CN114412989A - Hydraulically driven parking mechanism, parking device and vehicle - Google Patents
Hydraulically driven parking mechanism, parking device and vehicle Download PDFInfo
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- CN114412989A CN114412989A CN202210029748.9A CN202210029748A CN114412989A CN 114412989 A CN114412989 A CN 114412989A CN 202210029748 A CN202210029748 A CN 202210029748A CN 114412989 A CN114412989 A CN 114412989A
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- parking
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- 230000007246 mechanism Effects 0.000 title claims abstract description 45
- 238000009434 installation Methods 0.000 claims abstract description 5
- 230000033001 locomotion Effects 0.000 claims description 15
- 210000003781 tooth socket Anatomy 0.000 claims description 4
- 230000005389 magnetism Effects 0.000 claims 1
- 230000009471 action Effects 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 9
- 238000003825 pressing Methods 0.000 description 7
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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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
- F16H63/3425—Parking lock mechanisms or brakes in the transmission characterised by pawls or wheels
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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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear-Shifting Mechanisms (AREA)
Abstract
The invention discloses a hydraulic drive type parking mechanism, a parking device and a vehicle, and relates to the technical field of parking mechanisms, wherein the hydraulic drive type parking mechanism comprises a support for integrated positioning and installation and ensuring an accurate working position; the push rod component comprises a push rod which can move linearly on the bracket; the roller assembly comprises a roller retainer arranged on the push rod and a second roller arranged on the roller retainer, and the second roller is used for abutting against the pawl to drive the pawl to act; the hydraulic assembly comprises a hydraulic cylinder fixed on the support, and a piston rod of the hydraulic cylinder is connected with the push rod so as to drive the push rod to move linearly, so that the second roller moves; and a locking assembly. The invention can drive the second roller to displace, the second roller is propped against the pawl to push the pawl to act, and the convex part on the pawl is embedded into or separated from the tooth groove on the gear, thereby realizing the parking function and the unlocking function.
Description
Technical Field
The invention relates to the technical field of parking mechanisms, in particular to a hydraulic drive type parking mechanism, a parking device and a vehicle.
Background
The parking mechanism is widely applied to various automobiles and is an important safety part. The parking mechanism is generally classified into four types, a hydraulic drive type, a pneumatic drive type, a motor drive type, and a manual mechanical type, according to the driving manner. The manual mechanical parking mechanism is widely applied to manual transmissions and automatic transmissions, and plays an important role in promoting the technical progress of automobiles. Since a conventional power vehicle equipped with an automatic transmission and an energy-saving vehicle equipped with an electromechanical coupler are often equipped with a hydraulic drive system, it is convenient to use a hydraulically driven parking mechanism. The pure electric vehicles are new energy vehicles represented by the general electric vehicles, and usually do not carry a hydraulic system, and a motor-driven parking mechanism is adopted. Pneumatic driving type parking mechanisms are commonly used in medium and large commercial vehicles.
The parking mechanism has the working functions of realizing mechanical locking after the vehicle stops, completing mechanical unlocking before the vehicle moves and providing locking guarantee when the vehicle creeps. According to the distribution of the work functions of all parts, the interior of the parking mechanism can be divided into three subsystems of ratchet wheel and pawl, pawl actuation and deceleration driving. The ratchet and pawl subsystem is used for achieving parking and unlocking functions, and meanwhile parameter setting is used for ensuring that misoperation and limit working conditions are not parked. The pawl actuation subsystem pushes the pawl to swing, so that the pawl is prevented from withdrawing after locking, and the functions of pseudo-locking energy storage, space motion conversion and the like are realized. The deceleration driving subsystem is responsible for providing driving force for parking and locking, and in some cases, the deceleration driving subsystem simultaneously provides functions of mechanical limit and the like.
Patent document (application No. CN201280048040.2, entitled transmission parking lock device) discloses a transmission parking lock device comprising an operating lever with an operating mechanism that can be moved substantially in translation and a locking lever with a locking mechanism that can be moved substantially in rotation, wherein, in order to engage the transmission parking lock device, the locking lever can be rotated from its rest position into its locking position by the movement of the operating lever, so that the locking mechanism engages into a recess of a transmission gear assigned to a transmission shaft, and means are provided which lift the operating mechanism of the operating lever from the locking lever in the rest position of the operating lever.
In the technical solution of the above patent document, the operation rod is also commonly called a push rod or a connecting rod; a locking lever, also commonly referred to as a locking arm or pawl, for effecting parking; the gearbox gear, which is arranged on the drive shaft of the vehicle, is usually also called a ratchet wheel. When the push rod is out of contact with the pawl and is maintained in the unlocked state of the parking mechanism, the operating lever is kept from accidental contact with the locking lever by means of the device. The above-mentioned device needs to carry out accurate location and installation respectively with the derailleur casing in order to realize the accurate relative position relation with action bars and locking lever. The technical scheme for accurately positioning and mounting the plurality of components relative to the transmission housing increases the machining precision of the components such as the housing, brings higher operation difficulty for avoiding mounting deviation, and further generates higher production cost, which is unfavorable. Meanwhile, the parking process is not stable enough.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the above-mentioned problems in the prior art. Therefore, the embodiment of the invention provides an integrated hydraulic driving type parking mechanism, the parking mechanism and a shell can meet the functional requirements through one-time positioning, the production cost is reduced, the production efficiency is improved and the parking stability is improved on the basis of ensuring complete functions.
The embodiment of the invention also provides a parking device with the hydraulic drive type parking mechanism.
The embodiment of the invention also provides a vehicle with the parking device.
According to an embodiment of a first aspect of the present invention, there is provided a hydraulically driven parking mechanism comprising a bracket for integrated positioning, mounting and ensuring a precise working position; the push rod component comprises a push rod which can linearly move on the bracket; the roller assembly comprises a roller retainer arranged on the push rod and a second roller arranged on the roller retainer, and the second roller is used for abutting against a pawl to drive the pawl to act; the hydraulic assembly comprises a hydraulic cylinder fixed on the bracket, and a piston rod of the hydraulic cylinder is connected with the push rod so as to drive the push rod to move linearly, so that the second roller moves; and the locking assembly comprises a locking plate and an electromagnet for controlling the locking plate to act in a hinged mode, so that the piston rod is locked after being extended or retracted.
The hydraulic drive type parking mechanism at least comprises the following beneficial effects: according to the technical scheme, a piston rod of the hydraulic cylinder extends out and retracts to drive the push rod to linearly move, the roller retainer on the push rod moves along with the piston rod and drives the second roller to displace, the second roller is abutted against the pawl to push the pawl to act, and the convex part on the pawl is embedded into or separated from a tooth groove on the gear, so that the parking function and the unlocking function are realized; and after the piston rod stretches out or retracts, the piston rod can be locked by the locking plate, the stability of the second roller on the action of the pawl is further improved, and the stability of the parking function and the unlocking function is improved. According to the hydraulic driving type parking mechanism, the hydraulic component, the push rod component, the roller component and the locking component are directly or indirectly arranged on the bracket and are integrally arranged, so that the functional requirements can be met by integrally positioning the hydraulic component, the push rod component, the roller component and the locking component at one time, and the working stability is further improved.
According to the embodiment of the first aspect of the invention, a piston is arranged in the hydraulic cylinder, the piston rod is connected to the piston, an oil chamber is formed in the hydraulic cylinder on one side of the piston to push the piston to extend out through oil, the hydraulic cylinder is provided with an oil hole communicated with the oil chamber, and a first return spring is arranged on the other side of the piston to enable the piston to retract and return after the oil chamber is decompressed.
According to an embodiment of the first aspect of the present invention, the piston rod is provided with two annular grooves in front and rear, the lock plate is hinged to the hydraulic cylinder, the electromagnet is arranged on one side of the lock plate to magnetically attract the lock plate to rotate, the lock plate is provided with a lock arm clamped into the annular groove to lock the piston rod after the lock plate rotates, and a second return spring is connected to the other side of the lock plate.
According to an embodiment of the first aspect of the present invention, the bracket has a first through hole for the push rod to pass through, so as to define an assembly position and a motion track of the push rod.
According to an embodiment of the first aspect of the present invention, the roller assembly further includes a first roller mounted on the roller holder, the first roller and the second roller are respectively located at two sides of the push rod, the bracket is provided with a first limiting plane to limit an assembling position and a movement track of the first roller, and the bracket is provided with a second limiting plane to limit an extreme movement position of the first roller.
According to the embodiment of the first aspect of the present invention, the roller holder is sleeved on the push rod, the push rod is provided with a flange for limiting the stroke of the roller holder, and the push rod is sleeved with a parking pressure spring for pressing the roller holder so as to move the roller holder towards the hydraulic cylinder.
According to an embodiment of the first aspect of the invention, the push rod and the piston rod are connected by a connecting pin.
According to an embodiment of the first aspect of the invention, the first through hole is not a circular hole.
According to an embodiment of a second aspect of the present invention, a parking device includes a ratchet wheel having a plurality of tooth grooves; the pawl is rotatably arranged, one side of the pawl is provided with a convex part embedded into the tooth socket, and the other side of the pawl is provided with a first clamping position and a second clamping position which are adjacent; and the hydraulically driven parking mechanism according to the embodiment of the first aspect of the present invention, the second roller abuts against the first detent when the piston rod is retracted, so that the convex member of the pawl is embedded in the tooth groove, and the second roller abuts against the second detent when the piston rod is extended, so that the convex member of the pawl is disengaged from the tooth groove.
The hydraulic drive type parking device at least comprises the following beneficial effects: according to the technical scheme, the piston rod of the hydraulic cylinder drives the push rod to move linearly by extending and retracting, the roller retainer on the push rod moves along with the piston rod and drives the second roller to displace, and the second roller abuts against the pawl so as to push the pawl to act; the second roller is abutted against the first clamping position when the piston rod retracts, the pawl is pushed to act, the convex part of the pawl is embedded into the tooth groove, and the parking function is completed; the second roller is abutted against the second clamping position when the piston rod extends out, the pawl is pushed to act, the convex part of the pawl is separated from the tooth groove, and the unlocking function is completed. The hydraulic driving type parking device disclosed by the invention is installed in a hydraulic integrated mode, and can integrally and once locate with the shell to meet the functional requirements.
According to an embodiment of the third aspect of the present invention, there is provided a vehicle including the parking device according to the embodiment of the second aspect of the present invention.
Drawings
The invention is further described below with reference to the accompanying drawings and examples;
FIG. 1 is a perspective view of a parking apparatus in an embodiment of the present invention;
FIG. 2 is a front view of the parking apparatus in the embodiment of the present invention;
FIG. 3 is a sectional view of the parking apparatus in the embodiment of the present invention;
FIG. 4 is a sectional view taken along line A-A of FIG. 2;
FIG. 5 is a perspective view of a bracket in an embodiment of the invention;
FIG. 6 is a front view of a bracket in an embodiment of the invention;
fig. 7 is a schematic structural diagram of two states in which the second roller is respectively inserted into the first detent and the second detent in the embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Fig. 1 to 7 show a hydraulically driven parking mechanism and a parking device. The hydraulically driven parking mechanism comprises a hydraulic assembly 10, a locking assembly 20, a roller assembly 30, a bracket 41 and a push rod assembly 50. The parking device comprises a ratchet 70, a pawl 60 and the above-mentioned hydraulically driven parking mechanism. The bracket 41 is used for integrated positioning, mounting and ensuring a precise working position.
Referring now to fig. 1 to 7, the push rod assembly 50 includes a push rod 51 linearly movable on the bracket 41. The roller assembly 30 includes a roller holder 33 mounted on the push rod 51 and a second roller 34 mounted on the roller holder 33, the second roller 34 being configured to abut against the pawl 60 to drive the pawl 60 to move. It will be appreciated that in the present application, the pawl 60 has a male member 61 for engaging a socket 71 in the ratchet wheel 7 for parking purposes, and the present embodiment enables the parking function by designing the second roller 34 to control the pawl 60.
As shown in fig. 1, the hydraulic assembly 10 includes a hydraulic cylinder 11 fixed on the bracket 41, and a piston rod 13 of the hydraulic cylinder 11 is connected to a push rod 51 to drive the push rod 51 to move linearly, thereby moving the second roller 34.
According to the technical scheme, the piston rod 13 of the hydraulic cylinder 11 extends and retracts to drive the push rod 51 to move linearly, and the roller retainer 33 on the push rod 51 moves along with the push rod and drives the second roller 34 to move. When the hydraulically driven parking mechanism of the present embodiment is installed in the parking device, the second roller 34 is installed against the pawl 60. The second roller 34 is abutted against the pawl 60 to urge the pawl 60 to act, and in a specific application, the convex part 61 of the pawl 60 is inserted into or disengaged from the tooth slot 71 of the gear 70 to realize the parking function and the unlocking function.
The locking assembly 20 includes a locking plate 21 hingedly disposed and an electromagnet 23 controlling the movement of the locking plate 21 to lock the piston rod 13 after the piston rod 13 is extended or retracted. And after the piston rod 13 extends or retracts, the locking plate 21 can lock the piston rod 13, so that the stability of the second roller on the action of the pawl is further improved, and the stability of the parking function and the unlocking function is improved. Further preferably, referring to fig. 4, the piston rod 13 is provided with two annular grooves in the front and rear directions as shown in fig. 3, only for better describing the structure of the present invention, but not for characterizing a certain direction, a locking plate 21 is hinged on the hydraulic cylinder 11, an electromagnet 23 is disposed at one side of the locking plate 21 to magnetically rotate the locking plate 21, the locking plate 21 has a locking arm 22 caught in the annular groove to allow the locking plate 21 to lock the piston rod 13 after rotation, and a second return spring 24 is connected to the other side of the locking plate 21. It can be understood that the two annular grooves in front and at the back of the piston rod 13 are a left dead point and a right dead point which are set according to two positions of parking and unlocking, when the piston rod 13 extends forwards and reaches the unlocking position, the electromagnet 23 is electrified to adsorb the locking plate 21 to rotate, so that the locking arm 22 is clamped into the annular groove at the back to be locked; when the vehicle needs to be parked, the electromagnet 23 is not electrified, the second return spring 24 pulls the locking plate 21 to return, the piston rod 13 retracts backwards to reach the parking position, the electromagnet 23 is electrified to adsorb the locking plate 21 to rotate, and the locking arm 22 is clamped into the front annular groove to be locked. In this embodiment, the electromagnet 23 is energized to attract the lock plate 21 to rotate, so that the lock plate 21 is in a locked state; the latch plate 21 is reset by the elastic force of the second return spring 24, so that the latch plate 21 is in the released state.
According to the hydraulic driving type parking mechanism, the hydraulic assembly 10, the locking assembly 20, the roller assembly 30 and the push rod assembly 50 are directly or indirectly arranged on the bracket 41 and are integrally arranged, and when the hydraulic driving type parking mechanism is arranged, the hydraulic driving type parking mechanism can integrally and integrally meet the functional requirement with a shell through one-time positioning. In this embodiment, the bracket 41 is used for integrated positioning and installation and ensures an accurate working position, and the hydraulically driven parking mechanism can be integrally positioned and installed through the bracket 41, thereby reducing the number of times of assembly and the number of parts and ensuring the accurate working position.
Specifically, a piston 12 is arranged in the hydraulic cylinder 11, a piston rod 13 is connected to the piston 12, an oil chamber 16 is formed in one side of the piston 12 and located in the hydraulic cylinder so as to push the piston 12 to extend out through oil, the hydraulic cylinder 11 is provided with an oil hole communicated with the oil chamber 16, and a first return spring 14 is installed on the other side of the piston 12 so as to enable the piston to retract and return after the oil chamber 16 is decompressed. Wherein, the rear end of the hydraulic cylinder 11 is provided with an end cover to form an oil chamber 16, and in addition, the annular periphery of the piston 12 is provided with a sealing ring.
It will be appreciated that, with reference to fig. 3, in order to achieve the unlocking function, high-pressure oil is introduced into the oil chamber 16 through the oil hole, the high-pressure oil pushes the piston 12 to move away from the end cover, i.e., in the forward direction as viewed in fig. 3, and then the unlocking driving force is transmitted to the push rod 51 through the piston rod 13, and then is further transmitted to the roller holder 33 by the push rod 51, so that the pressing force applied to the pawls 60 by the second roller 34 is gradually reduced. It will be appreciated by those skilled in the art that the pawl 60 is provided with a third return spring, not shown, which is urged by the third return spring to rotate in a direction away from the ratchet 70 and eventually out of contact with the ratchet 70 to effect unlocking.
To achieve the parking function, high-pressure oil is discharged from the hydraulic cylinder 11, the piston 12 is moved toward the end cover by the first return spring 14, i.e., backward as shown in fig. 3, and the piston rod 13 is moved by the push rod 51. In this embodiment, the roller holder 33 is fitted over the push rod 51, the push rod 51 is provided with a flange for limiting the stroke of the roller holder 33, and the push rod 51 is fitted with a parking pressure spring 52 for pressing the roller holder 33, so that the roller holder 33 is moved toward the hydraulic cylinder 11. The push rod 51 transmits the parking driving force to the parking compression spring 52 through the retaining ring 53 sleeved on the push rod, and then the parking compression spring 52 transmits the parking driving force to the roller retainer 33, so that the second roller 34 applies gradually increased pressing force to the pawl 60, the pawl 60 is pushed to rotate towards the ratchet wheel 70, and finally the convex structure 61 of the pawl 60 is embedded into the tooth groove 71 of the ratchet wheel 70, and the parking action is completed. The working method of pushing the piston to unlock and drain oil to park by adopting high-pressure oil brings the advantages of reducing the pressing force of the piston return spring and reducing the hydraulic driving force. Those skilled in the art will appreciate that the filling and draining of the hydraulic cylinder may be controlled by hydraulic valves, which are not described in detail herein.
It should be noted that, if the tooth-to-tooth state occurs during parking, the pawl cannot fall into the tooth socket, at this time, because the piston is already at the leftmost end under the action of the first return spring 14 of the hydraulic cylinder, the parking pressure spring 52 is under compression, the roller holder 33 will continuously receive the compression force of the parking pressure spring 52, as long as the ratchet 70 rolls for a certain angle, the tooth-to-tooth state will be released, and the pawl will be buckled into the tooth socket of the ratchet, so as to complete parking.
In one embodiment of the present invention, the bracket 41 has a first through hole 42 for the push rod 51 to pass through to define the assembly position and the movement track of the push rod 51. Specifically, the limit of the support 41 to the push rod 51 is to bend a limit plate, and the limit plate is provided with a first through hole 42. Further, the first through hole 42 is not a circular hole, and the push rod 51 is prevented from rotating during linear movement.
The bracket 41 is further provided with a plurality of pin holes 43 for positioning the hydraulic cylinders 11, and the hydraulic cylinders 11 are finally fastened and connected through the connecting holes 44 of the bracket 41.
Preferably, the roller assembly 30 further includes a first roller 31 installed at the roller holder 33, and the first roller 31 and the second roller 34 are respectively located at both sides of the push rod 51. The bracket 41 is provided with a first limiting plane 46 to limit the assembly position and the movement track of the first roller 31, the bracket 41 is provided with a second limiting plane 45 to limit the limit movement position of the first roller 31, and in particular, the bracket 41 is bent to form a limiting plate which is right-angled to form the first limiting plane 46 and the second limiting plane 45. The constraint arrangement of the first roller 31 can further improve the stability of the linear movement of the push rod 51, improve the control precision of the pawl 50, and bring the advantages of stable operation and small operation resistance. The first roller 31 is mounted to the roller holder 33 by a first cylindrical pin 32, and the second roller 34 is mounted to the roller holder 33 by a second cylindrical pin 35.
Further, the push rod 51 and the piston rod 13 are connected by a connecting pin 15. The advantages of accurate position control in two motion directions of parking and unlocking are brought.
The parking device of the present embodiment includes a ratchet 70, a pawl 60, and the above-described hydraulically driven parking mechanism. The ratchet 70 has a plurality of teeth 71, the teeth 71 are recessed, and the pawl 60 has a male member 61 fitted into the teeth 71. The rotationally arranged pawl 60, as mentioned above, is provided with a third return spring, which is a torsion spring, exerting a twisting force on the pawl 60, in particular an elastic force that urges the male part 61 of the pawl 60 away from the ratchet 70. The third return spring is not shown and the pawl 60 is naturally rotated away from the ratchet wheel 70 by the third return spring out of contacting relation with the ratchet wheel 70.
The parking device of the present embodiment controls the parking and unlocking by controlling the positional relationship of the pawl 60 and the ratchet 70. As shown in fig. 7, the other side of the pawl 60 is provided with a first detent and a second detent which are adjacent to each other; wherein, the solid line part indicates that the second roller 34 abuts against the first detent; the dashed line indicates that the second roller 34 abuts against the second detent.
It will be appreciated that, in order to achieve the parking function, high-pressure oil is discharged from the hydraulic cylinder 11, the piston rod 13 is retracted by the first return spring 14, the push rod 51 is moved backward, the parking compression spring 52 transmits the parking driving force to the roller holder 33, so that the second roller 34 applies an increasing pressing force to the pawl 60, and the second roller 34 abuts against the first detent when the piston rod 13 is retracted, so that the convex part 61 of the pawl 60 is inserted into the tooth groove 71, and the parking action is completed, as shown by the solid line part in fig. 7.
To achieve the unlocking function, high-pressure oil is introduced into the oil chamber 16 through the oil hole, the piston rod 13 extends under the action of the high-pressure oil, the push rod 51 moves forward, and then the push rod 51 further transmits the unlocking driving force to the roller retainer 33, so that the pressing force applied to the pawl 60 by the second roller 34 is gradually reduced, the pawl 60 rotates in the direction away from the ratchet wheel 70 under the action of the third return spring, the second roller 34 abuts against the second detent when the piston rod 13 extends, so that the convex part 61 of the pawl 60 is separated from the tooth groove 71, and the parking action is completed, as shown in the broken line part in fig. 7.
The embodiment also shows a vehicle comprising the parking device.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (10)
1. The utility model provides a hydraulic drive formula parking mechanism which characterized in that: comprises that
The bracket is used for integrated positioning and installation and ensures a precise working position;
the push rod component comprises a push rod which can linearly move on the bracket;
the roller assembly comprises a roller retainer arranged on the push rod and a second roller arranged on the roller retainer, and the second roller is used for abutting against a pawl to drive the pawl to act;
the hydraulic assembly comprises a hydraulic cylinder fixed on the bracket, and a piston rod of the hydraulic cylinder is connected with the push rod so as to drive the push rod to move linearly, so that the second roller moves; and
the locking assembly comprises a locking plate and an electromagnet for controlling the locking plate to move in an articulated mode, and the piston rod is locked after being stretched out or retracted.
2. The hydraulically driven parking mechanism of claim 1, wherein: the hydraulic cylinder is internally provided with a piston, a piston rod is connected to the piston, an oil cavity in the hydraulic cylinder is formed in one side of the piston to push the piston to extend out through oil, the hydraulic cylinder is provided with an oil hole communicated with the oil cavity, and a first return spring is installed on the other side of the piston to enable the piston to retract and reset after the oil cavity is decompressed.
3. The hydraulically driven parking mechanism of claim 2, wherein: be provided with two ring channels around the piston rod, the lock plate articulates on the pneumatic cylinder, the electro-magnet is arranged one side of lock plate to inhale the messenger through magnetism the lock plate rotates, the lock plate has the card and goes into the locking arm of ring channel, so that the lock plate locks after rotating the piston rod, lock plate opposite side is connected with second reset spring.
4. The hydraulically driven parking mechanism according to any one of claims 1 to 3, characterized in that: the bracket is provided with a first through hole for the push rod to pass through so as to limit the assembly position and the motion track of the push rod.
5. The hydraulically driven parking mechanism of claim 4, wherein: the roller assembly further comprises a first roller arranged on the roller retainer, the first roller and the second roller are respectively located on two sides of the push rod, the support is provided with a first limiting plane to limit the assembling position and the movement track of the first roller, and the support is provided with a second limiting plane to limit the limiting movement position of the first roller.
6. The hydraulically driven parking mechanism of claim 5, wherein: the roller retainer is sleeved on the push rod, the push rod is provided with a flange for limiting the stroke of the roller retainer, and the push rod is sleeved with a parking pressure spring for abutting against the roller retainer so that the roller retainer moves towards the direction of the hydraulic cylinder.
7. The hydraulically driven parking mechanism of claim 4, wherein: the push rod and the piston rod are connected through a connecting pin.
8. The hydraulically driven parking mechanism of claim 4, wherein: the first through hole is not a circular hole.
9. A parking device characterized in that: comprises that
A ratchet wheel having a plurality of splines;
the pawl is rotatably arranged, one side of the pawl is provided with a convex part embedded into the tooth socket, and the other side of the pawl is provided with a first clamping position and a second clamping position which are adjacent; and
the hydraulically driven parking mechanism of any one of claims 1 to 8, wherein the second roller abuts against a first detent when the piston rod is retracted to cause the male member of the pawl to engage the tooth slot, and the second roller abuts against a second detent when the piston rod is extended to cause the male member of the pawl to disengage the tooth slot.
10. A vehicle, characterized in that: comprising a parking device according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210029748.9A CN114412989A (en) | 2022-01-11 | 2022-01-11 | Hydraulically driven parking mechanism, parking device and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210029748.9A CN114412989A (en) | 2022-01-11 | 2022-01-11 | Hydraulically driven parking mechanism, parking device and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114412989A true CN114412989A (en) | 2022-04-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210029748.9A Pending CN114412989A (en) | 2022-01-11 | 2022-01-11 | Hydraulically driven parking mechanism, parking device and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114412989A (en) |
Cited By (1)
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Application publication date: 20220429 |