) can be clamped with the front shell (11).

7. The parking system according to claim 1, wherein the parking lock mechanism (2) further comprises:

the parking pin (22) is provided with a strip-shaped groove (221) along the axial direction of the parking pin, the limiting pin (24) penetrates through the strip-shaped groove (221), and two ends of the limiting pin (24) are respectively connected with the front shell (11) and the rear shell (12);

the reset spring (25) is arranged in the strip-shaped groove (221), the reset spring (25) is located above the limiting pin (24), and two ends of the reset spring (25) are respectively abutted to the limiting pin (24) and the groove bottom of the strip-shaped groove (221).

8. Parking system according to any of claims 1-7, wherein the parking lock (2) further comprises a wear-reducing sleeve (23), said wear-reducing sleeve (23) being fitted over the parking pin (22).