CN110425278B - Hydraulic parking execution assembly and transmission - Google Patents
Hydraulic parking execution assembly and transmission Download PDFInfo
- Publication number
- CN110425278B CN110425278B CN201910798197.0A CN201910798197A CN110425278B CN 110425278 B CN110425278 B CN 110425278B CN 201910798197 A CN201910798197 A CN 201910798197A CN 110425278 B CN110425278 B CN 110425278B
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- movable module
- stroke
- parking
- pressing mechanism
- inner cavity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H63/34—Locking or disabling mechanisms
- F16H63/3416—Parking lock mechanisms or brakes in the transmission
- F16H63/3483—Parking lock mechanisms or brakes in the transmission with hydraulic actuating means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H63/34—Locking or disabling mechanisms
- F16H63/3416—Parking lock mechanisms or brakes in the transmission
- F16H63/3458—Parking lock mechanisms or brakes in the transmission with electric actuating means, e.g. shift by wire
- F16H63/3475—Parking lock mechanisms or brakes in the transmission with electric actuating means, e.g. shift by wire using solenoids
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear-Shifting Mechanisms (AREA)
- Braking Arrangements (AREA)
Abstract
The invention provides a hydraulic parking execution assembly and a transmission, and relates to the field of vehicles. The hydraulic parking actuating assembly comprises a shell, a movable module, an actuating rod and a pressing mechanism. The housing defines an interior chamber into and out of which fluid may enter. The movable module is arranged along the axial direction of the inner cavity and movably extends out of/retracts into the inner cavity under the action of fluid pressure, and a limiting part is arranged on the movable module. The actuating lever is connected with the movable module and is driven by the movable module when moving to switch between a parking state and a driving state. The pressing mechanism has a high stroke and a low stroke, and is configured to be pressed by the movable module when extending out of the inner cavity so as to switch between the high stroke and the low stroke, wherein the movable module is in the low stroke when extending out of the inner cavity, and the actuating rod is in the parking state. When the pressing mechanism is in a high-position stroke, the pressing mechanism is matched with the limiting part so that the actuating rod is in a driving state. The invention has simple structure design, small occupied space and difficult failure.
Description
Technical Field
The invention relates to the field of vehicles, in particular to a hydraulic parking execution assembly and a transmission.
Background
The parking mechanism is an indispensable or key part in an automatic transmission of an automobile, and is continuously controlled by a transmission gear shift lever for many years. With the development of computer electric control technology, some automobile manufacturers have adopted an electric control parking mechanism in recent years. Fig. 1 is a schematic diagram of an electro-hydraulic parking mechanism in the prior art. When the parking device is parked, the electromagnetic proportional valve is unloaded, the electromagnet is electrified, the lock plunger is sucked out of the piston positioning groove, and the piston and the parking actuating rod are pushed to the parking position by the spring. If the parking is to be cancelled, the electromagnet is electrified, the lock plunger is sucked out of the piston positioning groove, the electromagnetic valve supplies pressure oil to the oil cylinder, the piston moves leftwards under the action of the pressure oil, and the parking actuating rod is pulled out of the parking position. The electromagnet in the electromagnetic control type parking mechanism is high in cost, easy to lose efficacy, space-occupying, and in addition, software control is needed, so that the problems of high development cost and complex control exist.
Disclosure of Invention
The invention aims to provide a hydraulic parking actuating assembly, which solves the problem that an electromagnet adopted by a parking actuating mechanism in the prior art is easy to lose effectiveness.
It is a further object of the first aspect of the invention to simplify the control procedure of the parking actuator.
It is an object of a second aspect of the invention to provide a vehicle.
According to a first aspect of the present invention there is provided a hydraulic parking actuation assembly comprising:
a housing defining an interior chamber into and out of which a fluid may enter;
the movable module is arranged along the axial direction of the inner cavity and movably extends out of/retracts into the inner cavity under the action of the fluid pressure, and a limiting part is arranged on the movable module;
the actuating rod is connected with the movable module and is driven by the movable module to switch between a parking state and a driving state;
a pressing mechanism having a high stroke and a low stroke, configured to be pressed by the movable module when extending out of the inner cavity to switch between the high stroke/the low stroke, wherein,
when the movable module is in the inner cavity, the pressing mechanism is in the low stroke, and the actuating rod is in the parking state;
when the pressing mechanism is positioned at the high-position stroke, the pressing mechanism is matched with the limiting part so that the movable module drives the actuating rod to be in the driving state.
Optionally, a mounting cavity is arranged along the radial direction of the shell;
the pressing mechanism is arranged in the mounting cavity.
Optionally, the pressing mechanism comprises:
the parking lock pin is arranged in the mounting cavity along the radial direction of the shell and is used for separating from the limiting part to enable the actuating rod to be in a parking state during the low-position stroke and contacting with the limiting part to enable the actuating rod to be in a driving state during the high-position stroke;
the elastic piece is positioned at the bottom of the mounting cavity and used for providing restoring force for the parking lock pin when the parking lock pin is separated from the extrusion of the movable module so as to enable the parking lock pin to be switched between a high-position stroke and a low-position stroke;
the guide mechanism is arranged between the installation cavity and the elastic piece;
and the driving block is connected with the parking lock pin and the elastic piece and is used for being matched with the guide mechanism under the extrusion of the movable module so as to switch the parking lock pin between the high-position stroke and the low-position stroke.
Optionally, the driving block is provided with a plurality of first lugs at intervals along the circumferential direction of the driving block;
the guide mechanism includes:
the guide block is sleeved on the elastic piece and is provided with a plurality of first grooves arranged at intervals along the circumferential direction of the guide block;
a limiting block which is provided with a plurality of short grooves and a plurality of long grooves at intervals along the circumferential direction thereof,
when the first lug on the driving block enters the long groove on the limiting block and the first groove, the pressing mechanism is in a high stroke;
when the first lug on the driving block enters the short groove on the limiting block and the first groove, the pressing mechanism is in a low stroke.
Optionally, the limiting part is a groove formed along the radial direction of the movable module;
the groove is provided with two opposite side walls, and one side wall of the two side walls, which is close to the end part of the movable module, is a slope.
Optionally, the movable module is a pressing portion from an end of the movable module to the slope, and the pressing portion is used for pressing the pressing mechanism when the movable module extends out of the inner cavity so as to switch the pressing mechanism between the high-position stroke and the low-position stroke.
Optionally, the method further comprises:
and the sliding sleeve is sleeved on the movable module and used for sealing the inner wall of the inner cavity and the inner wall of the movable module.
Optionally, the pressing mechanism further comprises:
and the limiting spring is sleeved on the parking lock pin and is arranged above the limiting block.
Optionally, the movable module is a piston rod;
the elastic piece is a spring.
According to the object of the second aspect of the invention, the invention also provides a transmission, and the transmission is provided with the hydraulic parking actuating assembly.
The invention is provided with a pressing mechanism with a high-position stroke and a low-position stroke, and the pressing mechanism is configured to be extruded by the movable module when extending out of the inner cavity so as to switch between the high-position stroke and the low-position stroke, so that the pressing mechanism is in the low-position stroke when the movable module is in the inner cavity, and the actuating rod is in a parking state. When the movable module extends out of the inner cavity, the pressing mechanism is extruded, so that the pressing mechanism is matched with the limiting part when being switched into a high-position stroke, and the actuating rod is in a driving state. The invention replaces a locking electromagnetic valve in the prior art, utilizes a mechanical pressing mechanism to switch the actuating rod between the parking state and the driving state, and has the advantages of simple structural design, small occupied space, low cost and difficult failure.
According to the invention, the movable module extrudes the pressing mechanism once when extending out of the inner cavity, and the stroke of the pressing mechanism is switched once when each pair of pressing mechanisms extrudes once, so that the actuating rod is switched between a parking state and a driving state. The invention replaces the complex control of the parking actuating mechanism in the prior art, simplifies the control process of the parking actuating mechanism, and is quicker and more convenient.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 is a schematic diagram of a prior art electro-hydraulically operated parking mechanism;
FIG. 2 is a schematic cross-sectional view of a hydraulic parking actuation assembly in a park condition according to one embodiment of the present invention;
FIG. 3 is an enlarged schematic view of portion A of the hydraulic parking actuation assembly of FIG. 2;
FIG. 4 is a schematic block diagram of a pressing mechanism of the hydraulic parking actuation assembly of FIG. 2;
FIG. 5 is a schematic cross-sectional view of a movable module of a hydraulic parking actuation assembly extending out of an interior cavity in accordance with one embodiment of the present invention;
FIG. 6 is an enlarged schematic view of portion A of the hydraulic parking actuation assembly of FIG. 5;
FIG. 7 is a schematic block diagram of a pressing mechanism of the hydraulic parking actuation assembly of FIG. 5;
FIG. 8 is a schematic cross-sectional view of a hydraulic parking actuation assembly in a drive state according to one embodiment of the present invention;
FIG. 9 is an enlarged schematic view of portion A of the hydraulic parking actuation assembly of FIG. 8;
fig. 10 is a schematic configuration diagram of a pressing mechanism in the hydraulic parking actuation assembly shown in fig. 8.
Detailed Description
Fig. 1 is a schematic diagram of a prior art electro-hydraulically operated parking mechanism. During parking, the solenoid proportional valve is unloaded, the electromagnet 10 is energized, the plunger 20 is sucked out of the piston positioning groove 50, and the spring 30 pushes the piston and the parking actuating rod 60 to the parking position. If the parking is to be cancelled, the electromagnet 10 is electrified, the lock plunger 20 is sucked out of the piston positioning groove 50, the solenoid valve supplies pressure oil to the oil cylinder 40, the piston moves leftwards under the action of the pressure oil, and the parking actuating rod 60 is pulled out of the parking position. The electromagnet in the electromagnetic control type parking mechanism is high in cost, easy to lose efficacy, space-occupying, and in addition, software control is needed, so that the problems of high development cost and complex control exist.
Fig. 2 is a schematic sectional view of a hydraulic parking actuating assembly in a parking state according to an embodiment of the present invention, fig. 3 is a schematic enlarged view of a portion a of the hydraulic parking actuating assembly shown in fig. 2, and fig. 4 is a schematic structural view of a pressing mechanism 3 of the hydraulic parking actuating assembly shown in fig. 2. As shown in fig. 2-4, in one particular embodiment, the hydraulic parking actuation assembly 100 may generally include a housing 1, an active module 2, a pressing mechanism 3, and an actuation lever coupled to the active module 2. Wherein the housing 1 defines an internal chamber 11 into and out of which a fluid can enter. The movable module 2 is arranged axially along the cavity 11, and movably extends/retracts into the cavity 11 under the action of the fluid pressure, and a limit portion 21 is provided on the movable module 2. The actuating lever is moved by the movable module 2 to switch between the parking state and the driving state. Wherein the actuating lever is not shown in the figures. The pressing mechanism 3 is provided with a high stroke and a low stroke, and is configured to be pressed by the movable module 2 when extending out of the inner cavity 11 so as to switch between the high stroke and the low stroke. Specifically, when the movable module 2 is in the inner cavity 11, the pressing mechanism 3 is in a low-position stroke, the actuating rod is in a parking state, the pressing mechanism 3 is in a high-position stroke, and the pressing mechanism is matched with the limiting part 21 to enable the actuating rod to be in a driving state. Wherein, the movable module 2 may be a piston rod. The other end of the inner cavity 11, which is far away from the end of the piston rod, is provided with a sliding sleeve 4, and the sliding sleeve 4 is sleeved on the movable module 2 and used for sealing the inner wall of the inner cavity 11 and the inner wall of the movable module 2.
The invention replaces the electromagnetic control type parking mechanism in the prior art, utilizes the mechanical type pressing mechanism 3 to switch the actuating rod in the parking state/driving state, and has the advantages of simple structural design, small occupied space, low cost and difficult failure.
Specifically, the end of the movable module 2 is acted by hydraulic oil, the other end of the movable module 2 is pressed in the inner cavity 11 by a parking spring, and when the hydraulic oil enters the inner cavity 11, the end of the movable module 2 is pressed by the hydraulic oil, so that the other end of the movable module 2 extends out of the inner cavity 11. When the hydraulic oil pressure is low and the pressing mechanism 3 is in a low stroke, the parking spring presses the movable module 2 into the inner cavity 11 to be in a parking state, and the actuating rod connected with the movable module 2 rotates the pawl to a position meshed with the ratchet wheel, so that the transmission stops rotating, and the vehicle is braked.
In a further embodiment, a mounting cavity 12 is provided along the radial direction of the housing 1, and the pressing mechanism 3 is provided in the mounting cavity 12. The pressing mechanism 3 is arranged in the shell 1, so that the space of the hydraulic parking actuating assembly can be saved, and the structure of the hydraulic parking actuating assembly is more compact.
Specifically, the pressing mechanism 3 includes a parking lock pin 31, an elastic member 32, a guide mechanism 34, and a driving block 33. The parking lock pin 31 is disposed in the radial direction of the housing 1 in the mounting chamber 12, and is configured to be separated from the stopper portion 21 at the time of a low stroke to place the actuator lever in a parking state, and to be in contact with the stopper portion 21 at the time of a high stroke to place the actuator lever in a traveling state. A resilient member 32 is located at the bottom of the mounting cavity 12 and is used to provide a restoring force to the parking lock pin to switch the parking lock pin between the high stroke and the low stroke when the parking lock pin is released from the compression of the movable module. The guide mechanism 34 is disposed between the mounting chamber 12 and the elastic member 32. The driving block 33 is disposed between the parking lock pin 31 and the elastic member 32 and connected to the parking lock pin 31 and the elastic member 32, and the driving block 33 is configured to cooperate with the guide mechanism 34 under the pressing of the movable module 2 to switch the parking lock pin 31 between the high stroke and the low stroke. Wherein, the elastic member 32 may be a spring.
Fig. 5 is a schematic sectional view of a movable module of a hydraulic parking actuating assembly according to an embodiment of the present invention, fig. 6 is a schematic enlarged view of a portion a of the hydraulic parking actuating assembly shown in fig. 5, fig. 7 is a schematic structural view of a pressing mechanism of the hydraulic parking actuating assembly shown in fig. 5, fig. 8 is a schematic sectional view of the hydraulic parking actuating assembly in a driving state according to an embodiment of the present invention, fig. 9 is a schematic enlarged view of a portion a of the hydraulic parking actuating assembly shown in fig. 8, and fig. 10 is a schematic structural view of the pressing mechanism of the hydraulic parking actuating assembly shown in fig. 8. As shown in fig. 5-10 and referring to fig. 2-4, when the hydraulic oil pressure is low, the actuating rod is in the parking state in the cavity 11 of the movable module 2, and the pressing mechanism 3 is in the low stroke, at this time, the pressing mechanism 3 is separated from the limiting portion 21. When the pressure of the hydraulic oil is increased to extend the movable module 2 out of the inner cavity 11, the pressing mechanism 3 is pressed by the side wall of the movable module 2 (see fig. 5). When the pressure of the hydraulic oil is reduced, the movable module 2 can be retracted into the inner cavity 11 by the restoring force of the parking spring, and in the retracting process, the pressing mechanism 3 is separated from the extrusion of the movable module 2, so that the movable module 2 is converted into a high-position stroke and enters the limiting part 21 of the movable module 2, the movable module 2 is not completely retracted into the inner cavity 11, and the actuating rod is in a driving state (see fig. 8).
When the pressure of the hydraulic oil increases again, the movable module 2 extends out of the inner cavity 11 again, so that the pressing mechanism 3 is separated from the limiting part 21 and extrudes the pressing mechanism 3. When the pressure of the hydraulic oil is reduced again, the movable module 2 retracts into the inner cavity 11 again, the pressing mechanism 3 is separated from the extrusion of the movable module 2 and is converted into a low-position stroke, the pressing mechanism 3 cannot enter the limiting part 21 when in the low-position stroke, so that the movable module 2 directly and completely enters the inner cavity 11, and the actuating lever restores the parking state. The conversion is cycled according to the method described above. Wherein, the pressing mechanism 3 can change the stroke once extruded each time.
In another embodiment, the driving block 33 is provided with a plurality of first protrusions 331 at intervals along a circumferential direction thereof. The guide mechanism 34 includes a guide block 342 and a stopper 341. The guide block 342 is fitted over the elastic member 32 and has a plurality of first grooves 3421 arranged at intervals along the circumferential direction of the guide block 342. The stop block 341 is provided with a plurality of short grooves 3412 and a plurality of long grooves 3411 at intervals along the circumferential direction, and a second projection is arranged between the short grooves 3412 and the long grooves 3411.
Further, when the first protrusion 331 of the driving block 33 enters the long groove 3411 and the first groove 3421 of the stopper 341, the pressing mechanism 3 is in the high stroke. When the first protrusion 331 of the driving block 33 enters the short groove 3412 and the first groove 3421 of the stopper 341, the pressing mechanism 3 is in the low stroke. By means of the design of the mechanical pressing mechanism 3, the parking execution assembly can be switched conveniently, and the process is simpler.
When the pressing mechanism 3 is changed from the low stroke to the high stroke, the parking lock pin 31 in the pressing mechanism 3 is pressed by the movable module 2 to drive the driving block 33 to move towards the bottom of the mounting cavity 12, at this time, the first protrusion 331 on the driving block 33 slides out of the short groove 3412 on the stopper 341 and completely enters the first groove 3421 on the guide block 342, when the parking lock pin 31 is released from the pressing of the movable module 2, the driving block 33 is subjected to the restoring force of the elastic member 32 to rotate the driving block 33 so that the first protrusion 331 enters the long groove 3411 on the stopper 341, and the parking lock pin 31 is switched to the high stroke.
When the pressing mechanism 3 is changed from the high stroke to the low stroke, the parking lock pin 31 in the pressing mechanism 3 is pressed by the movable module 2 to drive the driving block 33 to move towards the bottom of the mounting cavity 12, at this time, the first protrusion 331 on the driving block 33 slides out of the long groove 3411 on the stopper 341 and completely enters the first groove 3421 on the guide block 342, when the parking lock pin 31 is released from the pressing of the movable module 2, the driving block 33 is subjected to the restoring force of the elastic member 32 to rotate the driving block 33 so that the first protrusion 331 enters the short groove 3412 on the stopper 341, and the parking lock pin 31 is switched to the low stroke.
In one embodiment, the limiting portion 21 is a groove formed along the radial direction of the movable module 2, the groove has two opposite side walls, and one of the two side walls, which is close to the end of the movable module 2, is a slope. The slope is provided to facilitate the entry and exit of the parking lock pin 31 in the pressing mechanism 3.
Further, the movable module 2 is a pressing portion from the end portion to the slope section, and the pressing portion is used for pressing the pressing mechanism 3 when the movable module 2 extends out of the inner cavity 11, so that the pressing mechanism 3 is switched between a high stroke and a low stroke. That is, the diameter of the section from the end of the movable module 2 to the position-limiting portion 21 is set to be larger, and the diameter of the other end of the movable module 2 is smaller than the section from the end, so that the parking lock pin 31 does not interfere with the other end of the movable module 2 during the low stroke, and interferes with the section from the end of the movable module 2 to the position-limiting portion 21 when the movable module 2 moves, so that the parking lock pin 31 is pressed by the movable module 2 to perform stroke conversion.
The hydraulic parking actuation assembly 100 also includes a magnet and a gear position sensor. The magnet is connected with the movable module 2, and the gear position sensor is arranged in the shell 1 and used for identifying the position of the movable module 2 by identifying the position of the magnet so as to obtain the state of the actuating rod.
The pressing mechanism 3 further includes a limiting spring 35, which is sleeved on the parking lock pin 31 and is disposed above the limiting block 341, and is used for limiting the parking lock pin 31.
The invention also provides a transmission provided with a hydraulic parking actuation assembly as in any one of the embodiments described above. For the hydraulic parking actuation assembly, it is not described herein.
According to the invention, the movable module 2 extrudes the pressing mechanism 3 once each time when extending out of the inner cavity 11, and the stroke of the pressing mechanism 3 is switched once each time each pair of pressing mechanisms 3 are extruded, so that the actuating rod is switched between the parking state and the driving state. The invention replaces the complex control of the parking actuating mechanism in the prior art, simplifies the control process of the parking actuating mechanism, and is quicker and more convenient.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (7)
1. A hydraulic parking actuation assembly, comprising:
a housing defining an interior chamber into and out of which a fluid may enter;
the movable module is arranged along the axial direction of the inner cavity and movably extends out of/retracts into the inner cavity under the action of the fluid pressure, and a limiting part is arranged on the movable module;
the actuating rod is connected with the movable module and is driven by the movable module to switch between a parking state and a driving state;
a pressing mechanism having a high stroke and a low stroke, configured to be pressed by the movable module when extending out of the inner cavity to switch between the high stroke/the low stroke, wherein,
when the movable module is in the inner cavity, the pressing mechanism is in the low stroke, and the actuating rod is in the parking state;
when the pressing mechanism is in the high-position stroke, the pressing mechanism is matched with the limiting part so that the movable module drives the actuating rod to be in the driving state;
an installation cavity is arranged along the radial direction of the shell;
the pressing mechanism is arranged in the mounting cavity;
the pressing mechanism includes:
the parking lock pin is arranged in the mounting cavity along the radial direction of the shell and is used for separating from the limiting part to enable the actuating rod to be in a parking state during the low-position stroke and contacting with the limiting part to enable the actuating rod to be in a driving state during the high-position stroke;
the elastic piece is positioned at the bottom of the mounting cavity and used for providing restoring force for the parking lock pin when the parking lock pin is separated from the extrusion of the movable module so as to enable the parking lock pin to be switched between a high-position stroke and a low-position stroke;
the guide mechanism is arranged between the installation cavity and the elastic piece;
the driving block is connected with the parking lock pin and the elastic piece and is used for being matched with the guide mechanism under the extrusion of the movable module so as to switch the parking lock pin between the high-position stroke and the low-position stroke;
the driving block is provided with a plurality of first lugs at intervals along the circumferential direction of the driving block;
the guide mechanism includes:
the guide block is sleeved on the elastic piece and is provided with a plurality of first grooves arranged at intervals along the circumferential direction of the guide block;
a limiting block which is provided with a plurality of short grooves and a plurality of long grooves at intervals along the circumferential direction thereof,
when the first lug on the driving block enters the long groove on the limiting block and the first groove, the pressing mechanism is in a high stroke;
when the first lug on the driving block enters the short groove on the limiting block and the first groove, the pressing mechanism is in a low stroke.
2. The hydraulic parking actuation assembly of claim 1,
the limiting part is a groove formed along the radial direction of the movable module;
the groove is provided with two opposite side walls, and one side wall of the two side walls, which is close to the end part of the movable module, is a slope.
3. The hydraulic parking actuation assembly of claim 2,
the movable module is a squeezing part from the end part to the slope, and the squeezing part is used for squeezing the pressing mechanism when the movable module extends out of the inner cavity so as to enable the pressing mechanism to be switched between the high-position stroke and the low-position stroke.
4. The hydraulic parking actuation assembly of claim 1 further comprising:
and the sliding sleeve is sleeved on the movable module and used for sealing the inner wall of the inner cavity and the inner wall of the movable module.
5. The hydraulic parking actuation assembly of claim 1 wherein the pressing mechanism further comprises:
and the limiting spring is sleeved on the parking lock pin and is arranged above the limiting block.
6. The hydraulic parking actuation assembly of claim 1,
the movable module is a piston rod;
the elastic piece is a spring.
7. A transmission fitted with a hydraulic parking actuation assembly as claimed in any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910798197.0A CN110425278B (en) | 2019-08-27 | 2019-08-27 | Hydraulic parking execution assembly and transmission |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910798197.0A CN110425278B (en) | 2019-08-27 | 2019-08-27 | Hydraulic parking execution assembly and transmission |
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| CN110425278A CN110425278A (en) | 2019-11-08 |
| CN110425278B true CN110425278B (en) | 2020-09-25 |
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| DE102020120622B4 (en) | 2020-08-05 | 2022-05-19 | Schaeffler Technologies AG & Co. KG | Method for resetting a parking lock actuation system and a parking lock actuation system |
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| CN1701193A (en) * | 2003-04-25 | 2005-11-23 | 五十铃自动车株式会社 | Parking device for motor vehicle |
| DE102009052149A1 (en) * | 2009-11-06 | 2011-05-12 | Daimler Ag | Locking device i.e. electrically operated parking brake locking device, for motor vehicle, has spring-loaded locking element for locking operating rod, and switching unit releasing rod to change blocking force acts on locking element |
| DE102010032733A1 (en) * | 2010-07-30 | 2011-04-21 | Daimler Ag | Parking lock device for motor vehicle, has pressure line for guiding operating fluid for producing actuating pressure in pressure chamber, and another pressure line for creating drain for operating fluid in pressure chamber |
| JP2014148199A (en) * | 2013-01-31 | 2014-08-21 | Aisin Aw Co Ltd | Holding mechanism and parking device with the same |
| WO2016087018A3 (en) * | 2014-12-06 | 2016-07-28 | Daimler Ag | Parking lock device |
| CN107636365A (en) * | 2015-07-24 | 2018-01-26 | 宝马股份公司 | Parking braking system |
| CN205532759U (en) * | 2016-01-20 | 2016-08-31 | 潍柴动力股份有限公司 | Switching mechanism of engine brake system |
| JP2018047825A (en) * | 2016-09-23 | 2018-03-29 | ジヤトコ株式会社 | Park locking device |
| CN109307070A (en) * | 2017-07-28 | 2019-02-05 | 福特全球技术公司 | Speed changer parking control system |
Also Published As
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| CN110425278A (en) | 2019-11-08 |
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