CN213145268U - Two-gear transmission mechanism - Google Patents
Two-gear transmission mechanism Download PDFInfo
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- CN213145268U CN213145268U CN202021432631.8U CN202021432631U CN213145268U CN 213145268 U CN213145268 U CN 213145268U CN 202021432631 U CN202021432631 U CN 202021432631U CN 213145268 U CN213145268 U CN 213145268U
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Abstract
The utility model discloses a two-gear transmission mechanism, which comprises a motor, a speed change structure and a differential mechanism; the motor and the speed changer form a whole, and the speed changing part adopts a planetary wheel structure with double planetary rows; the gear shifting part adopts a coaxial and back-to-back double-brake structure, is symmetrical left and right, and realizes gear switching through the alternate operation of a left brake and a right brake; the complexity of the shell is effectively reduced, and the structure is more compact. The utility model adopts a conical surface braking structure, the contact area is large, the braking torque is high, and the braking effect is good; the two conical surfaces are concentric, so that the braking accuracy is ensured, no deviation exists, and the slight sliding phenomenon of a common braking mechanism is avoided.
Description
Technical Field
The utility model belongs to the technical field of the derailleur, in particular to two grades of formula derailleur mechanisms.
Background
The transmission is used as a main component of a transmission system and is used for improving the dynamic property and the economical efficiency of the automobile. For a traditional automobile, in order to meet the use requirement of the automobile, a multi-gear transmission is required; for an electric automobile, a multi-gear transmission is not needed, and a transmission capable of meeting the requirements of high-speed running and climbing of the electric automobile is needed. The existing electric automobile transmission has two-gear manual transmission and two-gear automatic transmission.
For a two-gear manual transmission, the two-gear manual transmission has the advantages of simple structure, reliable performance, low manufacturing and maintenance cost and high transmission efficiency, but a manually operated clutch or synchronizer needs to be added at the input end, the structure is complicated, and the cost is increased. The two-gear automatic transmission is verified in the market, the technology is mature and reliable, the transmission efficiency is high, and the cost is low; but the gear shifting process lacks flexibility, the power output is not smooth enough, and the pause feeling is slightly strong. The utility model relates to a shift structure of unpowered interrupt can satisfy electric automobile's travelling comfort and dynamic demand.
Disclosure of Invention
The utility model aims at providing a two grades of formula derailleur structures to improve the precision of shifting, strengthen the braking effect, make the structure simpler, compact.
The utility model discloses a realize above purpose and adopt following technical scheme:
the utility model discloses two-gear transmission structure, by brake module, speed change module and shift module and constitute, including motor, input shaft, brake motor, lead screw, lower conical surface brake block, upper conical surface brake block, lower gear, internal gear, planet carrier, right side planet wheel, left side planet wheel, centre wheel, left brake axle, right brake, left brake, sun gear, little planet wheel, differential mechanism, upper gear, casing; the brake module consists of a brake motor, a screw rod, a lower conical surface brake block and an upper conical surface brake block; the conical surface brake block is connected with the upper conical surface brake block in a centering way; the screw rod and the lower conical surface brake block form a screw pair, and the brake motor is fixed on the shell; the speed changing module consists of the input shaft, the lower gear, the inner gear, the sun gear, the planet carrier, the right planet gear, the left planet gear, the central gear and the small planet gear; wherein the input shaft and the central wheel form a rotating pair; the central wheel and the small planetary wheel form a gear pair; the small planet wheel and the planet carrier form a revolute pair; the small planet wheel and the right planet wheel form a gear pair; the right planet wheel is coaxially connected with the left planet wheel; the left planet wheel and the sun wheel form a gear pair; the gear shifting module consists of a left brake shaft, a right brake and a left brake; the inner ring of the right brake is fixedly connected with the sun gear through the left brake shaft; the outer ring of the right brake is fixedly connected with the shell; the inner ring of the left brake is fixedly connected with the planet carrier, and the outer ring of the left brake is fixedly connected with the shell.
Compared with the prior art, the beneficial effects of the utility model are embodied in:
1. the utility model adopts a double-brake and double-planet row structure to realize 2-gear speed change; the structure is compact; the electric automobile gear shifting device can realize unpowered interrupted gear shifting, has small gear shifting smooth impact, can meet the driving power requirement of the electric automobile, can greatly improve the running efficiency of the motor, and improves the economy of the automobile.
2. The braking module of the utility model has large conical surface contact area of the two conical surface structures, large braking force and good braking effect; the two conical surfaces are concentric, the precision is high, no deviation exists, and the slight sliding phenomenon of a common locking mechanism is avoided; the braking module adopts conical surface type automatic compensation, and the stroke of the outer conical surface can be increased after the braking module is worn, so that the purpose of stability is achieved.
3. The lead screw has the auto-lock, can realize the auto-lock of outage, avoids taking place dangerous accidents such as swift current car.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Reference numbers in the figures: 1, a motor; 2, an input shaft; 3, braking the motor; 4, a screw rod; 5, a lower conical surface brake block; 6, an upper conical surface brake block; 7, a lower gear; 8 an internal gear; 9 a planet carrier; 10 right planetary gear; 11 a left planetary gear; 12 a center wheel; 13 a left brake shaft; 14 a right brake; 15 left brake; 16 sun gear; 17 small planet wheels; 18 a differential mechanism; 19 an upper gear; 20 shell.
Detailed Description
Referring to fig. 1, the utility model relates to a two grades of formula derailleurs, its characterized in that mainly comprises motor 1, input shaft 2, brake motor 3, lead screw 4, lower conical surface brake block 5, upper conical surface brake block 6, gear train structure, right brake 14, left brake 15, differential mechanism structure 18, casing 20, the gear train structure is the double planet row ravigneaux planetary gear structure.
The motor 1 is connected with an input shaft 2 through a key, the motor 1 is arranged outside a shell 20, a brake motor 3 is fixed on the shell 20 through a screw, the input shaft 2 is fixedly connected with a central wheel 12, the central wheel 12 is externally meshed with a small planetary wheel 17, the small planetary wheel 17 is connected with a planetary carrier 9 through a bearing, the small planetary wheel 17 is externally meshed with a right planetary wheel 10, the right planetary wheel 10 is coaxially connected with a left planetary wheel 11 and rotates uniformly, the right planetary wheel 10 and the left planetary wheel 11 are connected with the planetary carrier 9 through a bearing, the left planetary wheel 11 is externally meshed with a sun wheel 16, a left brake shaft 13 is fixedly connected with the sun wheel 16, an internal gear 8 is internally meshed with the right planetary wheel 10, the internal gear 8 is fixedly connected with a lower gear 7 through a shaft and rotates in the same direction, the lower gear 7 is externally meshed with an upper gear 19, and the upper gear; the lower conical surface brake block 5 is connected with the upper conical surface brake block 6 in a centering way; the screw rod 4 and the lower conical surface brake block 5 form a screw pair, and the brake motor 3 is fixed on the shell 20.
The working principle of the utility model is as follows:
the number of teeth of the present design gears is shown in Table 1 according to the speed requirement
TABLE 1 Gear teeth number table
The actuators for the respective gears are shown in Table 2
TABLE 2 Shift actuator worksheet
Note: in the table, "●" indicates binding and ". smallcircle" indicates separation;
with reference to fig. 1 and table 2, the transmission routes of the gears are explained as follows:
1. advance gear (D position)
(1) Advancing first gear (D1 gear)
The motor 1 rotates forwards, the left brake 15 is separated, the right brake 14 is electrically connected, the gear system is a fixed-axis gear system, the planet carrier 9 is kept fixed, the small planet wheel 17, the left planet wheel 11 and the right planet wheel 10 rotate around the planet carrier 9 and revolve around the input shaft 2, the left brake shaft 13 drives the sun wheel 16 to rotate in the same direction, the motor 1 transmits power to the input shaft 2 to drive the input shaft 2 to rotate, the input shaft 2 drives the central wheel 12 to rotate, the central wheel 12 transmits power to the small planet wheel 17 meshed with the central wheel 12, the small planet wheel 17 is meshed with the right planet wheel 10, the fixed-axis gear system is formed because the right brake 14 is in a braking state, the right planet wheel 10 rotates around the planet carrier 9 and revolves around the input shaft 2, the right planet wheel 10 is meshed with the internal gear 8 to transmit power to the internal gear 8, the internal gear 8 drives the lower gear 7 to rotate, the lower gear 7 is meshed with the upper, the power is transmitted to the outside via the differential mechanism 18.
(2) Second forward (D2 gear)
The motor 1 rotates forwards, the left brake is electrified 15 to be combined, the right brake 14 is separated, a gear system is a differential gear system, a left brake shaft 13 is kept fixed, a small planetary wheel 17, a left planetary wheel 11 and a right planetary wheel 10 are transmitted around a planetary carrier 9, the motor 1 transmits power to an input shaft 2 to drive the input shaft 2 to rotate, the input shaft 2 drives a central wheel 12 to rotate, the central wheel 12 transmits the power to the small planetary wheel 17 meshed with the central wheel, the small planetary wheel 17 is meshed with the right planetary wheel 10, the differential gear system is formed because the left brake 15 is in a braking state, the right planetary wheel 10 rotates around the planetary carrier 9, the right planetary wheel 10 is meshed with an internal gear 8 to transmit the power to the internal gear 8, the internal gear 8 drives a lower gear 7 to rotate, the lower gear 7 is meshed with an upper gear 19, and the power is transmitted to the outside through a differential mechanism 18.
2. Shifting
When the left brake 15 is connected, the right brake 14 is disconnected, the left brake shaft 13 is fixed by rotation, the planet carrier 9 is fixed by rotation, and the gear train is changed from a fixed-axis gear train to a differential gear train.
When the right brake 14 is connected, the right brake 15 is disconnected, the planet carrier 9 is fixed by rotation, the left brake shaft 13 is fixed by rotation, and the gear train is changed from a differential gear train to an ordinary gear train.
3. Reverse gear (R position)
(1) Reverse gear one gear (R1 gear)
The motor 1 rotates reversely, the left brake 15 is separated, the right brake 14 is electrically connected, the gear system is a fixed-axis gear system, the planet carrier 9 is kept fixed, the small planet wheel 17 rotates around the planet carrier 9 with the left planet wheel 11 and the right planet wheel 10, and revolves around the input shaft 2, the left brake shaft 13 drives the sun wheel 16 to rotate in the same direction, the motor 1 transmits power to the input shaft 2, and drives the input shaft 2 to rotate, the input shaft 2 drives the central wheel 12 to rotate, the central wheel 12 transmits power to the small planet wheel 17 engaged with the central wheel 12, the small planet wheel 17 is engaged with the right planet wheel 10, the fixed-axis gear system is formed because the right brake 14 is in a braking state, the right planet wheel 10 rotates around the planet carrier 9, rotates around the input shaft 2, the right planet wheel 10 is engaged with the internal gear 8, power is transmitted to the internal gear 8, the internal gear 8 drives the lower gear 7 to rotate, the lower gear 7 is engaged, the power is transmitted to the outside via the differential mechanism 18.
(2) Reverse gear two-gear (R2 gear)
The motor 1 rotates reversely, the left brake is electrified 15 to be combined, the right brake 14 is separated, a gear system is a differential gear system, a left brake shaft 13 is kept fixed, a small planetary wheel 17 is transmitted by itself around a planetary carrier 9 with a left planetary wheel 11 and a right planetary wheel 10, the motor 1 transmits power to an input shaft 2 to drive the input shaft 2 to rotate, the input shaft 2 drives a central wheel 12 to rotate, the central wheel 12 transmits the power to the small planetary wheel 17 meshed with the central wheel, the small planetary wheel 17 is meshed with the right planetary wheel 10, the differential gear system is formed because the left brake 15 is in a braking state, the right planetary wheel 10 rotates by itself around the planetary carrier 9, the right planetary wheel 10 is meshed with an internal gear 8 to transmit the power to the internal gear 8, the internal gear 8 drives a lower gear 7 to rotate, the lower gear 7 is meshed with an upper gear 19, and the power is transmitted to the outside through a.
4. Braking device
The upper conical surface brake block 6, the lower conical surface brake block 5, the brake motor 3 and the screw rod 4 form a brake module; when the brake motor 3 drives the screw rod 4 to drive the lower conical surface brake block 5 to move leftwards, the upper conical surface brake block 6 is contacted with the lower conical surface brake block 5 to complete braking; when the brake motor 3 drives the screw rod 4 to drive the lower conical surface brake block 5 to move rightwards, the upper conical surface brake block 6 is separated from the lower conical surface brake block 5 to release braking; the function of the brake module is to contact and separate the upper conical brake block 5 from the lower conical brake block 4.
Claims (1)
1. A two-gear transmission mechanism comprises a brake module, a speed change module and a gear shifting module, and comprises a motor (1), an input shaft (2), a brake motor (3), a screw rod (4), a lower conical brake block (5), an upper conical brake block (6), a lower gear (7), an internal gear (8), a planet carrier (9), a right planet wheel (10), a left planet wheel (11), a central wheel (12), a left brake shaft (13), a right brake (14), a left brake (15), a sun wheel (16), a small planet wheel (17), a differential mechanism (18), an upper gear (19) and a shell (20); the brake module consists of a brake motor (3), a screw rod (4), a lower conical surface brake block (5) and an upper conical surface brake block (6); the conical surface brake block (5) is in centering connection with the upper conical surface brake block (6); the screw rod (4) and the lower conical surface brake block (5) form a screw pair, and the brake motor (3) is fixed on the shell (20); the speed changing module consists of the input shaft (2), the lower gear (7), the inner gear (8), the sun gear (16), the planet carrier (9), the right planet gear (10), the left planet gear (11), the central gear (12) and the small planet gear (17); wherein the input shaft (2) and the central wheel (12) form a rotating pair; the central wheel (12) and the small planet wheel (17) form a gear pair; the small planet wheel (17) and the planet carrier (9) form a revolute pair; the small planet wheel (17) and the right planet wheel (10) form a gear pair; the right planet wheel (10) is coaxially connected with the left planet wheel (11); the left planet wheel (11) and the sun wheel (16) form a gear pair; the gear shifting module is composed of a left brake shaft (13), a right brake (14) and a left brake (15); the inner ring of the right brake (14) is fixedly connected with the sun gear (16) through the left brake shaft (13); the outer ring of the right brake (14) is fixedly connected with the shell (20); the inner ring of the left brake (15) is fixedly connected with the planet carrier (9), and the outer ring of the left brake (15) is fixedly connected with the shell (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021432631.8U CN213145268U (en) | 2020-07-20 | 2020-07-20 | Two-gear transmission mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021432631.8U CN213145268U (en) | 2020-07-20 | 2020-07-20 | Two-gear transmission mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213145268U true CN213145268U (en) | 2021-05-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021432631.8U Active CN213145268U (en) | 2020-07-20 | 2020-07-20 | Two-gear transmission mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213145268U (en) |
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2020
- 2020-07-20 CN CN202021432631.8U patent/CN213145268U/en active Active
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