CN113330238B - Parking mechanism and dual-clutch transmission realizing parking function through shifting fork shaft driving - Google Patents
Parking mechanism and dual-clutch transmission realizing parking function through shifting fork shaft driving Download PDFInfo
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- CN113330238B CN113330238B CN201980089941.8A CN201980089941A CN113330238B CN 113330238 B CN113330238 B CN 113330238B CN 201980089941 A CN201980089941 A CN 201980089941A CN 113330238 B CN113330238 B CN 113330238B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 52
- 230000005540 biological transmission Effects 0.000 title claims abstract description 24
- 230000009977 dual effect Effects 0.000 claims abstract description 8
- 230000007935 neutral effect Effects 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 4
- 238000005452 bending Methods 0.000 description 2
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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
Abstract
A parking mechanism and a dual clutch transmission realizing a parking function through a shifting fork shaft drive. The parking mechanism comprises a shifting fork shaft (2), a ratchet wheel (6), a pawl (11), a conical block assembly (14) and a rocker arm (7), wherein one end (701) of the rocker arm (7) is connected to the shifting fork shaft (2), and the other end (702) of the rocker arm is connected to the conical block assembly (14); when the shifting fork shaft (2) moves from the parking gear position to other gear positions, the shifting fork shaft (2) drives one end (701) of the rocker arm (7) to move, the other end (702) of the rocker arm (7) drives the conical block assembly (14) to move, so that the conical block assembly (14) is changed from the contact of the large-diameter part (142) of the conical block assembly with the pawl (11) to the contact of the small-diameter part (141) of the conical block assembly with the pawl (11), and therefore the pawl (11) is allowed to rotate to release locking of the ratchet wheel (6), and when the shifting fork shaft (2) moves from other gear positions to the parking gear position, the other end (702) of the rocker arm (7) drives the conical block assembly (14) to move, so that the conical block assembly (14) is changed from the contact of the small-diameter part (141) of the pawl (11) to the contact of the large-diameter part (142) of the conical block assembly with the pawl (11), and therefore the pawl (11) rotates to lock the ratchet wheel (6).
Description
Technical Field
The present invention relates to a parking mechanism, and more particularly, to a parking mechanism that implements a parking function through a fork shaft drive and a dual clutch transmission including the same.
Background
CN107010036A discloses a method of determining a position, a control unit and a parking lock device. As shown in fig. 1 (corresponding to fig. 1 of CN 107010036A), the parking lock device comprises a drive means a configured as a spindle drive motor. The spindle B is optionally moved in the axial direction of the spindle B via a drive a. The spindle B is provided with a thread via which the spindle guide element C is controllably moved in the axial direction. Depending on the direction of rotation of the spindle B, the spindle guide element C moves in the closing direction D1 or in the opening direction D2 of the first operating element D. The first actuating element D is of substantially conical or frustoconical design, one end face of which is supported on the spindle guide element C and points in the closing direction D1 of the first actuating element D. The first actuating element D is prestressed by a first spring E, so that the associated prestressing force presses the first actuating element D in its closing direction D1.
A second actuating element F is also arranged on the spindle B, which second actuating element F is likewise movable in the axial direction of the spindle B. The second operating element F is preloaded by a second spring G. The second control element F is also of substantially conical or frustoconical design, with an end face of the second control element F facing the end face of the first control element D. The first operating element D and the second operating element F are accommodated in a substantially cylindrical sleeve H, by means of which sleeve H a linear movement in the axial direction is ensured.
The parking lock in fig. 1 further comprises an operating pawl I which is pretensioned in the unlocking direction K by a pawl spring J. The first operating member D is pushed in the opening direction D2 by the driving device a driving the spindle guide member C to allow the operating pawl I to be disengaged from the parking brake wheel L. The parking lock is achieved by the drive means a driving the spindle guide element C towards the closing direction D1, allowing the first spring E to push the first operating element D towards the closing direction D1, causing the operating pawl I to engage with the parking brake wheel L. Wherein the drive device a (spindle drive motor) is controlled by means of a program N via a control unit M.
As described above, in the parking lock apparatus, the driving device a (spindle driving motor) and the control unit M are required to achieve parking, which is costly and has poor integration.
Disclosure of Invention
The present invention is directed to overcome or at least alleviate the above-mentioned disadvantages of the prior art, and to provide a parking mechanism that can implement a parking function by means of a fork shaft drive without providing a driving device such as a motor, and a dual clutch transmission including the parking mechanism.
Provided is a parking mechanism for realizing a parking function by means of a fork shaft drive, comprising:
a fork shaft;
a ratchet wheel;
a pawl configured to engage with or disengage from a tooth of the ratchet wheel by rotating about a pawl axis, thereby locking or unlocking the ratchet wheel;
a tapered block assembly having a small diameter portion and a large diameter portion in contact with the pawl;
a rocker arm having one end connected to the yoke shaft and the other end connected to the cone block assembly,
wherein a portion of the tapered block assembly that contacts the pawl is switched between the large diameter portion and the small diameter portion when the fork shaft is switched between the parking position and the other shift position.
In at least one embodiment, when moving from the parking position to another gear position, the shift fork shaft drives the one end of the rocker arm to rotate in a first direction, the other end of the rocker arm drives the conical block assembly to move so that the conical block assembly is changed from the large diameter part to the small diameter part to be in contact with the pawl, and therefore the pawl is unlocked from the ratchet,
when the shifting fork shaft moves from other gear positions to a parking gear position, the shifting fork shaft drives the one end of the rocker arm to rotate in a second direction opposite to the first direction, and the other end of the rocker arm drives the conical block assembly to move so that the conical block assembly is changed from the small-diameter part to the large-diameter part to be in contact with the pawl, and therefore the pawl locks the ratchet.
In at least one embodiment, the pawl shaft is configured for fixed mounting to a transmission housing, the pawl is rotatably sleeved on the pawl shaft,
the parking mechanism further includes a support bracket configured to be fixed to the transmission case, and an intermediate portion of the rocker arm between the one end and the other end is rotatably mounted to the support bracket.
In at least one embodiment, the support bracket is fixed to the pawl shaft.
In at least one embodiment, the one end of the rocker arm is connected to the shift fork shaft by a connecting pin that passes through the shift fork shaft and a shift fork sleeved on the shift fork shaft.
In at least one embodiment, the shift fork is provided with a first long hole through which the connecting pin passes and which extends in an axial direction of the shift fork shaft.
In at least one embodiment, the one end of the rocker arm is provided with a second long hole extending intersecting with an axial direction of the fork shaft, and the connecting pin passes through the second long hole.
In at least one embodiment, the parking mechanism further includes a lock pin extending through the shift fork, the support bracket is provided with a support bracket recess configured to receive a first end of the lock pin, the shift fork is provided with a shift fork shaft recess configured to receive a second end of the lock pin,
the arrangement of the lock pin and the first long hole of the shifting fork enables that: the shifting fork moves between the neutral position and the driving gear position along with the shifting fork shaft, and when the shifting fork shaft moves to the parking gear position, the shifting fork still stays at the neutral position.
In at least one embodiment, when the shifting fork shaft is in the neutral position, two ends of the lock pin are respectively accommodated in the support frame concave part and the shifting fork shaft concave part,
during the process that the shifting fork shaft moves from the neutral position to the parking position, the second end of the lock pin is separated from the shifting fork shaft concave part, the first end of the lock pin enters the support frame concave part to lock the shifting fork,
in the process that the shifting fork shaft moves from the neutral position to the driving gear position, the first end of the lock pin is separated from the support frame concave part, and the second end of the lock pin enters the shifting fork shaft concave part.
In at least one embodiment, the support bracket and the rocker arm are disposed radially outward of and on the same side of two prongs of the fork.
In at least one embodiment, the small diameter portion and the large diameter portion are provided at one end in a length direction of the tapered block assembly, the other end in the length direction of the tapered block assembly is connected to the other end of the rocker arm,
the large diameter portion includes a sleeve movable along a length direction of the tapered block assembly, and the tapered block assembly further includes a charging spring disposed between the sleeve and the other end of the tapered block assembly.
In at least one embodiment, when the shift fork shaft is in the neutral position, the support frame concave part, the lock pin and the shift fork shaft concave part are in a straight line, the connecting pin is located at one axial side end part of the long hole of the shift fork,
in the process that the shifting fork shaft moves from a neutral position to a parking position, the shifting fork shaft moves towards the other end side of the shaft, the second end of the lock pin is separated from the shifting fork shaft concave part, the first end of the lock pin enters the support frame concave part to lock the shifting fork, so that the shifting fork does not move along with the shifting fork shaft, the shifting fork shaft drives the one end of the rocker arm to move towards the other end side of the shifting fork shaft in the axial direction through the connecting pin so as to enable the rocker arm to rotate in the second direction, the other end of the rocker arm drives the conical block assembly to move towards the one end side of the shifting fork shaft in the axial direction so as to enable the conical block assembly to change from the contact between the small-diameter part and the pawl to the contact between the large-diameter part and the pawl, so that the pawl rotates to lock the ratchet,
when the shifting fork shaft is positioned at the parking gear position, the connecting pin is positioned at the other axial end part of the long hole of the shifting fork,
in the process that the shifting fork shaft moves from the parking gear position to the neutral gear position, the shifting fork is locked by the lock pin and the support frame concave part, the shifting fork shaft moves towards one end side in the axial direction relative to the shifting fork, the shifting fork shaft drives the one end of the rocker arm to move towards one end side in the axial direction of the shifting fork shaft through the connecting pin so that the rocker arm rotates along the first direction, the other end of the rocker arm drives the conical block assembly to move towards the other end side in the axial direction of the shifting fork shaft so that the conical block assembly is changed from the contact of the large-diameter part and the pawl to the contact of the small-diameter part and the pawl, and therefore the pawl is allowed to rotate to release the locking of the ratchet wheel,
in the process that the shifting fork shaft moves from the neutral position to the driving position, the shifting fork shaft drives the shifting fork to move towards one axial end side through the connecting pin, the first end of the lock pin is separated from the support frame concave part, the second end of the lock pin enters the shifting fork shaft concave part, the shifting fork shaft drives the one end of the rocker arm to move towards one axial end side of the shifting fork shaft through the connecting pin so as to enable the rocker arm to rotate along the first direction, the other end of the rocker arm drives the conical block assembly to move towards the other axial end side of the shifting fork shaft, the small diameter part of the conical block assembly is in contact with the pawl, and therefore the pawl is kept in a state of releasing locking of the ratchet wheel,
when the shifting fork shaft is positioned at a driving gear position, the connecting pin is positioned at the axial end part of one side of the long hole of the shifting fork,
in the process that the shifting fork shaft moves from the driving gear position to the neutral gear position, the shifting fork shaft drives the shifting fork to move towards the other end side in the axial direction through the lock pin, the shifting fork shaft drives the one end of the rocker arm to move towards the other end side in the axial direction of the shifting fork shaft through the connecting pin so that the rocker arm rotates along the second direction, the other end of the rocker arm drives the conical block assembly to move towards the one end side in the axial direction of the shifting fork shaft, the small diameter portion of the conical block assembly is in contact with the pawl, and the pawl is kept in a state of releasing locking of the ratchet wheel.
A dual clutch transmission is provided that includes a parking mechanism according to the present invention that implements a parking function through a declutch shift shaft drive.
In at least one embodiment, the ratchet is mounted to a transmission output shaft, the dual clutch transmission has an even number of forward gears, and the shift fork is responsible for only reverse or one forward gear.
The invention provides a parking mechanism for realizing a parking function through driving of a shifting fork shaft and a double-clutch transmission comprising the parking mechanism. The parking mechanism of the present invention may be particularly suitable for a dual clutch transmission.
Drawings
Fig. 1 shows a schematic representation of a known parking lock.
Fig. 2 shows an exploded perspective view of a parking mechanism according to an embodiment of the present invention.
Fig. 3 shows a perspective view of the parking mechanism in fig. 2.
Fig. 4A shows a perspective view of the parking mechanism in fig. 2 in the 1 st gear.
Fig. 4B, 4C, and 4D show partially enlarged views of the parking mechanism in fig. 4A.
Fig. 5A is a perspective view showing the parking mechanism in fig. 2 in the N range.
Fig. 5B, 5C, and 5D show partially enlarged views of the parking mechanism in fig. 5A.
Fig. 6A shows a perspective view of the parking mechanism in fig. 2 in the P range.
Fig. 6B, 6C, and 6D show partially enlarged views of the parking mechanism in fig. 6A.
List of reference numerals
A driving device; b, a main shaft; a C spindle guide element; d a first operating element; e a first spring; f a second operating element; g a second spring; h, a sleeve; i operating the pawl; j pawl spring; k unlocking direction; l parking brake wheel; an M control unit; n procedure;
1, locking a pin; 2, a shifting fork shaft; 201 connecting pin holes; 202 a fork shaft recess; 3, supporting a frame; 301 a main body; 302 a first bend; 303 a second bending part; 304 support frame recesses; 4 connecting pins; 5, shifting a fork; 501 a long hole (first long hole) of a shifting fork; 502 lock pin holes; 6, ratchet wheel; 7 rocker arms; 701 one end of a rocker arm; 702 the other end of the rocker arm; 703 a long hole (second long hole) of the rocker arm; 8, riveting; 9 returning the torsion spring; 10 a support plate; 11 a pawl; 12 a ratchet shaft; 13 a guide plate; 14 a conical block assembly; 141 small diameter part; a 142 large diameter portion; 15, a screw; 16 connecting rivets; AX is axial.
Detailed Description
Exemplary embodiments of the present invention are described below with reference to the accompanying drawings.
As shown in fig. 2 and 3, an embodiment of the present invention provides a parking mechanism (hereinafter, referred to as a "parking mechanism") that implements a parking function by a fork shaft drive. The parking mechanism comprises a shifting fork shaft 2, a ratchet wheel 6, a pawl 11, a conical block assembly 14 and a rocker arm 7.
The shifting fork shaft 2 can be supported by the gearbox shell, and the shifting fork 5 is sleeved on the shifting fork shaft 2. The ratchet 6 may be mounted on the gearbox output shaft.
The pawl 11 engages with or disengages from the teeth of the ratchet wheel 6 by rotating about the pawl shaft 12, thereby locking or unlocking the ratchet wheel 6. In a specific but non-limiting example, the pawl shaft 12 is fixedly mounted to the transmission housing, the pawl 11 is rotatably fitted over the pawl shaft 12, specifically, the pawl shaft 12 is mounted in a mounting hole of the transmission housing, the support plate 10 and the pawl shaft 12 are fitted together by, for example, interference fit, and the support plate 10 and the pawl shaft 12 are fixed together to the transmission housing by screws. The pawl shaft 12 may be disposed substantially parallel to the yoke shaft 2 and the cone block assembly 14.
The tapered block assembly 14 has a small diameter portion 141 and a large diameter portion 142 that can be brought into contact with the tip end portion of the pawl 11. In a specific but non-limiting example, the guide plate 13 is mounted on the transmission housing by, for example, screws, and the small diameter portion 141 or the large diameter portion 142 of one end of the tapered block assembly 14 is sandwiched between the tip end portion of the pawl 11 and the guide plate 13. The large diameter portion 142 may include a sleeve that is movable along the length (axial direction) of the cone assembly 14, and a charging spring may be provided between the sleeve and the other end of the cone assembly 14.
It should be understood that the small diameter portion 141 and the large diameter portion 142 need not be strictly cylindrical, as long as the size of the large diameter portion 142 is larger than that of the small diameter portion 141 in the direction in which the tip end portion of the pawl 11 and the guide plate 13 oppose each other.
One end 701 of the rocker arm 7 is connected to the fork shaft 2 and the other end 702 of the rocker arm 7 is connected to the other end of the cone block assembly 14.
When the shift fork 2 moves from the parking position to the other shift position, the shift fork 2 moves one end 701 of the rocker arm 7 in the G1 direction on the axial direction AX of the shift fork 2 toward one end side (left side in fig. 3) of the axial direction of the shift fork 2 to rotate the rocker arm 7 in the first direction (counterclockwise direction in fig. 3), and the other end 702 of the rocker arm 7 moves the tapered cone assembly 14 to change the tapered cone assembly 14 from the large diameter portion 142 contacting the pawl 11 to the small diameter portion 141 contacting the pawl 11, thereby allowing the pawl 11 to rotate to unlock the ratchet 6 (see, for example, fig. 4A and 4D).
In the present invention, the forward gear and the reverse gear are collectively referred to as a drive gear, and the drive gear and the neutral gear are collectively referred to as (other than the parking gear) "other gear".
When the shift lever 2 is moved from the other shift position to the parking position, the shift lever 2 moves the one end 701 of the rocker arm 7 in the GP direction on the axial direction AX of the shift lever 2 toward the other end side (right side in fig. 3) of the axial direction of the shift lever 2 to rotate the rocker arm 7 in a second direction (clockwise direction in fig. 3) opposite to the first direction, and the other end 702 of the rocker arm 7 moves the taper block assembly 14 to change the taper block assembly 14 from the contact of the small diameter portion 141 with the pawl 11 to the contact of the large diameter portion 142 with the pawl 11, thereby rotating the pawl 11 to lock the ratchet 6 (see, for example, fig. 6A and 6D).
Referring to fig. 2 and 3, the parking mechanism may further include a support bracket 3 fixed to the transmission case, and an intermediate portion of the rocker arm 7 between one end 701 and the other end 702 is rotatably mounted to the support bracket 3.
In a specific but non-limiting example, the support bracket 3 is fixed to the pawl shaft 12, and specifically, the support bracket 3 includes a main body 301, a first bent portion 302 and a second bent portion 303 that are bent with respect to the main body 301. The first bent portion 302 and the second bent portion 303 are bent in different directions, and the second bent portion 303 is fixed together by the screw 15 and the ratchet shaft 12. The support 3 may be substantially U-shaped as viewed in the axial direction AX of the fork shaft 2.
In another specific but non-limiting example, the intermediate portion (not necessarily the central portion) of the rocker arm 7 is riveted to the body 301 of the support bracket 3, for example by means of a rivet 8, and is free to rotate with respect to the support bracket 3. The support frame 3 and the rocker arm 7 may be arranged radially outside and on the same side of the two prongs of the fork 5. Radially outward here means that the carrier 3 and the rocker arm 7 are not between the two prongs when viewed in the axial direction AX.
In another specific but non-limiting example, one end 701 of the rocker arm 7 is connected to the fork shaft 2 by a connecting pin 4, the connecting pin 4 passing through a connecting pin hole 201 (see fig. 2) of the fork shaft 2 and a fork 5 fitted over the fork shaft 2. Specifically, the yoke 5 is provided with two long holes (for example, kidney-shaped holes) 501 through which the connecting pin 4 passes and which extend along the axial direction AX of the yoke shaft 2.
In another specific but non-limiting example, the other end 702 of the rocker arm 7 is riveted together by a connecting rivet 16 and the other end of the conical block assembly 14.
The parking mechanism may further include a lock pin 1 extending through a lock pin hole 502 (refer to fig. 2) of the shift fork 5, and the lock pin 1 may extend substantially perpendicular to the connecting pin 4. The support 3 is provided with a support recess 304 (see e.g. fig. 5C) capable of receiving the first end 1A of the lock pin 1, and the fork shaft 2 is provided with a fork shaft recess 202 (see e.g. fig. 4C) capable of receiving the second end 1B of the lock pin 1. The supporting frame recess 304 is formed on the first bending portion 302. The parking mechanism may further comprise a return torsion spring 9 fitted around the pawl shaft 12, one end of the return torsion spring 9 being fixed to the support plate 10, and the other end of the return torsion spring 9 being connected to the pawl 11 and applying a torque to the pawl 11 to urge the pawl 11 to disengage from the ratchet 6. A long hole (for example, a kidney-shaped hole) 703 of one end of the rocker arm 7 is fitted with the connecting pin 4.
Fig. 4A shows a perspective view of the parking mechanism in fig. 2 in the 1 st gear. Fig. 4B, 4C, and 4D show partially enlarged views of the parking mechanism in fig. 4A. Fig. 5A shows a perspective view of the parking mechanism in fig. 2 in the N range (i.e., neutral). Fig. 5B, 5C, and 5D show partially enlarged views of the parking mechanism in fig. 5A. Fig. 6A shows a perspective view of the parking mechanism in fig. 2 in the P range (i.e., parking range). Fig. 6B, 6C, and 6D show partially enlarged views of the parking mechanism in fig. 6A.
It should be understood that, for ease of understanding, some of the structures are omitted from some of the drawings, for example, in fig. 4B, the support bracket 3 and the swing arm 7 are omitted, and in fig. 4D, the support bracket 3 is omitted.
The operation of the parking mechanism of the present embodiment is described below with reference to fig. 3 to 6D.
Referring to fig. 5A to 5D, when the fork 2 is in the neutral position, the holder recess 304, the lock pin 1, and the fork recess 202 are aligned, and the connecting pin 4 is located at one axial end of the long hole 501 of the fork 5.
When 1 gear is engaged from the N gear, the shift rail 2 moves in the G1 direction toward one axial end side thereof (left side in fig. 5A to 5D) by, for example, hydraulic pressure, the shift rail 2 moves the shift fork 5 toward the one axial end side via the connecting pin 4, the first end 1A of the lock pin 1 is disengaged from the holder recess 304, and the second end 1B of the lock pin 1 enters the shift rail recess 202.
It can be seen that when 1 gear is shifted from the N gear, the shift fork 5 is driven by the connecting pin 4 to shift into the 1 gear, and the lock pin 1 is pushed into the fork shaft recess 202 of the fork shaft 2 by the support frame 3, so that the fork shaft 2 and the shift fork 5 are locked.
Referring to fig. 4A to 4D, when the shift fork shaft 2 is in the drive position of, for example, 1 st gear, the connecting pin 4 is located at one axial end of the elongated hole 501 of the shift fork 5.
When the 1 st gear is released and the N-range is entered, the shift rail 2 is moved toward the other axial end side thereof (the right side in fig. 3 and 4A to 4D) in the GP direction by, for example, hydraulic pressure, and the shift rail 5 is also moved toward the other axial end side of the shift rail 2 in the GP direction since the lock pin 1 locks the shift rail 2 and the shift fork 5.
When the P range is shifted from the N range, the shift rail 2 moves toward the other axial end side (the right side in fig. 5A to 5D) thereof in the GP direction by, for example, hydraulic pressure, the second end 1B of the lock pin 1 is disengaged from the shift rail recess 202, that is, the lock pin 1 is pushed into the holder recess 304 of the holder 3 by the shift rail 2, the first end 1A of the lock pin 1 enters the holder recess 304 to lock the shift fork 5, and the shift fork 5 is fixed so as not to move in the axial direction AX together with the shift rail 2. Due to the long hole 501 on the shifting fork 5, the shifting fork shaft 2 can move to the other axial end side of the shifting fork shaft 2 along the GP direction and drive the rocker arm 7 to rotate around the rivet 8 through the connecting pin 4, the rocker arm 7 drives the conical block assembly 14 to move to one axial end side (left side in fig. 5A to 5D) of the shifting fork shaft 2 along the G1 direction through the connecting rivet 16, the large diameter part 142 of the conical block assembly 14 enters between the pawl 11 and the guide plate 13, and the pawl 11 is pushed to lock the ratchet 6 to achieve parking.
Referring to fig. 6A to 6D, in the P range, the connecting pin 4 is located at the other axial end of the long hole 501 of the yoke 5, and the second end 1B of the lock pin 1 is disengaged from the yoke shaft recess 202. It should be understood that in fig. 6B only the locking pin 1 is not shown and does not mean that the locking pin 1 does not protrude from the locking pin hole 502.
When the P range is released, the shift rail 2 is moved in the G1 direction toward one end side (left side in fig. 6A to 6D) in the axial direction thereof by, for example, hydraulic pressure, and the shift fork 5 is held by the lock pin 1, so that the shift fork 5 is held stationary. The shift fork shaft 2 drives the connecting pin 4 to move in the long hole 501 of the shift fork 5, the connecting pin 4 drives the rocker arm 7 to rotate around the rivet 8, the rocker arm 7 drives the conical block assembly 14 to move towards the other axial end side of the shift fork shaft 2 along the GP direction through the connecting rivet 16, the large-diameter portion 142 of the conical block assembly 14 is separated from the space between the pawl 11 and the guide plate 13, and the pawl 11 unlocks the ratchet 6 under the action of the return torsion spring 9.
In a dual clutch transmission with an even number of forward gears, there is one synchronizer side (axial side) without a gear, in other words, there is one fork that is responsible for only one gear. The shift fork 5 according to the invention is preferably the shift fork which is responsible for only one gear, so that the situation in which no gear is present on one side of the respective synchronizer can be fully utilized. It should be understood that the fork may be a fork of any gear responsible for a forward gear or a reverse gear. In the above, the 1 st gear is taken as an example, and the 1 st gear may be replaced by another driving gear.
In the present invention, parking is achieved by transmitting the driving force on the side of the fork shaft 2 to the cone block assembly through the rocker arm 7. A driving device such as a motor may not be provided for the drive mechanism, so that the design can be simplified, the cost can be reduced, and the integration level can be improved.
The parking mechanism of the invention can be applied to vehicles, in particular to a double-clutch transmission of the vehicles.
Of course, the present invention is not limited to the above-described embodiments, and those skilled in the art can make various modifications to the above-described embodiments of the present invention without departing from the scope of the present invention under the teaching of the present invention.
Claims (13)
1. A parking mechanism for realizing a parking function by means of shift fork shaft driving, comprising:
the shifting fork shaft (2) can move along the axial direction of the shifting fork shaft to drive the shifting fork to switch gears;
a ratchet (6);
a pawl (11) configured to engage with or disengage from teeth of the ratchet wheel (6) by rotating about a pawl shaft (12), thereby locking or unlocking the ratchet wheel (6);
a tapered block assembly (14) having a small diameter portion (141) and a large diameter portion (142) that contact the pawl (11);
a rotatable rocker arm (7), one end (701) of the rocker arm (7) being connected to the fork shaft (2), the other end (702) of the rocker arm (7) being connected to the cone block assembly (14),
wherein a portion of the cone block assembly (14) that contacts the pawl (11) is switched between the large diameter portion (142) and the small diameter portion (141) when the fork shaft (2) is switched between the parking position and the other gear position, the parking mechanism further comprising a support bracket (3) configured for fixing to a transmission case, an intermediate portion of the rocker arm (7) between the one end (701) and the other end (702) being rotatably mounted to the support bracket (3).
2. Parking mechanism according to claim 1, wherein, when moving from the parking position to the other gear position, the fork shaft (2) rotates the one end (701) of the rocker arm (7) in a first direction, the other end (702) of the rocker arm (7) moves the conical mass assembly (14) to change the conical mass assembly (14) from the large diameter portion (142) contacting the pawl (11) to the small diameter portion (141) contacting the pawl (11), thereby releasing the pawl (11) from locking the ratchet (6),
when the shift fork shaft (2) moves from other gear positions to a parking gear position, the shift fork shaft (2) drives the one end (701) of the rocker arm (7) to rotate in a second direction opposite to the first direction, and the other end (702) of the rocker arm (7) drives the conical block assembly (14) to move so that the conical block assembly (14) is changed from the contact of the small-diameter part (141) and the pawl (11) to the contact of the large-diameter part (142) and the pawl (11), and therefore the pawl (11) locks the ratchet (6).
3. The parking mechanism according to claim 1, wherein the pawl shaft (12) is configured for fixed mounting to a gearbox housing, the pawl (11) being rotatably sleeved to the pawl shaft (12).
4. The parking mechanism according to claim 3, wherein the support bracket (3) is fixed to the pawl shaft (12).
5. The parking mechanism according to any of claims 1 to 4, wherein said one end (701) of the rocker arm (7) is connected to the fork shaft (2) by means of a connecting pin (4), said connecting pin (4) passing through the fork shaft (2) and a fork (5) sleeved on the fork shaft (2).
6. The parking mechanism according to claim 5, wherein the fork (5) is provided with a first long hole (501) through which the connecting pin (4) passes and which extends in the axial direction (AX) of the fork shaft (2).
7. The parking mechanism according to claim 5, wherein the one end (701) of the rocker arm (7) is provided with a second long hole (703) extending intersecting the axial direction (AX) of the fork shaft (2), the connecting pin (4) passing through the second long hole (703).
8. The parking mechanism according to claim 6, wherein the parking mechanism further comprises a lock pin (1) extending through the shift fork (5), the support bracket (3) is provided with a support bracket recess (304) adapted to receive a first end (1A) of the lock pin (1), the shift fork shaft (2) is provided with a shift fork shaft recess (202) adapted to receive a second end (1B) of the lock pin (1),
through the arrangement of the lock pin (1) and the first long hole (501) of the shifting fork (5), the following steps are carried out: the shifting fork (5) moves between the neutral position and the running gear position along with the shifting fork shaft (2), and when the shifting fork shaft (2) moves to the parking gear position, the shifting fork (5) still stays at the neutral position.
9. The parking mechanism according to claim 8, wherein both ends of the lock pin (1) are respectively received in the holder recess (304) and the fork shaft recess (202) when the fork shaft (2) is in a neutral position,
in the process that the shifting fork shaft (2) moves from a neutral position to a parking position, the second end (1B) of the lock pin (1) is separated from the shifting fork shaft concave part (202), the first end (1A) of the lock pin (1) enters the support frame concave part (304) to lock the shifting fork (5),
in the process of moving the declutch shift shaft (2) from a neutral position to a driving position, a first end (1A) of the lock pin (1) is disengaged from the support frame recess (304), and a second end (1B) of the lock pin (1) enters the declutch shift shaft recess (202).
10. The parking mechanism according to any one of claims 1 to 4, wherein the support bracket (3) and the rocker arm (7) are arranged radially outside and on the same side of two prongs of the fork (5).
11. The parking mechanism according to any one of claims 1 to 4, wherein the small diameter portion (141) and the large diameter portion (142) are provided at one end in a length direction of the tapered block assembly (14), the other end in the length direction of the tapered block assembly (14) being connected to the other end (702) of the rocker arm (7),
the large diameter portion (142) includes a sleeve movable along a length direction of the tapered block assembly (14), and the tapered block assembly (14) further includes a charging spring provided between the sleeve and the other end of the tapered block assembly (14) in the length direction.
12. A dual clutch transmission comprising a parking mechanism for parking function by means of fork shaft drive as claimed in any one of claims 1 to 11.
13. Double-clutch transmission according to claim 12, wherein the ratchet wheel (6) is mounted to a transmission output shaft, the double-clutch transmission having an even number of forward gears, the fork (5) being responsible for only the reverse gear or one forward gear.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2019/083235 WO2020211039A1 (en) | 2019-04-18 | 2019-04-18 | Parking mechanism for realizing parking function by shift fork shaft driving, and dual-clutch transmission |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113330238A CN113330238A (en) | 2021-08-31 |
| CN113330238B true CN113330238B (en) | 2023-02-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980089941.8A Active CN113330238B (en) | 2019-04-18 | 2019-04-18 | Parking mechanism and dual-clutch transmission realizing parking function through shifting fork shaft driving |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113330238B (en) |
| WO (1) | WO2020211039A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007261357A (en) * | 2006-03-28 | 2007-10-11 | Isuzu Motors Ltd | Parking lock device in transmission |
| JP2010241256A (en) * | 2009-04-06 | 2010-10-28 | Toyota Motor Corp | Parking device |
| CN103711900A (en) * | 2013-12-31 | 2014-04-09 | 长城汽车股份有限公司 | Parking mechanism |
| CN104006157A (en) * | 2014-05-30 | 2014-08-27 | 长城汽车股份有限公司 | Parking mechanism of automobile transmission |
| CN106051152A (en) * | 2016-07-05 | 2016-10-26 | 重庆长安汽车股份有限公司 | Parking and gear-shifting executing mechanism for automatic transmission |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101463901B (en) * | 2007-12-17 | 2012-11-21 | 比亚迪股份有限公司 | Parking and shifting actuating mechanism |
-
2019
- 2019-04-18 CN CN201980089941.8A patent/CN113330238B/en active Active
- 2019-04-18 WO PCT/CN2019/083235 patent/WO2020211039A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007261357A (en) * | 2006-03-28 | 2007-10-11 | Isuzu Motors Ltd | Parking lock device in transmission |
| JP2010241256A (en) * | 2009-04-06 | 2010-10-28 | Toyota Motor Corp | Parking device |
| CN103711900A (en) * | 2013-12-31 | 2014-04-09 | 长城汽车股份有限公司 | Parking mechanism |
| CN104006157A (en) * | 2014-05-30 | 2014-08-27 | 长城汽车股份有限公司 | Parking mechanism of automobile transmission |
| CN106051152A (en) * | 2016-07-05 | 2016-10-26 | 重庆长安汽车股份有限公司 | Parking and gear-shifting executing mechanism for automatic transmission |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020211039A1 (en) | 2020-10-22 |
| CN113330238A (en) | 2021-08-31 |
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