CN210859779U - Electric gear selecting and shifting mechanism of automatic gearbox - Google Patents
Electric gear selecting and shifting mechanism of automatic gearbox Download PDFInfo
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- CN210859779U CN210859779U CN201920661915.5U CN201920661915U CN210859779U CN 210859779 U CN210859779 U CN 210859779U CN 201920661915 U CN201920661915 U CN 201920661915U CN 210859779 U CN210859779 U CN 210859779U
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Abstract
The utility model discloses an electric gear selecting and shifting mechanism of an automatic gearbox, which comprises a gear shifting and selecting motor, a turbine, a gear shifting hub, a worm and a pair of synchronizer gear sleeves; the gear shifting and selecting motor drives the worm to drive the worm wheel to rotate, and the worm wheel is connected with the gear shifting hub to drive the gear shifting hub to rotate; a pair of shifting fork shafts are arranged in parallel with the axial direction of the shifting hub, and a pair of synchronizer gear sleeves are respectively fixedly connected with the shifting forks and movably sleeved on the shifting fork shafts through the pair of shifting forks; the shift fork extends towards the shift hub to form a guide post, and the guide post is slidably embedded in a corresponding shift selecting guide groove formed on the surface of the shift hub, so that the shift fork can be pushed to reciprocate along the shift shaft when the shift hub rotates. The electric gear selecting and shifting mechanism of the automatic gearbox is simple in structure and low in requirement on cleanliness; meanwhile, the energy consumption of the whole operation is reduced, and the maintenance cost is greatly reduced.
Description
Technical Field
The utility model relates to an automatic transmission technical field specifically relates to an automatic transmission electronic selection gearshift.
Background
With the rapid popularization of vehicles in China, the requirement of users on the operation comfort of the vehicles is higher and higher, and the market share of the vehicles equipped with the automatic gearbox is larger and larger. The mainstream automatic gearbox system in the market AT present mainly comprises an Automatic Mechanical Transmission (AMT), a Continuously Variable Transmission (CVT), a torque converter planetary gear structure automatic gearbox (AT) and a double-clutch automatic gearbox (DCT). The common characteristic of the automatic gearboxes is that the control unit controls the gear selecting and shifting mechanism to automatically shift gears without driver intervention, so that the operation intensity of a driver is reduced.
CVTs and ATs typically employ torque converters coupled to the engine without a clutch system; whereas AMT and DCT both use conventional clutch friction systems to couple to the engine. The CVT controls the pressure plate to move through a hydraulic system, so that the speed ratio is changed; the AT adopts a hydraulic system to realize the selection of gears by a wet friction system of each gear; the AMT and the DCT are similar in structure, except that the clutch needs to be operated, gear selection is realized through a gear selection and shifting mechanism. Therefore, AMT and DCT automatic transmissions require automation of clutches and gear selection and shift, and automatic selection of speed ratio is realized by a control unit.
However, the automatic gear selecting and shifting mechanisms of the AMT and the DCT are mainly realized by adopting hydraulic solenoid valve system control and electro-hydraulic control at present. It mainly has the following disadvantages: 1. the hydraulic control system needs an oil pump to maintain the system oil pressure at a specific level, so that the oil pump can keep running to compensate the leakage of the system even under the condition of no gear shifting requirement, so that the system oil pressure is maintained at the specific level, and the energy consumption is high; 2. the hydraulic control system has a complex structure, is difficult to design, has high requirements on the cleanliness of hydraulic oil, has high requirements on assembly environment, needs dustless space and has high cost; 3. the electro-hydraulic control system avoids a complex structure of a hydraulic control valve in design, reduces the requirement on the cleanliness of the hydraulic system, but needs a sealing element to prevent leakage, and is high in maintenance cost.
Therefore, it is urgently needed to provide a new electric gear selecting and shifting mechanism of an automatic gearbox to solve the technical problem.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an automatic gearbox electric gear selecting and shifting mechanism which has simple structure and low requirement on cleanliness; meanwhile, the energy consumption of the whole operation is reduced, and the maintenance cost is greatly reduced.
In order to achieve the purpose, the utility model provides an automatic gearbox electric gear selecting and shifting mechanism, which comprises a gear shifting and selecting motor, a turbine, a gear shifting hub, a worm and a pair of synchronizer gear sleeves; wherein the content of the first and second substances,
the gear shifting and selecting motor drives the worm to drive the worm wheel to rotate, and the worm wheel is connected with the gear shifting hub to drive the gear shifting hub to rotate;
a pair of shifting fork shafts are arranged in parallel with the axial direction of the shifting hub, and a pair of synchronizer gear sleeves are respectively fixedly connected with the shifting forks and movably sleeved on the shifting fork shafts through the pair of shifting forks;
the shift fork extends towards the shift hub to form a guide post, and the guide post is slidably embedded in a corresponding shift selecting guide groove formed on the surface of the shift hub, so that the shift fork can be pushed to reciprocate along the shift shaft when the shift hub rotates.
Preferably, the connection between the turbine and the shift hub is a hard connection.
Preferably, the worm wheel and/or the worm screw have a self-locking function.
Preferably, the junction of the shift fork and the synchronizer gear sleeve forms an arc-shaped piece.
Preferably, the arc angle of the arc is greater than 180 °.
Preferably, the shift fork is of an integrally formed structure.
According to the technical scheme, the utility model discloses by the motor drive worm, drive the turbine and rotate, the turbine with shift the hub hard joint, shift the hub and rotate, the guide way on the hub of shifting promotes the shift fork of shifting along axial back and forth movement according to predesigned angle and axial displacement to realize the axial motion of synchronous ware, reach the purpose of selecting the gear of shifting. The guide groove on the gear shifting hub is designed according to a specific angle, and the control of the axial positions of a plurality of gear shifting forks can be realized, and the mode is widely applied to motorcycles. Meanwhile, the worm gear can realize a large transmission ratio, so that the requirement of driving a small-size motor is met; the worm and gear has a self-locking function, so that gear disengagement can be prevented; in addition, the design of the guide groove of the gear shifting hub enables the guide groove to limit the axial movement of the shifting fork even if the gear shifting hub rotates at a small angle, and therefore gear disengagement is prevented.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of an electric gear selecting and shifting mechanism of an automatic transmission according to an embodiment of the present invention;
fig. 2 is a side view of an electric gearshift mechanism of an automatic transmission according to an embodiment of the present invention.
Description of the reference numerals
1-turbine 2-worm
3-gear shifting fork 4-synchronizer gear sleeve
5-gear shifting hub 6-gear shifting guide groove
7-shift fork shaft 8-gear shifting motor
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.
In the present invention, unless otherwise specified, the directional terms included in the terms "upper" and "lower" and the like merely represent the directions of the terms in a conventional use state or are colloquially known by those skilled in the art, and should not be construed as limiting the terms.
Referring to fig. 1 and 2, the utility model provides an electric gear selecting and shifting mechanism of an automatic transmission, which comprises a gear shifting and selecting motor 8, a turbine 1, a gear shifting hub 5, a worm 2 and a pair of synchronizer gear sleeves 4; wherein the content of the first and second substances,
the gear shifting and selecting motor 8 drives the worm 2 to drive the turbine 1 to rotate, and the turbine 1 is connected with the gear shifting hub 5 to drive the gear shifting hub 5 to rotate;
a pair of shifting fork shafts 7 are arranged in parallel with the axial direction of the shifting hub 5, and a pair of synchronizer gear sleeves 4 are respectively fixedly connected with the shifting forks 3 and movably sleeved on the shifting fork shafts 7 through the pair of shifting forks 3;
the shift fork 3 extends towards the shift hub 5 to form a guide post, and the guide post is slidably embedded in a correspondingly formed shift guide groove 6 on the surface of the shift hub 5, so that the shift fork 3 can be pushed to reciprocate along the fork shaft 7 when the shift hub 5 rotates.
The connection between the worm wheel 1 and the gear shifting hub 5 is a hard connection, and the worm wheel 1 and/or the worm 2 have a self-locking function.
The junction of the shifting fork 3 and the synchronizer gear sleeve 4 forms an arc-shaped part, the arc angle of the arc-shaped part is larger than 180 degrees, and the shifting fork 3 is of an integrated structure.
Through above-mentioned technical scheme, by motor drive worm 2, drive turbine 1 and shift hub 5 rigid coupling, shift hub 5 and rotate, the guide way on the hub 5 of shifting promotes the shift fork of shifting and follows axial back and forth movement according to predesigned angle and axial displacement to realize the axial motion of synchronous ware, reach the purpose of selecting to shift. The guide groove on the gear shifting hub 5 is designed according to a specific angle, and the control of the axial positions of a plurality of gear shifting forks can be realized, and the mode is widely applied to motorcycles. Meanwhile, the worm wheel 1 and the worm 2 can realize a large transmission ratio in transmission, so that the requirement of driving a small-size motor is met; the worm 2 of the worm wheel 1 has a self-locking function, so that gear disengagement can be prevented; in addition, the design of the guide groove of the shift hub 5 allows the guide groove to restrict the axial movement of the shift fork even when the shift hub 5 rotates at a small angle, thereby preventing gear hopout.
The motor is adopted for driving, the control is convenient and flexible, the response speed is high, the control precision is high, and the motor can be directly driven by a gearbox control unit; the control unit drives the motor only when gear shifting is needed, and the motor does not need to work when gear shifting is not needed, so that the energy consumption of the system is greatly reduced; and the whole structure adopts a full mechanical structure, no hydraulic system is adopted, the requirement on the use cleanliness is low, the processing is convenient, and the cost is low.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the details of the above embodiments, and the technical concept of the present invention can be within the scope of the present invention to perform various simple modifications to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and in order to avoid unnecessary repetition, the present invention does not need to describe any combination of the features.
In addition, various embodiments of the present invention can be combined arbitrarily, and the disclosed content should be regarded as the present invention as long as it does not violate the idea of the present invention.
Claims (6)
1. An electric gear selecting and shifting mechanism of an automatic gearbox is characterized by comprising a gear shifting and selecting motor (8), a turbine (1), a gear shifting hub (5), a worm (2) and a pair of synchronizer gear sleeves (4); wherein the content of the first and second substances,
the gear shifting and selecting motor (8) drives the worm (2) to drive the turbine (1) to rotate, and the turbine (1) is connected with the gear shifting hub (5) to drive the gear shifting hub (5) to rotate;
a pair of shifting fork shafts (7) is arranged in parallel with the axial direction of the gear shifting hub (5), and a pair of synchronizer gear sleeves (4) are fixedly connected with the gear shifting forks (3) respectively and movably sleeved on the shifting fork shafts (7) through the pair of gear shifting forks (3);
the gear shifting fork (3) extends towards the gear shifting hub (5) to form a guide post, and the guide post is slidably embedded in a gear shifting guide groove (6) correspondingly formed on the surface of the gear shifting hub (5), so that the gear shifting fork (3) can be pushed to reciprocate along the fork shaft (7) when the gear shifting hub (5) rotates.
2. The automatic transmission electric gearshift mechanism according to claim 1, characterized in that the connection between the worm gear (1) and the shift hub (5) is a hard connection.
3. The automatic gearbox electric gear selection and shift mechanism according to claim 1, characterized in that the worm wheel (1) and/or the worm (2) have a self-locking function.
4. The automatic gearbox electric gear selection and shift mechanism according to claim 1, characterized in that the junction of the shift fork (3) and the synchronizer sleeve (4) forms an arc-shaped piece.
5. The automatic transmission electric selector mechanism of claim 4 wherein the arc angle of the arcuate member is greater than 180 °.
6. The automatic gearbox electric gear selecting and shifting mechanism according to claim 1, characterized in that the gear shifting fork (3) is of an integrated structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920661915.5U CN210859779U (en) | 2019-05-09 | 2019-05-09 | Electric gear selecting and shifting mechanism of automatic gearbox |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920661915.5U CN210859779U (en) | 2019-05-09 | 2019-05-09 | Electric gear selecting and shifting mechanism of automatic gearbox |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210859779U true CN210859779U (en) | 2020-06-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920661915.5U Active CN210859779U (en) | 2019-05-09 | 2019-05-09 | Electric gear selecting and shifting mechanism of automatic gearbox |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210859779U (en) |
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2019
- 2019-05-09 CN CN201920661915.5U patent/CN210859779U/en active Active
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