CN106931161A - A kind of hydraulic pressure halting mechanism and automatic transmission - Google Patents
A kind of hydraulic pressure halting mechanism and automatic transmission Download PDFInfo
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- CN106931161A CN106931161A CN201511023371.2A CN201511023371A CN106931161A CN 106931161 A CN106931161 A CN 106931161A CN 201511023371 A CN201511023371 A CN 201511023371A CN 106931161 A CN106931161 A CN 106931161A
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- parking
- push rod
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- cam
- locking
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- 230000007246 mechanism Effects 0.000 title claims abstract description 115
- 230000005540 biological transmission Effects 0.000 title claims abstract description 49
- 230000033001 locomotion Effects 0.000 claims abstract description 50
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 239000010720 hydraulic oil Substances 0.000 claims description 9
- 238000000926 separation method Methods 0.000 claims description 4
- 238000005192 partition Methods 0.000 claims 1
- 238000000034 method Methods 0.000 description 13
- 230000008569 process Effects 0.000 description 11
- 239000003921 oil Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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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
- F16H63/3425—Parking lock mechanisms or brakes in the transmission characterised by pawls or wheels
- F16H63/3433—Details of latch mechanisms, e.g. for keeping pawls out of engagement
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear-Shifting Mechanisms (AREA)
Abstract
The invention provides a kind of hydraulic pressure halting mechanism and automatic transmission, it is related to automobile technical field, is broken down with solving hydraulic pressure halting mechanism, automobile is entered the problem of non-parked state from parked state.The hydraulic pressure halting mechanism, including hydraulic cylinder, the parking piston being located in the hydraulic cylinder and locking and the automatic locking mechanism of the parking piston can be unlocked, the parking piston is connected with the push rod for being provided with parking cam, also including the manual unlocking device for driving the push rod to be moved along a straight line along its axial direction.Due to manual unlocking device can driving push rod moved along a straight line along its axial direction, therefore, the part of piston linear motion can driven to break down in the hydraulic pressure halting mechanism that the present invention is provided, manually parking cam can made to be separated with parking arm by tripper, hence into non-parked state.The hydraulic pressure halting mechanism that the present invention is provided is used for automobile technical field.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a hydraulic parking mechanism and an automatic transmission.
Background
An automatic transmission is an automotive transmission that can automatically change gear ratios during vehicle travel. In order to ensure the safety of the automobile in the sliding process, a parking mechanism is generally installed in the automatic transmission to ensure that the automobile can be parked at a certain position or even on a steep slope without any time limit.
At present, a common parking mechanism is a hydraulic parking mechanism, and comprises a hydraulic parking push rod assembly, a parking arm and a parking gear sleeved on an input shaft; the structure of the hydraulic parking push rod assembly is shown in figure 1, and the hydraulic parking push rod assembly mainly comprises a hydraulic cylinder 1 and a parking piston 3 arranged in the hydraulic cylinder 1, wherein the parking piston 3 is fixedly connected to a parking push rod 2, and one end, extending out of the hydraulic cylinder, of the parking push rod 2 is sleeved with a parking cam 4 used for being in contact with a parking arm; the hydraulic cylinder 1 is provided with a through hole for installing the piston locking pin 5, and the electromagnet 6 outside the hydraulic cylinder 1, the piston locking pin 5 and the electromagnet 6 form an automatic locking mechanism.
When the automobile is in a parking state, the electromagnet is not electrified, the piston locking pin 5 locks the parking piston 3, so that the parking piston 3 does not move along the axial direction of the hydraulic cylinder 1, the parking cam 4 is kept in contact with the parking arm, and the parking arm stops the transmission of the parking gear, so that the power transmission in the automatic transmission is interrupted, and the automobile can be ensured to be in the parking state for a long time; when the parking state of the automobile is to be released, the electromagnet 6 is electrified to enable the electromagnet 6 to press the piston locking pin 5 downwards so that the parking piston 3 can move along the axial direction of the hydraulic cylinder 1, the parking piston 3 moves towards the left side of the hydraulic parking push rod assembly shown in the figure 1 through the pressure of hydraulic oil, at the moment, the parking cam 4 is separated from the parking arm, the parking gear is not pressed by the parking arm to drive the transmission shaft to rotate, the automatic transmission can transmit power, and the parking state of the automobile is released.
Although the hydraulic parking mechanism can well realize the parking function of the automobile, when a component which can drive the piston to move linearly in the hydraulic parking mechanism breaks down, the automobile cannot enter the non-parking state from the parking state.
Disclosure of Invention
In view of the above, the present invention is directed to a hydraulic parking push rod assembly, so as to solve the problem that an automobile cannot enter a non-parking state from a parking state when a component capable of driving a piston to move linearly in the hydraulic parking push rod assembly fails.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the utility model provides a hydraulic pressure parking mechanism, includes the pneumatic cylinder, establishes parking piston in the pneumatic cylinder and can locking and unblock parking piston's automatic locking mechanism, parking piston links to each other with the push rod that is equipped with the parking cam, still including being used for the drive the push rod carries out linear motion's manual unlocking device along its axial.
Preferably, the manual unlocking device comprises a manual part and a transmission part which can drive the push rod to move linearly along the axial direction of the push rod under the control of the manual part.
Preferably, the manual unlocking device is a cam mechanism, a gear rack mechanism or a worm and gear mechanism;
when manual unlocking means does during cam mechanism, cam mechanism includes as manual part's manual cam with as transmission part's arch, the arch is established on the push rod, just protruding with manual cam's profile surface contact, be equipped with the locking plane on manual cam's the profile surface, manual messenger during manual cam rotates, manual cam can drive protruding edge the push rod place direction removes, in order to drive the push rod removes, makes on the push rod parking cam and parking arm separation get into non-parking.
When the manual unlocking device is the gear rack mechanism, the gear rack mechanism comprises a manual gear serving as the manual part and a rack serving as the transmission part, the rack is meshed with the manual gear, the rack is arranged on the push rod, and the manual gear is meshed with the rack;
when the manual unlocking device is the worm gear and worm mechanism, the worm gear and worm mechanism comprises a manual worm as the manual part, a worm gear as the transmission part and a conversion mechanism capable of converting rotary motion into linear motion, the worm gear is meshed with the manual worm, and the worm gear is connected with the push rod through the conversion mechanism.
Preferably, the push rod includes parking push rod and is used for connecting the unblock push rod of parking push rod and parking piston, the parking push rod with unblock push rod is together articulated, the parking cam is established on the parking push rod, the parking push rod with the one end that the unblock push rod links to each other is equipped with the connecting hole, the transmission part is established unblock push rod with the one end that the parking push rod links to each other, the unblock push rod with the one end that the parking push rod links to each other passes the connecting hole, make protruding with manual cam contact.
Furthermore, the parking piston divides the interior of the hydraulic cylinder into a first variable chamber and a second variable chamber, the automatic locking mechanism is arranged in the first variable chamber, and one end of the unlocking push rod connected with the parking piston is arranged on one side of the parking piston, which is positioned in the second variable chamber; wherein,
a first elastic connecting piece is arranged in the first variable chamber to push the parking piston to enable the parking cam to be in a parking state; the second variable chamber is communicated with an oil hole formed in the hydraulic cylinder, so that the parking piston is pushed to drive the unlocking push rod to move when hydraulic oil is introduced into the second variable chamber, and the unlocking push rod drives the parking cam on the parking push rod to be separated from the parking arm.
Further, the automatic locking mechanism comprises a pin body and a movable locking device; one end of the pin body is a connecting end connected with the parking piston, and the other end of the pin body is a free end; the pin body is provided with a locking groove with the same structure as the key groove, the movable locking device is provided with a guide groove, and the guide groove comprises a guide part for enabling the free end to penetrate through the movable locking device and a locking convex part capable of being clamped with the locking groove in a non-parking state;
in the parking state, the movable locking device blocks the free end to enable the parking piston to keep locked; in the non-parking state, the movable locking device moves to enable the free end to penetrate through the guide portion, and the locking convex portion is clamped with the locking groove.
More preferably, the movable locking device comprises a locking device and a linear motion driving device, and the guide groove is formed in the locking device; wherein,
the linear motion driving device is positioned outside the hydraulic cylinder, one end of the locking device is in contact with the power output end of the linear motion driving device, the other end of the locking device extends into the first variable chamber in the hydraulic cylinder, and the end, which can be in contact with the power output end, of the locking device is connected with the outer wall of the hydraulic cylinder through a second elastic connecting piece;
the linear motion driving device pushes the locking device to move through the power output end, so that the free end can penetrate through the guide part in the non-parking state, and the second elastic connecting piece drives the locking device to move in the non-parking state, so that the locking convex part is clamped with the locking groove.
Preferably, the hydraulic cylinder is provided with a mounting hole on the inner wall of the first variable chamber; the locking device comprises a stress part, a working part and a mounting part which can be mounted in the mounting hole, wherein the stress part, the working part and the mounting part are sequentially connected; the stress part can be contacted with the power output end, and the guide groove is formed in the locking part.
Compared with the prior art, the hydraulic parking mechanism provided by the invention has the following advantages:
in the hydraulic parking mechanism provided by the invention, the parking piston in the hydraulic cylinder is connected with the push rod, and the manual unlocking device can drive the push rod to linearly move along the axial direction of the manual unlocking device; therefore, in the hydraulic parking mechanism provided by the invention, the part capable of driving the piston to do linear motion breaks down, so that when the automobile cannot enter the non-parking state from the parking state, the manual unlocking device can be used for pushing the push rod to drive the parking push rod to move, the parking cam arranged on the parking push rod is separated from the parking arm, and the automobile enters the non-parking state.
Another objective of the present invention is to provide an automatic transmission to solve the problem that the hydraulic parking mechanism fails, so that the vehicle cannot enter the non-parking state from the parking state. In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the automatic transmission is provided with the hydraulic parking mechanism in the technical scheme.
Preferably, the housing of the automatic transmission is fixedly connected with the outer wall of the hydraulic cylinder in the hydraulic parking mechanism.
Compared with the prior art, the automatic transmission has the following advantages:
compared with the prior art, the advantages of the automatic transmission and the hydraulic parking mechanism in the technical scheme are the same, and are not described again.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a hydraulic parking mechanism of the prior art;
FIG. 2 is a schematic structural diagram of the hydraulic parking mechanism of the present embodiment in a parking state;
FIG. 3 is a schematic structural diagram of the hydraulic parking mechanism of the present embodiment when the hydraulic parking mechanism is not in the parking device;
FIG. 4 is a schematic structural diagram of the parking cam and the unlocking push rod in the parking state in the present embodiment;
FIG. 5 is a schematic structural diagram of the parking cam and the unlocking push rod in the non-parking state in the present embodiment;
FIG. 6 is a schematic structural view of the lock device in the parking state according to the present embodiment;
FIG. 7 is a schematic structural diagram of the lock device in the present embodiment in the non-parking state;
description of reference numerals:
1-a hydraulic cylinder, 10-an oil hole, 11-a first variable chamber;
110-first elastic connector, 12-second variable chamber, 2-parking push rod;
21-a first gasket, 22-a second gasket, 23-a third elastic connecting piece;
3-parking piston, 4-parking cam, 5-piston locking pin;
6-electromagnet, 7-automatic locking mechanism, 71-pin body;
710-locking groove, 72-movable locking means, 720-guide groove;
721-linear motion driving device, 722-locking device, 723-second elastic connecting piece;
81-unlocking push rod, 82-manual cam.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 2 and 3, an embodiment of the present invention provides a hydraulic parking mechanism, including a hydraulic cylinder 1, a parking piston 3 disposed in the hydraulic cylinder 1, and an automatic locking mechanism 7 capable of locking and unlocking the parking piston 3, where the parking piston 3 is connected to a push rod having a parking cam 4, and further including a manual unlocking device for driving the push rod to perform linear motion along an axial direction thereof.
In the working process, when a part which can drive a piston to do linear motion in the hydraulic parking mechanism breaks down, so that an automobile cannot enter a non-parking state from the parking state, the manual unlocking device is manually controlled to drive the push rod to do linear motion along the axial direction of the push rod so as to drive the push rod to move, so that the parking cam 4 arranged on the parking push rod 2 is separated from the parking arm, and the automobile enters the non-parking state.
According to the working process, in the hydraulic parking mechanism provided by the embodiment, the parking piston 3 in the hydraulic cylinder is connected with the push rod, and the manual unlocking device can drive the push rod to perform linear motion along the axial direction of the manual unlocking device; therefore, in the hydraulic parking mechanism provided by the embodiment, a component capable of driving the piston to perform linear motion breaks down, so that when the automobile cannot enter the non-parking state from the parking state, the manual unlocking device can be used for pushing the push rod to drive the parking push rod to move, the parking cam arranged on the parking push rod is separated from the parking arm, and the automobile enters the non-parking state.
It should be noted that the manual unlocking device in the above embodiments has many specific forms, as long as the push rod can be pushed to move along the axial direction thereof, so that the parking cam 4 on the parking push rod 2 is separated from the parking arm, thereby entering into the non-parking state.
Generally, a manual unlocking device includes a manual part and a transmission part capable of driving a push rod to move linearly in an axial direction thereof under the control of the manual part. Since the transmission part can drive the push rod to move along the axial direction of the push rod under the control of the manual part, the transmission part can be controlled by the manual part to separate the parking cam 4 on the parking push rod from the parking arm, so that the parking is not carried out.
The manual unlocking device in the above embodiments may be a cam mechanism, a rack and pinion mechanism or a worm and gear mechanism, but other mechanisms that can be realized are not excluded.
Referring to fig. 4 and 5, when the manual unlocking device is the cam mechanism, the cam mechanism includes a manual cam 82 of the manual part and a protrusion serving as a transmission part, the protrusion is disposed on the push rod and contacts with a profile surface of the manual cam, and when the manual cam 82 is rotated manually, the manual cam 82 can drive the protrusion to move along the direction of the push rod, so as to drive the push rod to move, so that the parking cam 4 on the push rod is separated from the parking arm to enter the non-parking state. Because the manual cam 82 can push the push rod to do reciprocating linear movement in the manual control rotation process of the manual cam 82, when the manual cam rotates to a certain stage, the manual cam cannot continuously push the push rod to move towards one direction, but gradually enables the push rod to move towards the opposite direction of the original moving direction, and thus the parking cam 4 on the push rod gradually approaches to the parking arm; in other words, when the manual cam is rotated for a certain time, it is returned to the parking state again from the non-parking state. In order to maintain the non-parking state, the contour surface of the manual cam 82 is provided with a locking plane, so that after the contact point of the manual cam and the protrusion is located on the locking plane, the unlocking push rod 81 can be locked and cannot return to the initial position, and the non-parking state of the automobile is ensured.
When the manual unlocking device is a gear rack mechanism, the gear rack mechanism comprises a manual gear serving as a manual part and a rack serving as a transmission part, the rack is meshed with the manual gear, the rack is arranged on the push rod, and the manual gear is meshed with the rack; because the rack is arranged on the push rod, and the manual gear is meshed with the rack, therefore, when the manual gear is controlled manually to rotate, the manual gear can stir the rack to move linearly through meshing, and the rack is arranged on the push rod, therefore, when the rack moves linearly, the rack can drive the push rod to move linearly, and in order to enable the push rod to move axially, the rack can be arranged on the push rod in a position and a direction through adjusting the rack, the rack can be ensured to drive the push rod to move axially along the push rod, and therefore the parking cam on the push rod can be separated from the parking arm to enter non-parking.
When the manual unlocking device is a worm gear and worm mechanism, the worm gear and worm mechanism comprises a manual worm as a manual part, a worm gear as a transmission part and a conversion mechanism capable of converting rotary motion into linear motion, the worm gear is meshed with the manual worm, and the worm gear is connected with the push rod through the conversion mechanism. The conversion mechanism can convert the rotary motion into the linear motion, so when the manual control manual worm rotates, the manual worm drives the turbine to perform the rotary motion, but the conversion mechanism can convert the rotary motion of the turbine into the linear motion and transmit the linear motion to the push rod so as to move the push rod, and therefore the parking cam on the push rod can be separated from the parking arm and enter the non-parking state.
Moreover, the form of the conversion mechanism is various, for example, a common screw rod mechanism, the turbine can be meshed with a rack arranged on the push rod, so that the turbine stirs the rack to move in the rotary motion process, the rack moves linearly, the push rod is driven to move during the linear motion of the rack, and the parking cam on the push rod can be separated from the parking arm to enter the non-parking state.
In addition, the push rod in the above embodiment may specifically include a parking push rod 2 and an unlocking push rod 81 for connecting the parking push rod 2 and the parking piston 3, the parking cam 4 is disposed on the parking push rod 2, a connecting hole is disposed at one end of the parking push rod 2 connected to the unlocking push rod 81, a transmission portion is disposed at one end of the unlocking push rod 81 connected to the parking push rod 2, and one end of the unlocking push rod 81 connected to the parking push rod 2 passes through the connecting hole, so that the transmission portion is in contact with the manual portion. Because the connecting hole is formed in the end, connected with the unlocking push rod 81, of the parking push rod 2, the transmission part is arranged at the end, connected with the parking push rod 2, of the unlocking push rod 81, the end, connected with the parking push rod 2, of the unlocking push rod 81 penetrates through the connecting hole, it is guaranteed that the manual part can transmit force to the transmission part, and therefore the manual part can drive the transmission part to move along the direction of the parking push rod 2 under the condition of manual control, the unlocking push rod 81 is pushed to move, the unlocking push rod 81 is used for connecting the parking push rod 2 with the parking piston 3, and therefore when the unlocking push rod 81 moves, the parking push rod 2 can be driven to move, so that a parking cam on the parking push rod 2 can be separated from a parking arm to enter.
Moreover, since the end of the unlocking push rod 81 connected with the parking push rod 2 passes through the connecting hole, when the unlocking push rod 81 is pushed to move by a manual part, the connecting hole can prevent the unlocking push rod 81 from being damaged by shaking, and the service life of the unlocking push rod 81 is shortened; moreover, since one end of the unlocking push rod 81 is rigidly connected with the parking piston 3, if the unlocking push rod 81 shakes during the moving process, problems may occur in the connection between the parking push rod 2 and the unlocking push rod 81 and the connection between the parking piston 3 and the unlocking push rod 81, which may result in the manual unlocking being impossible, and the parking cam 4 and the parking arm may not be separated to enter the non-parking state. Therefore, the hydraulic parking mechanism that this embodiment provided makes unblock push rod 81 be equipped with bellied one end and passes spacing hole through setting up the connecting hole on parking push rod 2, has prevented not only that unblock push rod 81 from rocking the influence that causes unblock push rod 81's life, but also can prevent that unblock push rod 81 from becoming invalid, makes parking cam 4 and parking arm unable separation in order to get into non-parking.
In addition, the connection mode between the parking push rod 2 and the unlocking push rod 81 is various, and preferably the connection mode is a hinged connection mode, namely the parking push rod 2 is movably connected with the unlocking push rod 81; like this unblock push rod 81 has taken place to rock at the removal in-process, but can alleviate the mechanical influence that unblock push rod 81 produced parking push rod 2 at the in-process of rocking through parking push rod 2 and unblock push rod 81 swing joint, improves parking push rod 2 and unblock push rod 81's stability.
Specifically, the above-mentioned parking push rod 2 and unlocking push rod 81 may be hinged in an implementation manner: an unlocking connecting hole is formed in one end, hinged with the parking push rod 2, of the unlocking push rod 81 (namely the end, provided with the protrusion, of the unlocking push rod 81), and a limiting connecting hole is formed in the hole wall of the connecting hole; after one end of the unlocking push rod 81, which is hinged to the parking push rod 2, extends into the limiting groove, the connecting piece penetrates through the unlocking connecting hole and the limiting connecting hole, so that the parking push rod 2 is hinged to the unlocking push rod 81. However, the parking push rod 2 and the unlocking push rod 81 are hinged in various ways, but not limited thereto.
It should be noted that, in the hydraulic parking mechanism provided in the above embodiment, when a component capable of driving the piston to perform linear motion fails, so that the vehicle cannot enter the non-parking state from the parking state, the unlocking push rod 81 is driven to move by controlling the manual part, so that the parking cam 4 on the parking push rod 2 is separated from the parking arm, and the vehicle enters the non-parking state, and furthermore, since the unlocking push rod 81 is connected to the parking piston 3 and the parking push rod 2 of the hydraulic parking mechanism, the unlocking push rod 81 can also serve as a connecting member between the parking piston 3 and the parking push rod 2 to perform a power transmission function when the hydraulic parking mechanism normally operates.
In order to more clearly explain how the manual unlocking device is used to manually realize the process from parking to non-parking, the working principle of how the manual unlocking device realizes the process from parking to non-parking when the manual unlocking device is a cam mechanism is described below with reference to fig. 2 and 3.
Referring to fig. 2 and 3, the hydraulic parking mechanism includes a hydraulic cylinder 1 provided with an oil hole 10, a parking piston 3 dividing the interior of the hydraulic cylinder 1 into a first variable chamber 11 and a second variable chamber 12, an automatic locking mechanism 7 provided in the first variable chamber 11, the parking piston 3 located at one side of the second variable chamber 12 and connected to a parking push rod 2 extending out of the hydraulic cylinder 1 through an unlocking push rod 81, and a parking cam 4 provided on the parking push rod 2; wherein,
a first elastic connecting piece 110 is arranged in the first variable chamber 11 to push the parking piston 3 to enable the parking cam 4 to be in a parking state; the second variable chamber 12 is communicated with the oil hole 10, so that the parking piston 3 drives the parking push rod 2 to move through the unlocking push rod 81, and the parking cam 4 is separated from the parking arm.
When the vehicle is not parked, the automatic unlocking mechanism 7 locks the movable parking piston 3, and the first elastic connecting piece 110 is in a compressed state; when the automobile needs to be parked, the automatic unlocking mechanism 7 unlocks the parking piston 3, the first elastic connecting piece 110 pushes the parking piston 3 to move towards the direction of the second variable cavity 12 by virtue of restoring force generated in a compressed state, the parking piston 3 pushes the parking push rod 2 to move through the unlocking push rod 81, so that the parking cam 4 on the parking push rod 2 is in contact with a parking arm, and then the automobile enters a parking state, and the automatic locking mechanism 7 can lock the parking piston 3, so that the automobile can be kept in the parking state for a long time.
When the parking state needs to be changed to the non-parking state from the parking state, the parking piston 3 is unlocked through the automatic locking mechanism 7, then hydraulic oil is introduced into the second variable chamber 12 through the oil hole 10 to push the parking piston 3 to move towards the first variable chamber 11, in the process, the first elastic connecting piece 110 is compressed by the piston, the parking piston 3 drives the parking push rod 2 to move through the unlocking push rod 81, the parking cam 4 is separated from the parking arm, and therefore the automobile is separated from the parking state. At this time, the parking piston 3 is locked by the automatic lock mechanism 7 so that the vehicle is maintained in the non-parking state.
When the automatic locking mechanism 7 and/or the hydraulic oil supply in the hydraulic parking mechanism are/is in a problem, and the automobile cannot be transited from the parking state to the non-parking state, the manual cam 82 can be used for realizing the transition of the automobile from the parking state to the non-parking state.
Specifically, as shown in fig. 4, the manual control manual cam rotates in a rotation direction indicated by an arrow in fig. 4, a distance between a center of a base circle of the manual cam 82 and a contact point between a profile surface of the manual cam and the unlocking push rod 81 is gradually increased, and under the condition that the position of the manual cam is not changed, the manual cam 82 can push the unlocking push rod 81 to drive the parking push rod 2 to move towards the direction of the first variable cavity 11, so that the parking cam 4 is separated from the parking arm, and the automobile is in a parking state to a non-parking state; when the locking plane on the contour surface of the manual cam 82 contacts with the protrusion on the unlocking push rod 81, the position of the unlocking push rod 81 is locked, the parking push rod 2 is no longer driven to move towards the direction of the first variable cavity 11, and the automobile can be in an unparked state for a long time.
After the automobile is adjusted from the parking state to the non-parking state by controlling the manual cam 82, if the automatic locking mechanism 7 and/or the hydraulic oil supply in the hydraulic parking mechanism returns to normal, when the automobile needs to be parked, the automatic locking mechanism 7 unlocks the parking piston 3, the parking piston 3 is pushed by the first elastic connecting piece 110, and moves towards the direction of the second variable chamber 12, the parking piston 3 can push the unlocking push rod 81 to move along a linear motion, the manual cam 82 rotates in the rotating direction shown by an arrow in fig. 5 in order to enable the unlocking push rod 81 to move linearly, the unlocking push rod 81 pushes the parking push rod 2 to move during the period, so that the parking cam 4 is contacted with the parking arm, at the moment, the automobile is in the parking state, and finally the parking piston 3 is locked by the automatic locking mechanism 7.
According to the working process of the hydraulic push rod assembly provided by the embodiment, the hydraulic cylinder 1 of the hydraulic push rod assembly provided by the embodiment is internally provided with the parking piston 3 and the automatic locking mechanism 7 capable of locking and unlocking the parking piston 3; because the parking piston 3 is connected with the parking push rod 2 provided with the parking cam 4 through the unlocking push rod 81, and the protrusion on the unlocking push rod is in contact with the profile surface of the manual cam 82, when the manual cam 82 rotates under manual control, the manual cam 82 can push the protrusion to move, so that the protrusion pushes the unlocking push rod 81 to move, the parking push rod 2 is driven to move, and the parking cam 4 is separated from the parking arm to enter a non-parking state; therefore, when the automatic unlocking structure 7 fails, the manual cam 82 can be used to push the unlocking push rod 81 to drive the parking push rod 2 to move, so that the parking cam 4 is separated from the parking arm, and the automobile enters the non-parking state.
Moreover, the parking piston 3 can divide the interior of the hydraulic cylinder 1 into a first variable chamber 11 and a second variable chamber 12, and the second variable chamber 12 is communicated with an oil hole 10 formed in the hydraulic cylinder, so that hydraulic oil can be introduced into the second variable chamber 12 through the oil hole 10 under normal conditions to push the parking piston 3 to enable the parking cam 4 to be in a non-parking state; when the hydraulic oil supply is in a parking state, the unlocking push rod 81 can be pushed by the manual cam to drive the parking push rod 2 to move, so that the parking cam 4 is separated from the parking arm to enter a non-parking state.
Please refer to fig. 1 and 2, the parking cam 4 on the parking push rod 2 is connected in many ways, for example, a first shim 21 and a second shim are welded on the parking cam 4, the parking piston 3 is located between the first shim 21 and the second shim 22, and one end of the parking piston 3 is connected to the baffle plate through a third elastic connecting member 23.
The automatic lock mechanism 7 in the above embodiment has various structures, and an automatic lock mechanism in an existing hydraulic parking mechanism may be adopted, or an automatic lock mechanism 7 as shown in fig. 2 to 3 and fig. 6 to 7 may be adopted.
As shown in fig. 2 to 3, the automatic lock mechanism 7 includes a pin body 71 and a movable lock device 72; one end of the pin body 71 is a connecting end connected with the parking piston 3, and the other end is a free end; referring to fig. 6, the pin body 71 is provided with a locking groove 710 having the same structure as the key groove, and the movable locking device 72 is provided with a guide groove 720, and referring to fig. 3 and 7, the guide groove 720 includes a guide portion for allowing the free end to pass through the movable locking device 72, and a locking protrusion capable of engaging with the locking groove 710 in the non-parking state;
referring to fig. 2 and 6, the movable locking device 72 blocks the free end in the parking state to keep the parking piston 3 locked, and when the vehicle needs to enter the non-parking state from the parking state, the movable locking device 72 moves to the right side of fig. 6 to enable the free end of the pin 71 to pass through the guide portion in the guide slot 720, so that the parking piston 3 can move towards the first variable cavity 11 by introducing hydraulic oil into the second variable cavity 12 and compress the first elastic connecting piece 110, and the parking piston 3 can drive the parking push rod 2 to move by the unlocking push rod 81 to separate the parking cam 4 from the parking arm and leave the parking state; further, as shown in fig. 7, after the free end of the pin body 71 passes through the guide portion of the guide groove 720 for a while, the locking protrusion of the guide groove 720 can engage with the locking groove 710 of the pin body 71, thereby preventing the pin body 71 from moving, so that the parking piston 3 connected to the connection end of the pin body 71 is locked, and the vehicle is in the non-parking state for a long time.
Referring to fig. 3 and 7, when the automobile needs to enter the parking state from the non-parking state, the movable locking device 72 moves to the right side of fig. 7, so that the locking groove 710 on the pin body 71 is disengaged from the locking convex part on the guide groove 720, and the pin body 71 is located at the guide part of the guide groove 720, so that the first elastic connecting member 110 pushes the parking piston 3 to move towards the second variable cavity 12 by using the elastic force accumulated when the first elastic connecting member is compressed, and the parking piston 3 pushes the parking push rod 2 to move through the unlocking push rod 81, so that the parking cam 4 is in contact with the parking arm to reach the parking state; in the process, the pin body 71 is also drawn out from the guide portion in the guide groove 720 to move in the direction of the second variable cavity 12 along with the parking piston 3, and when the free end of the pin body 71 is drawn out from the guide portion of the guide groove 720, the movable locking device 72 moves to the left as shown in fig. 7, so that the guide groove 720 is misaligned with the free end, and the pin body 71 is blocked by the movable locking device 72, thereby keeping the vehicle in the parking state.
Specifically, referring to fig. 2 and 3, the movable locking device 72 includes a locking device 722 and a linear motion driving device 721, and the guide slot 720 is opened on the locking device 722; wherein,
the linear motion driving device 721 is located outside the hydraulic cylinder 1, one end of the locking device 722 is in contact with the power output end of the linear motion driving device 721, the other end of the locking device 722 extends into the first variable chamber 11 in the hydraulic cylinder 1, and the end of the locking device 722, which can be in contact with the power output end, is connected with the outer wall of the hydraulic cylinder 1 through a second elastic connecting piece 723.
With continued reference to fig. 2 and 3, when the vehicle needs to enter the non-parking state from the parking state, the linear motion driving device 721 pushes the locking device 722 to move through the power output end, so that the free end can pass through the guide portion in the non-parking state, the second elastic connecting member 723 is compressed, when the free end passes through the guide portion, the linear motion driving device 721 returns to the original position, and since the power output end of the linear motion driving device 721 is only contacted with the locking device 722 and is not connected with the locking device 722, the second elastic connecting member 723 connects one end of the locking device 722, which can be contacted with the power output end, with the outer wall 723 of the hydraulic cylinder 1, the second elastic connecting member drives the locking device 722 to move by virtue of the restoring force generated by the compression, so that the locking protrusion is engaged with the locking groove 710 of the pin 71. Referring to fig. 6 and 7, the reason why the locking boss can be engaged with the locking groove 710 is that the locking groove 710 has the same structure as the key groove, that is, the locking groove 710 has an open structure as shown in fig. 6, which enables the locking device 722 to move only in a straight line while keeping the contact between the guide portion of the guide groove 720 and the pin body 71, so that the locking protrusion of the guide groove 720 can smoothly enter the locking groove 710 of the pin body 71, thereby facilitating the locking of the parking piston 3 connected to the pin body 71.
With continued reference to fig. 2 and 3, when the vehicle needs to enter the parking state from the non-parking state, the linear motion driving device 721 drives the locking device 722 to move in the right direction of fig. 7, so that the locking protrusion in the guide groove 720 is separated from the locking groove 710 of the pin body 71, the pin body 71 is located in the guide portion in the guide groove 720, and the second elastic connecting member 723 is compressed, at this time, the linear motion driving device 721 keeps the relative position of the guide portion in the guide groove 720, which is carried by the locking device 722, and the pin body 71, unchanged, under the push of the first elastic connecting member 110, the parking piston 3 carries the pin body 71 to move in the direction of the second variable chamber 12, and the parking piston 3 pushes the parking push rod 2 through the unlocking push rod 81, so that the parking cam 4 contacts with the parking arm, and enters the parking state; while the parking piston 3 carries the pin body 71 to move in the direction of the second variable chamber 12, the pin body 71 is drawn out from the guide portion in the guide groove 720, and when the free end of the pin body 71 is drawn out from the guide portion in the guide groove 720, the linear motion driving device 721 stops operating and retracts to the original position; since the power output end of the linear motion driving device 721 is only in contact with the locking device 722 but not connected thereto, and the second elastic connecting member 723 connects one end of the locking device 722, which can be in contact with the power output end, to the outer wall of the hydraulic cylinder 1, when the linear motion driving device 721 returns to the original position, the second elastic connecting member 723 drives the locking device 722 to move by virtue of the restoring force generated by compression, so that the guide groove 720 is staggered from the free end of the pin 71, thereby locking the pin 71 and placing the vehicle in a parking state.
As can be seen from the above analysis, the automatic locking mechanism 7 in the above embodiment can lock and unlock the parking piston 3 only by the linear motion driving device 721 driving the guide slot 720 on the locking device 722 and the locking groove 710 on the pin 71 to cooperate with each other, so that the automatic locking structure 8 in this embodiment has a simple structure, reduces the difficulty of part processing, and is convenient for installation.
It should be noted that the locking device 722 in the above embodiments has various structures as long as the guiding groove 720 is formed thereon. For example, the locking device 722 in fig. 6 and 7 includes a force receiving portion, an operating portion, and a mounting portion connected in series; the force receiving portion can contact the power output end, and the guide groove 720 is opened in the lock portion. In order to allow the free end of the pin body 71 to pass through the guide portion in the guide groove 720 (from the parking state to the non-parking state) or allow the free end of the pin body 71 to be drawn out from the guide portion in the guide groove 720 (from the non-parking state to the parking state) after the linear motion driving device 721 drives the locking device 722 to move, a mounting hole is further formed in the inner wall of the first variable chamber 11 of the hydraulic cylinder 1 to mount the mounting portion of the locking device 722, so that when the linear motion driving device 721 drives the locking device 722 to move until the free end of the pin body 71 can pass through the guide portion in the guide groove 720 (from the parking state to the non-parking state) or the free end of the pin body 71 can be drawn out from the guide portion in the guide groove 720 (from the non-parking state to the parking state), the mounting portion can be located in the mounting hole to prevent the free end of the pin body 71 from passing through the guide portion in the, or when the locking device is drawn out from the guide portion in the guide groove 720, the entire locking device is moved.
It should be noted that the linear motion driving device 721 in the above embodiments may be a specific device such as a motor, but not limited thereto.
The embodiment of the invention also provides an automatic transmission, and the automatic transmission is provided with the hydraulic parking mechanism mentioned in the technical scheme.
Compared with the prior art, the automatic transmission provided by the embodiment of the invention has the following advantages:
the advantages of the automatic transmission and the hydraulic parking mechanism mentioned in the above technical scheme are the same as those of the prior art, and are not described again.
Specifically, the housing of the automatic transmission is fixedly connected with the outer wall of the hydraulic cylinder in the hydraulic parking mechanism in the technical scheme. For example, a hydraulic cylinder includes a cylinder body to which a cylinder head is attached, and the cylinder body is connected to a housing of an automatic transmission.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The utility model provides a hydraulic pressure parking mechanism, includes pneumatic cylinder (1), establishes parking piston (3) in pneumatic cylinder (1) and can locking and unblock automatic locking mechanism (7) of parking piston (3), parking piston (3) link to each other with the push rod that is equipped with parking cam (4), its characterized in that still including being used for the drive the push rod carries out linear motion's manual unlocking device along its axial.
2. The hydraulic parking mechanism according to claim 1, wherein the manual unlocking means comprises a manual part and a transmission part capable of driving a push rod to move linearly in an axial direction thereof under the control of the manual part.
3. The hydraulic parking mechanism according to claim 2, wherein the manual unlocking means is a cam mechanism, a rack and pinion mechanism or a worm and gear mechanism;
when manual unlocking means does during cam mechanism, cam mechanism includes as manual cam (82) of manual part and conduct transmission part's arch, the arch is established on the push rod, just protruding with the profile surface contact of manual cam (82), be equipped with the locking plane on the profile surface of manual cam (82), manual messenger during manual cam (82) rotate, manual cam (82) can drive protruding edge the push rod place direction removes, in order to drive the push rod removes, makes on the push rod parking cam and parking arm separation entering non-parking.
When the manual unlocking device is the gear rack mechanism, the gear rack mechanism comprises a manual gear serving as the manual part and a rack serving as the transmission part, the rack is meshed with the manual gear, the rack is arranged on the push rod, and the manual gear is meshed with the rack;
when the manual unlocking device is the worm gear and worm mechanism, the worm gear and worm mechanism comprises a manual worm as the manual part, a worm gear as the transmission part and a conversion mechanism capable of converting rotary motion into linear motion, the worm gear is meshed with the manual worm, and the worm gear is connected with the push rod through the conversion mechanism.
4. The hydraulic parking mechanism according to claim 2 or 3, characterized in that the push rod comprises a parking push rod (2) and an unlocking push rod (81) used for connecting the parking push rod (2) and a parking piston (3), the parking push rod (2) and the unlocking push rod (81) are hinged together, the parking cam (4) is arranged on the parking push rod (2), a connecting hole is formed in one end, connected with the unlocking push rod (81), of the parking push rod (2), a transmission part is arranged at one end, connected with the parking push rod (2), of the unlocking push rod (81), and one end, connected with the parking push rod (2), of the unlocking push rod (81) penetrates through the connecting hole, so that the protrusion is in contact with the manual cam (82).
5. The hydraulic parking mechanism according to claim 4, wherein the parking piston (3) partitions the interior of the hydraulic cylinder (1) into a first variable chamber (11) and a second variable chamber (12), the automatic locking mechanism (7) is provided in the first variable chamber (11), and the end of the unlocking push rod (81) connected to the parking piston (3) is provided on the side of the parking piston (3) located in the second variable chamber (12); wherein,
a first elastic connecting piece (110) is arranged in the first variable chamber (11) to push the parking piston (3) to enable the parking cam (4) to be in a parking state; the variable cavity of second (12) with set up oilhole (10) intercommunication on pneumatic cylinder (1) in order to promote during letting in hydraulic oil in the variable cavity of second (12) parking piston (3) drive unblock push rod (81) remove, unblock push rod (81) drive on parking push rod (2) parking cam (4) and parking arm separation.
6. The hydraulic parking mechanism according to claim 5, characterized in that said automatic locking mechanism (7) comprises a pin body (71) and a movable locking means (72); one end of the pin body (71) is a connecting end connected with the parking piston (3), and the other end of the pin body is a free end; a locking groove (710) with the same structure as a key groove is formed in the pin body (71), a guide groove (720) is formed in the movable locking device (72), and the guide groove (720) comprises a guide part for enabling the free end to penetrate through the movable locking device (72) and a locking convex part capable of being clamped with the locking groove (710) in a non-parking state;
in the parking state, the movable locking device (72) blocks the free end, and the parking piston (3) is kept locked; in the non-parking state, the movable locking device (72) moves so that the free end passes through the guide portion, and the locking convex portion engages with the locking concave groove (710).
7. The hydraulic parking mechanism according to claim 6, characterized in that the movable locking means (72) comprises a locking means (722) and a linear motion drive means (721), the guide slot (720) opening on the locking means (722); wherein,
the linear motion driving device (721) is positioned outside the hydraulic cylinder (1), one end of the locking device (722) is in contact with a power output end of the linear motion driving device (721), the other end of the locking device extends into the first variable chamber (11) in the hydraulic cylinder (1), and one end, which can be in contact with the power output end, of the locking device (722) is connected with the outer wall of the hydraulic cylinder (1) through a second elastic connecting piece (723);
the linear motion driving device (721) pushes the locking device (722) to move through the power output end, so that the free end can pass through the guide part in the non-parking state, and the second elastic connecting piece (723) drives the locking device (722) to move in the non-parking state, so that the locking convex part is clamped with the locking groove (710).
8. The hydraulic parking mechanism according to claim 7, characterized in that the hydraulic cylinder (1) is provided with mounting holes on the inner wall of the first variable chamber 11); the locking device (722) comprises a stress part, a working part and a mounting part which can be mounted in the mounting hole, wherein the stress part, the working part and the mounting part are sequentially connected; the stress part can be contacted with the power output end, and the guide groove (720) is arranged on the locking part.
9. An automatic transmission characterized in that the automatic transmission is provided with the hydraulic parking mechanism according to any one of claims 1 to 8.
10. An automatic transmission according to claim 9, characterized in that the housing of the automatic transmission is secured to the outer wall of the hydraulic cylinder (1) of the hydraulic parking mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201511023371.2A CN106931161B (en) | 2015-12-30 | 2015-12-30 | A kind of hydraulic halting mechanism and automatic transmission |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201511023371.2A CN106931161B (en) | 2015-12-30 | 2015-12-30 | A kind of hydraulic halting mechanism and automatic transmission |
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| CN106931161B CN106931161B (en) | 2019-06-18 |
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| CN201511023371.2A Active CN106931161B (en) | 2015-12-30 | 2015-12-30 | A kind of hydraulic halting mechanism and automatic transmission |
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| CN110360176A (en) * | 2019-06-18 | 2019-10-22 | 浙江吉利控股集团有限公司 | A kind of hydraulic actuating device and automobile parking mechanism |
| DE102018130485A1 (en) * | 2018-11-30 | 2020-06-04 | Schaeffler Technologies AG & Co. KG | Parking lock device for a transmission with a parking lock wheel |
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| CN113251144A (en) * | 2021-06-02 | 2021-08-13 | 杰锋汽车动力系统股份有限公司 | Parking device for automatic gearbox |
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