CN212804187U - Automatic transmission gear shifting mechanism - Google Patents
Automatic transmission gear shifting mechanism Download PDFInfo
- Publication number
- CN212804187U CN212804187U CN202021083961.0U CN202021083961U CN212804187U CN 212804187 U CN212804187 U CN 212804187U CN 202021083961 U CN202021083961 U CN 202021083961U CN 212804187 U CN212804187 U CN 212804187U
- Authority
- CN
- China
- Prior art keywords
- gear
- gear shifting
- transmission
- output
- drum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model discloses an automatic transmission gear shifting mechanism, the speed reducing mechanism comprises a transmission shaft, the transmission shaft comprises an input installation part, an eccentric part and a supporting part which are fixed with the output end of a gear shifting motor, the axial lead of the eccentric part is not on the same straight line with the axial leads of the input installation part and the supporting part; the inner gear is used for being fixed with the gearbox body; the outer transmission gear is sleeved on the eccentric part and connected with the eccentric part, is positioned in the inner gear and is meshed with the inner gear, and is driven by the transmission shaft to rotate and form revolution through meshing with the inner gear; the output component is rotatably arranged on the supporting part and is respectively connected with the outer transmission gear and the gear shifting drum, and the axial leads of the output component, the gear shifting drum, the supporting part, the input mounting part and the gear shifting motor are positioned on the same straight line. The utility model discloses can avoid the radial space of derailleur not enough and with the advantage that other spare parts interfere.
Description
Technical Field
The utility model relates to an automobile automatic gearbox field, concretely relates to automatic gearbox gearshift.
Background
Because the space of an automobile power cabin is limited, the internal arrangement of the transmission is always a relatively troublesome problem for automobile engineers, and if a three-level reduction gear or a staggered shaft worm and helical gear pair is adopted for intervention of a gear shifting motor, the occupied space is large, so that the gear shifting motor is easy to interfere with other systems in the transmission.
Referring to fig. 1, currently, a conventional automatic transmission for an automobile generally adopts a mode of combining a parallel shaft type three-stage reduction gear set and a shift drum, and the structure of the automatic transmission is as follows: including gear shifting motor 1, gear shifting motor output shaft gear 2, one-level main reduction gear 3, one-level main reduction pinion 4, one-level main reduction gear shaft 5, second grade main reduction gear 6, second grade main reduction pinion 7, second grade main reduction gear shaft 8, shift drum reduction gear 9, shift drum axle 10, shift drum 11, gear shifting motor 1 passes through one-level main reduction gear 3, one-level main reduction pinion 4, second grade main reduction gear 6, second grade main reduction pinion 7, shift drum reduction gear 9, transmit the moment of torsion to shift drum on.
When the arrangement structure is applied to a hybrid power transmission, a problem generally exists that when the overall gear shifting mechanism of the hybrid power transmission is arranged, due to the fact that the motors of EM1 and EM2 are contained in the radial direction, the space for gear shifting arrangement is limited, and the arrangement mode of combining the transverse reduction mechanism and the gear shifting drum not only has a large number of gear shifting mechanisms, but also is large and complex in structure and easy to interfere with other parts. Due to the large radial size of the double motors, the arrangement of the gear shifting system cannot be completed in a limited space according to the traditional arrangement method.
Disclosure of Invention
The utility model provides an automatic transmission gearshift that can solve the radial space of derailleur not enough and avoid interfering the problem with other spare parts.
Automatic derailleur gearshift, including gear shifting motor, reduction gears, shift drum, gear shifting motor's output shaft is connected with reduction gears's input, and reduction gears's output and shift drum are connected, reduction gears includes:
the transmission shaft comprises an input mounting part, an eccentric part and a supporting part which are fixed with the output end of the gear shifting motor, and the axis of the eccentric part is not on the same straight line with the axis of the input mounting part and the axis of the supporting part;
the inner gear is used for being fixed with the gearbox body;
the outer transmission gear is sleeved on the eccentric part and connected with the eccentric part, is positioned in the inner gear and is meshed with the inner gear, and is driven by the transmission shaft to rotate and form revolution through meshing with the inner gear;
the output component is rotatably arranged on the supporting part and is respectively connected with the outer transmission gear and the gear shifting drum, and the axial leads of the output component, the gear shifting drum, the supporting part, the input mounting part and the gear shifting motor are positioned on the same straight line.
Furthermore, the teeth of a cogwheel on internal gear and the outer drive gear are involute profile of tooth, and the difference of the teeth of a cogwheel number on internal gear and the outer drive gear is 2 to 6.
Further, the output member includes a disc member rotatably mounted on the support portion and an output shaft connected to one end of the disc member, the disc member being connected to the outer transmission gear, the output shaft being connected to the shift drum.
Furthermore, a plurality of pin holes are formed in the disc-shaped part, a plurality of pin shafts are arranged on the axial end face of the outer transmission gear, and the pin shafts are inserted into the pin holes.
The utility model discloses the basic thought of the type of solving above-mentioned technical problem does: in the arrangement process of the gear shifting mechanism of the automatic transmission, the radial space is limited, the axial space is abundant, the traditional parallel shaft type three-stage reduction gear set is changed into a reduction mechanism consisting of a transmission shaft, an inner gear, an outer transmission gear and an output part, the reduction mechanism is coaxial to transmit torque, the radial space can be effectively saved, the axial space is fully utilized, and the problem that the gear shifting mechanism of the automatic transmission is difficult to arrange is solved.
If the gear shifting motor is arranged beside the three-stage gear set according to the traditional parallel shaft type gear shifting arrangement mode, the radial distance between the gear shifting motor and the gear shifting drum is too long, and if the gear shifting motor is arranged below the transmission, the problem of insufficient ground clearance is necessarily caused. Obviously, the utility model discloses a gear shifting motor and shift drum are connected to the reducing mechanism of coaxial-type, have not only solved the not enough problem in space, and have reduced the part and have reduced the derailleur cost.
The automatic transmission gearshift that this patent designed compares with traditional automatic transmission gearshift and has following advantage:
1. can realize larger transmission ratio, and the single-stage transmission ratio is more than 10-200.
2. The coaxial transmission of the input and the output of the torque and the rotating speed can be realized.
3. The axial length is short, the occupied space is small, the weight is light, and when the transmission ratio is equal, the volume and the weight can be reduced by 1/3-2/3 compared with the common cylindrical gear with the same power.
4. The processing is convenient, and the manufacturing cost is lower. The involute tooth profiles in the inner gear 6 and the outer transmission gear 8 can be processed by using a common involute gear cutter and a gear machine tool, special cutters and special equipment are not needed, and common gear materials can be adopted as materials.
5. The efficiency is high. At ratios of 10-200, efficiencies range from 80% to 94%, with efficiency decreasing with increasing ratio.
6. Stable operation, low noise and high bearing capacity. The contact area is large, the contact strength of the gear is greatly improved, and the bending strength of the gear is also improved due to the adoption of a short tooth system. The operation is stable and the noise is low. And under the condition of the same modulus, the transmission torque is larger than that of the common cylindrical gear.
Drawings
FIG. 1 is a schematic structural view of a shift mechanism of an automatic transmission according to a prior art arrangement;
FIG. 2 is a cross-sectional view of an automatic transmission shift mechanism of the type of the present invention;
fig. 3 is a side view of the speed reducing mechanism.
Reference numbers in the drawings:
the gear shifting device comprises a gear shifting motor 1, a gear shifting drum 2, an input mounting portion 3, an eccentric portion 4, a supporting portion 5, an internal gear 6, a bearing 7, an outer transmission gear 8, a pin shaft 8a, a disc-shaped component 9, a pin hole 9a and an output shaft 10.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 2 and 3, the automatic transmission gear shift mechanism includes a gear shift motor 1, a speed reduction mechanism, and a gear shift drum 2, wherein an output shaft of the gear shift motor 1 is connected to an input end of the speed reduction mechanism, an output end of the speed reduction mechanism is connected to the gear shift drum 2, and the speed reduction mechanism includes:
referring to fig. 2 and 3, the transmission shaft includes an input mounting portion 3 fixed to an output end of the shift motor 1, an eccentric portion 4, and a support portion 5, an inner gear 6 fixed to a transmission case, an outer transmission gear 8, and an output member, and an axial line of the eccentric portion 4 is not collinear with axial lines of the input mounting portion 3 and the support portion 5. The eccentric portion 4 has an outer diameter smaller than that of the input mounting portion 3, a first shoulder is formed between the eccentric portion 4 and the input mounting portion 3, the eccentric portion 4 has an outer diameter larger than that of the support portion 5, and a second shoulder is formed between the eccentric portion 4 and the support portion 5.
As shown in fig. 2 and 3, the internal gear 6 is fixed to the transmission case by bolts, so that the internal gear 6 does not rotate or move axially during operation. The inner diameter of the inner gear 6 is larger than the outer diameter of the outer drive gear 8 so that the inner gear 6 can accommodate the outer drive gear 8 inside thereof.
As shown in fig. 2 and 3, the outer transmission gear 8 is sleeved on the eccentric portion 4 and connected with the eccentric portion 4, and one end of the outer transmission gear 8 is axially limited by the first shoulder. A first retainer ring (not shown in the figure) is arranged on the eccentric part 4, and the other end of the outer transmission gear 8 is axially limited by the first retainer ring. The outer transmission gear 8 is located in the inner gear 6 and meshed with the inner gear 6, the outer transmission gear 8 rotates under the driving of the transmission shaft, meanwhile, the outer transmission gear 8 revolves through meshing with the inner gear 6, the difference of the tooth numbers of the gear teeth on the inner gear 6 and the outer transmission gear 8 is 2-6, and the outer transmission gear 8 is decelerated under the condition of the difference of the tooth numbers. Preferably, the teeth on the inner gear 6 and the outer drive gear 8 are both involute profiles.
As shown in fig. 2 and 3, the output member is rotatably mounted on the support portion 5, the output member is connected to the outer transmission gear 8 and the shift drum 2, and the shift motor 1 and the shift drum 2 transmit power through the reduction gear, but the axial lines of the output member, the shift drum 2, the support portion 5, the input mounting portion 3, and the shift motor 1 are positioned on the same straight line, so that the motor torque is coaxially transmitted, thereby realizing the shift and parking operation.
As shown in fig. 2 and 3, the output member includes a disc member 9 and an output shaft 10 connected to one end of the disc member 9, the disc member 9 is rotatably mounted on the support portion 5, and the disc member 9 is mounted on the support portion 5 through a bearing 7, so that the disc member 9 can freely rotate relative to the support portion 5. The disc element 9 is connected to the outer drive gear 8 and the output shaft 10 is connected to the shift drum 2. Preferably, the disc member 9 is provided with a plurality of pin holes 9a, and the outer drive gear 8 is provided with a plurality of pin shafts 8a on an axial end surface thereof, the pin shafts 8a being inserted into the pin holes 9 a. Preferably, the axes of the pin holes 9a are located on the same circumference, the axes of the pin shafts 8a are located on the same circumference, and the pin shafts 8a are in clearance fit with the pin holes 9 a. The distance between the axial lead of the eccentric part 4 and the axial lead of the input mounting part 3 is the eccentricity of the eccentric part 4, and the diameter of the pin hole 9a on the disc-shaped part 9 is two times larger than the outer diameter of the pin shaft 8 a.
As shown in fig. 2 and fig. 3, when the gear shift motor 4 drives the transmission shaft to rotate, and the eccentric shaft of the input mounting part rotates, the inner gear 6 and the gearbox body are fixed, so that the outer transmission gear 8 is forced to do planetary motion (both revolution and rotation) around the inner gear 6; and because the difference of the tooth number of the outer transmission gear 8 and the tooth number of the inner gear 6 is small, the motion of the outer transmission gear 8 around the center of the eccentric part 4 is reverse low-speed self-rotation motion. The rotation motion of the eccentric part 8 is transmitted to the output shaft 10 by the output component, thereby achieving the purpose of speed reduction. The diameter of the pin hole 9a on the disc-shaped part 9 is two times larger than the outer diameter of the pin shaft 8 a. During the movement, the pin shaft 8a is always in contact with the wall of the pin hole 9a on the disc-shaped component 9, so that the self-rotation movement of the outer transmission gear is transmitted to the output shaft 10 through the pin shaft 8a to realize the speed reduction movement opposite to the direction of the input mounting part 3.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (4)
1. Automatic derailleur gearshift, including gear shifting motor (1), reduction gears, shift drum (2), the output shaft of gear shifting motor (1) is connected with reduction gears's input, and reduction gears's output is connected with shift drum (2), its characterized in that, reduction gears includes:
the transmission shaft comprises an input mounting part (3) fixed with the output end of the gear shifting motor (1), an eccentric part (4) and a supporting part (5), and the axis of the eccentric part (4) is not on the same straight line with the axis of the input mounting part (3) and the axis of the supporting part (5);
an internal gear (6) fixed with the gearbox body;
the outer transmission gear (8) is sleeved on the eccentric part (4) and connected with the eccentric part (4), the outer transmission gear (8) is positioned in the inner gear (6) and meshed with the inner gear (6), the outer transmission gear (8) is driven by the transmission shaft to rotate, and meanwhile, the outer transmission gear (8) is meshed with the inner gear (6) to form revolution;
the output component is rotatably arranged on the supporting portion (5), the output component is respectively connected with the outer transmission gear (8) and the gear shifting drum (2), and the axial leads of the output component, the gear shifting drum (2), the supporting portion (5), the input mounting portion (3) and the gear shifting motor (1) are located on the same straight line.
2. The automatic transmission gear shift mechanism according to claim 1, wherein the teeth on the internal gear (6) and the external drive gear (8) are both involute tooth profiles, and the difference between the number of teeth on the internal gear (6) and the external drive gear (8) is 2 to 6.
3. The automatic transmission shift mechanism according to claim 1, characterized in that the output member includes a disc member (9) and an output shaft (10) connected to one end of the disc member (9), the disc member (9) being rotatably mounted on the support portion (5), the disc member (9) being connected to the outer drive gear (8), the output shaft (10) being connected to the shift drum (2).
4. The automatic transmission shift mechanism according to claim 3, wherein a plurality of pin holes (9 a) are provided in the disc member (9), and a plurality of pin shafts (8 a) are provided on an axial end surface of the outer drive gear (8), the pin shafts (8 a) being inserted into the pin holes (9 a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021083961.0U CN212804187U (en) | 2020-06-12 | 2020-06-12 | Automatic transmission gear shifting mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021083961.0U CN212804187U (en) | 2020-06-12 | 2020-06-12 | Automatic transmission gear shifting mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212804187U true CN212804187U (en) | 2021-03-26 |
Family
ID=75096313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021083961.0U Active CN212804187U (en) | 2020-06-12 | 2020-06-12 | Automatic transmission gear shifting mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212804187U (en) |
-
2020
- 2020-06-12 CN CN202021083961.0U patent/CN212804187U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8562476B2 (en) | Manual transmission using chain and planetary gear set as final drive | |
| CN114321292B (en) | Speed reducer with high stability | |
| US4909100A (en) | Differential gear device incorporating internal meshing type planetary reduction gear | |
| CN114857230A (en) | 5-15 drive ratio push type CVT mechanical stepless speed changer for electric automobile | |
| KR101033858B1 (en) | Gear set for continuously variable transmission | |
| CN213839427U (en) | Double-intermediate-shaft speed reducer | |
| CN212804187U (en) | Automatic transmission gear shifting mechanism | |
| CN109723767B (en) | Vehicle speed reducer with power split output and differential function | |
| CN201386759Y (en) | Gearbox | |
| CN209925523U (en) | Planetary cycloidal speed reducer for light robot | |
| CN209516825U (en) | Decelerating motor in a kind of electric car wheel | |
| CN207989697U (en) | A kind of electric powered motor output speed reducer structure | |
| CN208698503U (en) | A kind of pure electric automobile and its power assembly system | |
| CN217683073U (en) | Speed reduction device, robot joint and robot | |
| CN111439117A (en) | Coaxial two-gear planetary row electric drive axle for automobile | |
| CN214838183U (en) | AGV commodity circulation is planetary reducer for unmanned vehicle | |
| CN218817899U (en) | Hollow sealed cycloidal speed reducer for heavy industrial equipment | |
| KR101654501B1 (en) | Planetary reduction gear | |
| CN218625302U (en) | Hollow sealed cycloidal speed reducer for light intelligent equipment | |
| CN213685145U (en) | Speed reducer with single-shaft input and multi-shaft output | |
| CN219413461U (en) | High-narrow planetary reducer | |
| CN211875059U (en) | Adjustable hollow rotary actuator | |
| CN217074010U (en) | Electric drive axle assembly and vehicle | |
| CN217002989U (en) | Double-acting gear ring stage inner speed change planetary reducer | |
| CN213176677U (en) | Coaxial two-stage planetary reducer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |