CN214367693U - Automatic gearbox's parking mechanism and automatic gearbox - Google Patents
Automatic gearbox's parking mechanism and automatic gearbox Download PDFInfo
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- CN214367693U CN214367693U CN202120247859.8U CN202120247859U CN214367693U CN 214367693 U CN214367693 U CN 214367693U CN 202120247859 U CN202120247859 U CN 202120247859U CN 214367693 U CN214367693 U CN 214367693U
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Abstract
The utility model provides an automatic gearbox's parking mechanism and automatic gearbox, this parking mechanism includes: a motor drive assembly; the gear shifting hub is connected with the motor driving component; one end of the gear shifting block is connected with the gear shifting hub through a motion conversion structure; the reverse gear decoupling assembly comprises a shifting fork shaft and a reverse gear shifting fork, the other end, far away from the gear shifting hub, of the gear shifting block is connected with the shifting fork shaft, the shifting fork shaft makes linear reciprocating motion along with the gear shifting block, the reverse gear shifting fork is arranged on the shifting fork shaft and connected with a reverse gear synchronizer, and the reverse gear shifting fork pushes the reverse gear synchronizer to move to shift gears; the parking shifting fork is connected with the shifting fork shaft and/or the shifting block; the parking assembly comprises a parking pawl and a parking ratchet wheel, and the parking shifting fork pushes the parking pawl to move to be matched with the parking ratchet wheel. The utility model discloses a motor simultaneous control shifts and parking mechanism practices thrift motor and motor control unit, reduces the gearbox and arranges the space, is favorable to arranging of gearbox, reduces system control and structure complexity, reduce cost.
Description
Technical Field
The utility model relates to a gearbox technical field, in particular to automatic transmission's parking mechanism and automatic transmission.
Background
In order to enable the automatic transmission to be capable of achieving safe parking by engaging a low gear after parking like a manual transmission, a parking mechanism capable of achieving locking of wheel power is generally added in the automatic transmission. The commonly known P-gear device of the parking mechanism is a device for locking the whole transmission system in the automatic gearbox and preventing the automobile from sliding accidentally. The automobile can be parked on a flat ground or an inclined slope without time limitation.
According to the requirements of GB7258-2017 national Standard for operating safety and technical Condition of Motor vehicles, when an electronic control device is used for parking braking, the locking device is a pure mechanical device, so that the locking device still can be continuously effective in the case of power failure. The parking mechanism of the automatic gearbox existing in the current market is mainly divided into two categories, namely hydraulic drive and motor drive. The hydraulic drive parking mechanism has the advantages of complex structure, high technical difficulty and high cost; the motor-driven parking mechanism is widely applied due to high reliability and high efficiency, and is easy to control and integrate with the gear shifting motor mechanism.
However, in the existing technology of motor-driven parking mechanism, the driving of the parking mechanism often needs to separately set a motor and a speed reducing mechanism, the structure is complex, the arrangement space is enlarged, the complexity of gearbox control is increased, and the cost is high.
SUMMERY OF THE UTILITY MODEL
Based on this, the utility model aims at providing an automatic transmission's parking mechanism and automatic transmission to solve current parking mechanism and can lead to the whole complicated, with high costs technical problem of gearbox.
According to the utility model discloses among the middle automatic transmission's parking mechanism, parking mechanism includes:
a motor driving assembly providing a rotational driving force;
a shift hub connected to the motor drive assembly to rotate by the rotational drive force;
one end of the gear shifting block is connected with the gear shifting hub through a motion conversion structure, and the motion conversion structure converts the rotary motion of the gear shifting hub into the linear reciprocating motion of the gear shifting block;
the reverse gear decoupling assembly comprises a shifting fork shaft and a reverse gear shifting fork, the other end, far away from the gear shifting hub, of the gear shifting block is connected with the shifting fork shaft, the shifting fork shaft follows the gear shifting block to do linear reciprocating motion, the two motion directions of the linear reciprocating motion are a parking direction and a reverse gear direction respectively, the reverse gear shifting fork is arranged on the shifting fork shaft and connected with a reverse gear synchronizer, and the reverse gear shifting fork pushes the reverse gear synchronizer to move to shift gears when the reverse gear shifting fork follows the shifting fork shaft to do linear motion towards the reverse gear direction;
the parking shifting fork is connected with the shifting fork shaft and/or the shifting block;
the parking assembly comprises a parking pawl and a parking ratchet wheel, the parking shifting fork follows the shifting fork shaft towards when in linear motion in the parking direction, the parking pawl is pushed to move to be matched with the parking ratchet wheel.
Preferably, the motion conversion structure comprises a spiral groove and a sliding block which are in sliding fit, the spiral groove is formed in the outer side wall of the gear shifting hub, and the sliding block is arranged on the gear shifting block.
Preferably, the parking shifting fork is connected with a push rod, a conical block is arranged on the push rod, and when the parking shifting fork moves linearly towards the parking direction, the conical surface of the conical block outwards extrudes the parking pawl, so that the parking pawl moves towards the parking ratchet wheel;
the parking spring is sleeved on the push rod, the parking shifting fork is sleeved on the push rod in an empty mode, the parking spring is abutted against the conical block and between the parking shifting forks, and the parking spring has initial pretightening force.
Preferably, parking mechanism still includes the guide holder, be equipped with the guiding hole on the terminal surface of guide holder, the parking pawl pastes and leans on the terminal surface, the parking shift fork court during parking direction linear motion, the toper piece stretches into in the guiding hole and outwards crowds the parking pawl.
Preferably, the end face is provided with a step, the step is communicated with the guide hole, and the parking pawl is attached to the step.
Preferably, the parking pawl includes stiff end and expansion end, the stiff end rotates with the pawl pivot to be connected, the toper piece is used in the expansion end, the expansion end be equipped with the pawl arch of parking ratchet's tooth's socket block, the parking subassembly is still including ordering about the parking pawl breaks away from parking ratchet's reset torsion spring.
Preferably, the reverse gear shifting fork is sleeved on the shifting fork shaft in an empty manner, the reverse gear decoupling assembly further comprises a decoupling spring sleeved on the shifting fork shaft, a notch is formed in the reverse gear shifting fork, and the shifting fork shaft is exposed in the notch;
the shifting fork shaft is provided with a first positioning pin and a second positioning pin, the decoupling spring is abutted between the first positioning pin and the reverse gear shifting fork, and the second positioning pin is arranged in the notch and abutted against the reverse gear shifting fork.
Preferably, the reverse decoupling spring has an initial preload, and the initial preload of the reverse decoupling spring is greater than the force required to engage the reverse gear.
Preferably, the motor drive assembly includes a shift motor, a first duplicate gear connected to the shift motor, a shift hub gear provided on the shift hub, and a second duplicate gear coupled between the first duplicate gear and the shift hub gear.
The embodiment of the utility model provides a still provide an automatic gearbox, including foretell automatic gearbox's parking mechanism.
Compared with the prior art: through setting up the motion conversion structure, the rotary motion that will shift the hub converts the straight reciprocating motion of shifting the shifting block into, make when motor drive shifts the hub rotatory, can drive parking shift fork toward parking direction linear motion, realize the parking with the cooperation of parking ratchet wheel in order to promote the parking pawl, a motor drive subassembly simultaneous control is shifted and parking mechanism has been realized, an effectual motor and the motor control unit of having practiced thrift, reduce the gearbox and arrange the space, be favorable to arranging of gearbox, system control and structure complexity are reduced, and cost is reduced.
Drawings
Fig. 1 is a perspective view of a parking mechanism of an automatic transmission according to a first embodiment of the present invention;
fig. 2 is a perspective view of the reverse decoupling assembly in the first embodiment of the present invention;
fig. 3 is a perspective view of a parking assembly according to a first embodiment of the present invention;
fig. 4 is a perspective view of a shift hub in a first embodiment of the present invention;
fig. 5 is a perspective view of the guide holder according to the first embodiment of the present invention.
The following detailed description of the invention will be further described in conjunction with the above-identified drawings.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Several embodiments of the invention are given in the accompanying drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Example one
Referring to fig. 1 to 5, a parking mechanism of an automatic transmission according to a first embodiment of the present invention is shown, including a motor driving assembly 10, a gear shifting hub 20, a gear shifting block 30, a reverse decoupling assembly 40, a parking fork 50, and a parking assembly 60. Wherein,
the motor driving assembly 10 is used for providing a rotational driving force, the gear shifting hub 20 is connected with the motor driving assembly 10 to rotate under the action of the rotational driving force, one end of the gear shifting block 30 is connected with the gear shifting hub 20 through a motion conversion structure 70, the motion conversion structure 70 is used for converting the rotational motion of the gear shifting hub 20 into a linear reciprocating motion of the gear shifting block 30, the reverse decoupling assembly 40 comprises a shift fork shaft 41 and a reverse shift fork 42, the other end of the gear shifting block 30, which is far away from the gear shifting hub 20, is connected with the shift fork shaft 41, the shift fork shaft 41 makes the linear reciprocating motion along with the gear shifting block 30, the two motion directions of the linear reciprocating motion are respectively a parking direction and a reverse direction (as shown in fig. 1), the reverse shift fork 42 is arranged on the shift fork shaft 41 and connected with a gear sleeve (not shown in the figure) of a reverse synchronizer, the reverse shift fork 42 makes the linear reciprocating motion along with the shift fork shaft 41, and when the shift fork 42 makes the linear motion along with the shift shaft 41 towards the reverse direction, shifting gears by pushing a gear sleeve of the reverse gear synchronizer to move so as to engage the reverse gear; the parking shifting fork 50 is connected with the shifting fork shaft 41 and/or the gear shifting block 30, and the parking shifting fork 50 also makes linear reciprocating motion along with the shifting fork shaft 41; the parking assembly 60 comprises a parking pawl 61 and a parking ratchet 62, and the parking fork 50 pushes the parking pawl 61 to be matched with the parking ratchet 62 when moving linearly towards the parking direction along with the fork shaft 41.
Specifically, the motor drive assembly 10 includes a shift motor 11, a first dual gear 12 connected to the shift motor 11, a shift hub gear 13 disposed on the shift hub 20, and a second dual gear 14 coupled between the first dual gear 12 and the shift hub gear 13, wherein the shift hub gear 13 is threadably fixed to the shift hub 20, and a rotational drive force of the shift motor 11 is transmitted to the shift hub gear 13 through the first dual gear 12 and the second dual gear 14 after two-stage speed reduction and torque increase, so as to drive the shift hub gear 13 to rotate, and further drive the shift hub 20 to rotate.
By way of example and not limitation, in some cases of the present embodiment, the motion conversion structure 70 specifically includes a spiral groove 71 and a sliding block 72 which are slidably fitted, the sliding block 72 is specifically a diamond-shaped sliding block, the spiral groove 71 is disposed on an outer side wall of the shift hub 20 and extends along an axial direction of the shift hub 20, the sliding block 72 is disposed on the shift dial 30, and the spiral groove 71 and the sliding block 72 cooperatively constitute a cylindrical cam motion structure, so that when the shift hub 20 rotates, the sliding block 72 is forced to slide along the spiral groove 71, thereby driving the shift dial 30 to reciprocate along an axis of the shift hub 20. In order to guide the linear reciprocating motion of the shift block 30, one end of the shift block 30 is sleeved on the guide shaft 31, the other end of the shift block 30 is sleeved on the shift fork shaft 41, the guide shaft 31 and the shift fork shaft 41 are both arranged in parallel with the axis of the shift hub 20, and the guide shaft 31 can be fixed on a transmission housing (not shown). Wherein, the empty cover means rotatable, slidable cover establishes, lets shift block 30's both ends all can the free rotation and on each axle freely slide along the axis of hub 20 that shifts promptly, avoids slider 72 dead in the card when doing the cylindrical cam motion.
In addition, the reverse shift fork 42 is freely sleeved on the shift shaft 41, and the reverse shift fork 42 extends downwards to form a shift fork part 421, and the free end of the shift fork part 421 is connected with a gear sleeve of the reverse synchronizer. The reverse gear decoupling assembly 40 further comprises a decoupling spring 43 sleeved on the shift fork shaft 41, a notch 422 is formed in the reverse gear shift fork 42, and the shift fork shaft 41 is exposed in the notch 422; the shift fork shaft 41 is provided with a first positioning pin 411 and a second positioning pin 412, the decoupling spring 43 abuts between the first positioning pin 411 and the reverse shift fork 42, and the second positioning pin 412 is arranged in the notch 422 and abuts against the reverse shift fork 42. Specifically, the decoupling spring 43 abuts against the first positioning pin 411 through the first stopper 413, and the reverse shift fork 42 abuts against the second positioning pin 412 through the second stopper 414, so that the abutting contact area is increased. In some cases of the present embodiment, the parking fork 50 is screwed to the shift block 30 and is sleeved on the fork shaft 41, the parking fork 50 and the reverse fork 42 are located at two sides of the shift block 30, the fork shaft 41 is further provided with a third positioning pin 415, under the pushing action of the decoupling spring 43, the parking fork 50 tightly pushes the shift block 30, and the parking fork 50 tightly pushes the third positioning pin 415. In specific implementation, each positioning pin can be fixed by interference insertion with the pin hole at the position of the positioning pin.
Specifically, the parking fork 50 is connected with a push rod 51, the push rod 51 is provided with a conical block 511, and when the parking fork 50 moves linearly in the parking direction, the conical surface of the conical block 511 pushes the parking pawl 61 outwards, so that the parking pawl 61 moves towards the parking ratchet 62. In some cases, the parking assembly 60 further includes a guide seat 63, the guide seat 63 may be fixed to the transmission housing, a guide hole 631 is formed on an end surface 632 of the guide seat 63, the parking pawl 61 abuts against the end surface 632, and when the parking fork 50 moves linearly in the parking direction, the tapered block 511 extends into the guide hole 631 and pushes the parking pawl 61 outwards, and at this time, the parking pawl 61 moves outwards against the end surface of the guide seat 63, so as to guide the parking pawl 61. Specifically, the end surface 632 is provided with a step 633, the step 633 is communicated with the guide hole 631, and the parking pawl 61 abuts against the step 633. In some cases, the parking fork 50 is sleeved on the push rod 51, the parking spring 52 abuts between the parking fork 50 and the tapered block 511, and when the parking fork 50 moves linearly in the parking direction, the parking fork 50 compresses the parking spring 52, so that the parking push rod 51 and the tapered block 511 are pushed to move linearly in the parking direction. The parking fork 50 of the present embodiment acts on the parking spring 52 to avoid rigid connection and reduce mechanical vibration and noise.
Specifically, the parking pawl 61 includes a fixed end 611 and a movable end 612, the fixed end 611 is rotatably connected to a pawl rotating shaft 613, the pawl rotating shaft 613 is fixed to a transmission housing, a tapered block 511 acts on the movable end 612, that is, a tapered surface thereof pushes the movable end 612 outwards, a pawl protrusion 614 engaged with a tooth groove of the parking ratchet wheel 62 is provided on the movable end 612, and when the tapered block 511 pushes the movable end 612 outwards, the pawl protrusion 614 on the movable end 612 is engaged with the tooth groove of the parking ratchet wheel 62, thereby achieving parking. The parking assembly 60 further comprises a reset torsion spring 64 for driving the parking pawl 61 to be disengaged from the parking ratchet wheel 62, when the conical block 511 is reset, the movable end 612 loses thrust, and the reset torsion spring 64 drives the parking pawl 61 to be reset, so that parking is released. Preferably, the edge of the end surface of the conical block 511 facing the guide seat 63 is provided with a chamfer, the edge of the opening of the guide hole 631 and the matching part of the movable end 612 and the conical block 511 are also provided with chamfers, and the chamfers can be specifically fillets, so that the guide hole 631 and the movable end 612 can better avoid the conical block 511 to play a role in guiding and buffering.
With reference to fig. 1, the parking mechanism in the present embodiment operates as follows:
when the gear shifting motor 11 receives a reverse gear signal sent by a gearbox controller (not shown in the figure), the gear shifting motor starts to rotate in the forward direction, so that the gear shifting hub 20 is driven to rotate in the forward direction, and the gear shifting block 30 is driven to move in the reverse gear direction, and at the moment, the reverse gear decoupling assembly 40 moves together with the gear shifting block 30, so that the reverse gear shifting fork 42 pushes a gear sleeve of a reverse gear synchronizer to move, and a reverse gear is engaged;
when receiving a parking signal sent by a gearbox controller, the gear shifting motor 11 starts to rotate reversely, so as to drive the gear shifting hub 20 to rotate reversely, further drive the gear shifting block 30 to move towards a parking direction (namely, move reversely), so as to drive the reverse shift fork 42 to move towards the parking direction, so as to remove the reverse gear, then continuously drive the reverse shift fork 42 to move towards the parking direction, push the reverse shift fork 42 to move towards the parking direction and simultaneously drive the parking shift fork 50 to move towards the parking direction, in the moving process, the parking shift fork 50 can compress the parking spring 52, so as to push the conical block 511 to extend into the guide hole 631 of the guide seat 63, so as to push the movable end 612 of the parking pawl 61 to the parking ratchet wheel 62, so that the pawl bulge 614 of the parking pawl 61 is buckled into the tooth groove of the parking ratchet wheel 62, and the locking parking is realized;
when the gear shifting motor 11 receives a parking releasing signal sent by a gearbox controller, the gear shifting motor starts to rotate in the forward direction, the parking shifting fork 50 is driven to move in the reverse direction, the conical block 511 is reset, the parking pawl 61 does not have external force applied by the conical block 511, and under the action of the reset torsion spring 64, the parking pawl 61 is separated from the parking ratchet 62, and parking is released.
It should be noted that, since the automatic shift whole-vehicle gear is arranged as P-R-N-D, when the vehicle is in N gear after stopping, the R gear is passed when the P gear is engaged. When the vehicle needs to be parked in the P gear after parking, the gear sleeve and the reverse gear combined gear ring of the reverse gear synchronizer are possibly in a gear-to-gear state. Generally, at this time, because the whole vehicle completely stops, the gear sleeve of the reverse synchronizer cannot smoothly rotate and is engaged with the reverse gear, and at this time, the gear sleeve of the reverse synchronizer can reversely limit the reverse shift fork 42 to continuously move towards the reverse gear direction, so that the shift hub 20 cannot continuously rotate, and the whole vehicle cannot smoothly pass through the reverse gear and is engaged with the P gear;
for solving the above-mentioned problem, this embodiment is through setting up reverse decoupling zero subassembly 40 after, shift block 30 when receiving shift hub 20 and rotate and promote reverse shift fork 42 to reverse gear direction when moving, if the tooth cover of reverse synchronous ware and reverse combine the ring gear to be in the state of tooth to the tooth, reverse shift fork 42 will unable continuation to reverse gear direction this moment and move, but shift block 30 of shifting this moment still can drive declutch shift shaft 41 and move to reverse gear direction, thereby compress reverse decoupling zero spring 43, make shift hub 20 still can smoothly rotate the required angle of the engagement reverse gear, make the smooth instruction of accomplishing the engagement reverse gear of gearbox control system, then continue to carry out the operation of engaging P and keeping off.
In addition, it should be further noted that the reverse decoupling spring 43 has an initial preload that is greater than the force required for normal reverse. Meanwhile, the parking spring 52 also has an initial pre-tightening force, that is, the initial installation state of the parking spring 52 is in a stressed pre-tightening state (i.e., a compressed state), and the pre-tightening force needs to ensure that the parking spring does not automatically disengage from the P gear within an allowable slope and an allowable parking critical speed after the vehicle is parked in the P gear, so that the parking reliability is ensured. In addition, the initial pretightening force of the parking spring 52 is transmitted to the gear shifting hub 20 through the parking shift fork 50, the gear shifting block 30 and other parts, the matching structure of the gear shifting hub 20 and the sliding block 72 is locked, and other additional structures are not needed to be added to fix the gear shifting hub 20, the parking shift fork 50, the gear shifting block 30 and the like.
To sum up, the utility model discloses automatic transmission's in the middle of the above-mentioned embodiment parking mechanism has following beneficial effect:
1) through setting up motion conversion structure 70, the rotary motion that will shift hub 20 converts the straight reciprocating motion of shifting block 30 into, make when motor drive shifts hub 20 rotatory, can drive parking shift fork 50 toward parking direction linear motion, realize the parking with the cooperation of promotion parking pawl 61 and parking ratchet 62, a motor drive subassembly 10 simultaneous control is shifted and parking mechanism has been realized, an effectual motor and the motor control unit of having practiced thrift, reduce the gearbox and arrange the space, be favorable to arranging of gearbox, system control and structure complexity are reduced, and the cost is reduced.
2) The risk that the gear P cannot be engaged due to the fact that the gear R shifting fork cannot normally enter the gear under certain specific conditions is avoided by arranging the reverse gear decoupling assembly 40. The reverse gear decoupling assembly 40 is integrated on a shifting fork and a shifting fork shaft 41 and is realized by matching simple standard components such as a spring, a pin, a baffle and the like, so that the reverse gear decoupling assembly is compact in structure, simple to manufacture, low in cost and strong in expansibility;
3) the parking component is transmitted to through the push rod to achieve parking through linear motion generated by the shifting hub pushing shifting fork, parking is achieved through avoiding using motor rotating motion, multi-stage gear engagement is cancelled to transmit parking power, the space of the transmission is further saved, the shifting system and the parking system are effectively combined through the push rod mechanism, the space arrangement is relatively independent, the shifting system and the parking system are convenient to arrange, parts of the shifting system can be repeatedly utilized, the number of the parts is reduced, and development difficulty and transmission cost are reduced.
Example two
The second embodiment of the present invention further provides an automatic transmission, including the first embodiment, of the parking mechanism of the automatic transmission.
To sum up, the utility model discloses automatic gearbox in the middle of the above-mentioned embodiment, through setting up motion conversion structure, the rotary motion who will shift the hub converts the straight reciprocating motion of shifting the shifting block into, make when motor drive shifts the hub rotation, can drive the parking shift fork toward parking direction linear motion, realize the parking with the parking ratchet cooperation in order to promote the parking pawl, a motor drive subassembly simultaneous control shifts and parking mechanism has been realized, an effectual motor and the motor control unit of having practiced thrift, reduce the gearbox and arrange the space, be favorable to arranging of gearbox, reduce system control and structure complexity, and the cost is reduced. The risk that the gear P cannot be engaged due to the fact that the gear R shifting fork cannot normally enter the gear under certain specific conditions is avoided by arranging the reverse gear decoupling assembly. And this decoupling zero subassembly integration that reverses gear is realized through simple standard component cooperation such as spring, round pin and baffle on shift fork and declutch shift shaft, compact structure, and it is simple to make, low cost, expansibility is strong.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A parking mechanism for an automatic transmission, the parking mechanism comprising:
a motor driving assembly providing a rotational driving force;
a shift hub connected to the motor drive assembly to rotate by the rotational drive force;
one end of the gear shifting block is connected with the gear shifting hub through a motion conversion structure, and the motion conversion structure converts the rotary motion of the gear shifting hub into the linear reciprocating motion of the gear shifting block;
the reverse gear decoupling assembly comprises a shifting fork shaft and a reverse gear shifting fork, the other end, far away from the gear shifting hub, of the gear shifting block is connected with the shifting fork shaft, the shifting fork shaft follows the gear shifting block to do linear reciprocating motion, the two motion directions of the linear reciprocating motion are a parking direction and a reverse gear direction respectively, the reverse gear shifting fork is arranged on the shifting fork shaft and connected with a reverse gear synchronizer, and the reverse gear shifting fork pushes the reverse gear synchronizer to move to shift gears when the reverse gear shifting fork follows the shifting fork shaft to do linear motion towards the reverse gear direction;
the parking shifting fork is connected with the shifting fork shaft and/or the shifting block;
the parking assembly comprises a parking pawl and a parking ratchet wheel, the parking shifting fork follows the shifting fork shaft towards when in linear motion in the parking direction, the parking pawl is pushed to move to be matched with the parking ratchet wheel.
2. The parking mechanism of an automatic transmission according to claim 1, wherein the motion conversion structure comprises a sliding fit spiral groove and a sliding block, the spiral groove is arranged on an outer side wall of the shift hub, and the sliding block is arranged on the shift shifting block.
3. The parking mechanism of the automatic transmission according to claim 1, wherein the parking shift fork is connected with a push rod, a conical block is arranged on the push rod, and when the parking shift fork moves linearly in the parking direction, the conical surface of the conical block pushes the parking pawl outwards so that the parking pawl moves towards the parking ratchet wheel;
the parking spring is sleeved on the push rod, the parking shifting fork is sleeved on the push rod in an empty mode, the parking spring is abutted against the conical block and between the parking shifting forks, and the parking spring has initial pretightening force.
4. The parking mechanism of the automatic gearbox is characterized by further comprising a guide seat, a guide hole is formed in one end face of the guide seat, the parking pawl is attached to the end face, and when the parking shifting fork moves linearly towards the parking direction, the conical block extends into the guide hole and pushes the parking pawl outwards.
5. The parking mechanism of an automatic transmission according to claim 4, wherein the end surface is provided with a step communicating with the guide hole, and the parking pawl abuts against the step.
6. The parking mechanism of an automatic transmission according to any one of claims 3 to 5, wherein the parking pawl includes a fixed end and a movable end, the fixed end is rotatably connected to the pawl rotating shaft, the tapered block acts on the movable end, a pawl protrusion engaged with a tooth groove of the parking ratchet wheel is provided on the movable end, and the parking assembly further includes a reset torsion spring for driving the parking pawl to disengage from the parking ratchet wheel.
7. The parking mechanism of an automatic transmission according to claim 1, wherein the reverse shift fork is sleeved on the shift fork shaft in an empty manner, the reverse decoupling assembly further comprises a decoupling spring sleeved on the shift fork shaft, a notch is formed in the reverse shift fork, and the shift fork shaft is exposed in the notch;
the shifting fork shaft is provided with a first positioning pin and a second positioning pin, the decoupling spring is abutted between the first positioning pin and the reverse gear shifting fork, and the second positioning pin is arranged in the notch and abutted against the reverse gear shifting fork.
8. The parking mechanism for an automatic transmission of claim 7, wherein the reverse decoupling spring has an initial preload force, and the initial preload force of the reverse decoupling spring is greater than a force required to engage a reverse gear.
9. The parking mechanism for an automatic transmission of claim 1, wherein the motor drive assembly includes a shift motor, a first duplicate gear coupled to the shift motor, a shift hub gear disposed on the shift hub, and a second duplicate gear coupled between the first duplicate gear and the shift hub gear.
10. An automatic transmission characterized by comprising the parking mechanism of an automatic transmission according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120247859.8U CN214367693U (en) | 2021-01-28 | 2021-01-28 | Automatic gearbox's parking mechanism and automatic gearbox |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120247859.8U CN214367693U (en) | 2021-01-28 | 2021-01-28 | Automatic gearbox's parking mechanism and automatic gearbox |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112780768A (en) * | 2021-01-28 | 2021-05-11 | 麦格纳动力总成(江西)有限公司 | Automatic gearbox's parking mechanism and automatic gearbox |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112780768A (en) * | 2021-01-28 | 2021-05-11 | 麦格纳动力总成(江西)有限公司 | Automatic gearbox's parking mechanism and automatic gearbox |
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