阅读说明：本技术 一种商用车同轴式两挡变速电驱动桥动力总成 (Commercial car coaxial type two-gear speed change electric drive axle power assembly ) 是由 唐航波 卢志坤 杨守亮 张生勇 于 2019-11-18 设计创作，主要内容包括：本发明公开了一种商用车同轴式两挡变速电驱动桥动力总成,包括驱动电机,所述驱动电机的输出端连接有变速器,所述变速器包括一级减速行星齿轮和二级减速行星齿轮,所述驱动电机的输出端通过外花键与一级减速行星齿轮相连接,所述一级减速行星齿轮的输出端与二级减速行星齿轮相连接,所述二级减速行星齿轮远离一级减速行星齿轮的一端通过齿圈连接有同步器,所述同步器的外侧部安装有换挡机构,所述同步器的端部安装有差速器,所述差速器的内侧安装有左半轴和右半轴；采用行星齿轮传动,利用行星齿轮体积小,速比大,多挡位传动,传动精确、动力性更佳；有效的的减小了动力总成的结构空间,节能环保。(The invention discloses a coaxial two-gear speed change electric drive axle power assembly of a commercial vehicle, which comprises a drive motor, wherein the output end of the drive motor is connected with a transmission, the transmission comprises a primary speed reduction planetary gear and a secondary speed reduction planetary gear, the output end of the drive motor is connected with the primary speed reduction planetary gear through an external spline, the output end of the primary speed reduction planetary gear is connected with the secondary speed reduction planetary gear, one end of the secondary speed reduction planetary gear, which is far away from the primary speed reduction planetary gear, is connected with a synchronizer through a gear ring, the outer side part of the synchronizer is provided with a gear shifting mechanism, the end part of the synchronizer is provided with a differential mechanism, and the inner side of the differential mechanism is provided with a left half; the planetary gear is adopted for transmission, and the planetary gear is small in size, large in speed ratio and multi-gear transmission, so that the transmission is accurate and the dynamic property is better; the structural space of the power assembly is effectively reduced, and the energy-saving and environment-friendly effects are achieved.)

1. The utility model provides a two keep off transaxle power assemblies of commercial car coaxial-type, includes driving motor (3), its characterized in that: the output of driving motor (3) is connected with derailleur (6), derailleur (6) include one-level reduction planetary gear (13) and second grade reduction planetary gear (12), the output of driving motor (3) is connected with one-level reduction planetary gear (13) through the external splines, the output of one-level reduction planetary gear (13) is connected with second grade reduction planetary gear (12), the one end that one-level reduction planetary gear (13) was kept away from in second grade reduction planetary gear (12) is connected with synchronizer (9) through the ring gear, shift mechanism (10) are installed to the outside portion of synchronizer (9), differential mechanism (11) are installed to the tip of synchronizer (9), left half axle (7) and right half axle (8) are installed to the inboard of differential mechanism (11), the outer end of left half axle (7) is connected with left wheel limit (5), the outer end of right half axle (8) is connected with right wheel limit (1), corresponds the outer casing surface mounting of left half axle (7) has stopper two (4), corresponds the outer casing surface mounting of right half axle (8) has stopper one (2).

2. A commercial vehicle coaxial two-speed transaxle powertrain as defined in claim 1, wherein: the driving motor (3), the transmission (6) and the differential (11) are all of hollow structures and are coaxially arranged.

3. A commercial vehicle coaxial two-speed transaxle powertrain as defined in claim 1, wherein: and a gear hub matched with a gear ring at the end part of the secondary reduction planetary gear (12) is arranged at the end part of the synchronizer (9).

4. A commercial vehicle coaxial two-speed transaxle powertrain as defined in claim 1, wherein: the second brake (4) and the first brake (2) are located on the same side of the drive axle.

5. A commercial vehicle coaxial two-speed transaxle powertrain as defined in claim 1, wherein: the differential (11) adopts a Laminar type differential.

Technical Field

The invention belongs to the technical field of new energy automobiles, and particularly relates to a coaxial two-gear speed change electric drive axle power assembly of a commercial vehicle.

Background

The electric drive axle is the final direction of the new energy automobile power assembly and is the most obvious difference with the traditional automobile power assembly. The possibility that the traditional axle factory exists as a pure mechanical industry department in the future cannot be said to be absent, but the integration of the motor, the electric control and the axle is also the development direction in the future. The electric drive axle concentrates the axle, the differential mechanism, the speed reducer, the speed changer, the motor, the electric control ECU and the like on the axle, so that a transmission shaft of a traditional vehicle is omitted;

and current electric drive axle, single motor + single reduction gear formula: the requirement on the rotating speed of the motor is high, the technical difficulty is high, and the reliability is poor; single motor + single transmission type: power interruption occurs during gear shifting, so that driving comfort and safety are affected; an external power assembly is adopted, the structural weight is required, and the external power assembly is not applied to a high-horsepower system; the externally-hung electric drive axle occupies a large space of the chassis, and the arrangement of other parts of the whole vehicle, particularly batteries, is not utilized, so that the endurance mileage of the whole vehicle is influenced; double-motor and double-gearbox type: the structure adopts two sets of power assembly schemes, the manufacturing cost is increased, the occupied chassis space is large, and an externally-hung system is not beneficial to high suspension requirement and later maintenance; the chassis of the commercial vehicle is mainly arranged in a mode of suspending an integral axle and a plate spring, one part of the axle type unsprung mass is integrated with an electric control part, the unsprung mass is increased, and the limited space is further occupied.

Disclosure of Invention

The invention aims to provide a coaxial two-gear speed change electric drive axle power assembly of a commercial vehicle, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a two keep off transaxle power assemblies of commercial car coaxial-type, includes driving motor, driving motor's output is connected with the derailleur, the derailleur includes one-level reduction planetary gear and second grade reduction planetary gear, driving motor's output is connected with one-level reduction planetary gear through the external splines, one-level reduction planetary gear's output is connected with second grade reduction planetary gear, the one end that second grade reduction planetary gear kept away from one-level reduction planetary gear is connected with the synchronous ware through the ring gear, the outside portion of synchronous ware is installed the gearshift, differential mechanism is installed to the tip of synchronous ware, left semi-axis and right semi-axis are installed to the inboard of differential mechanism, the outer end of left semi-axis is connected with left wheel limit, the outer end of right semi-axis is connected with right wheel limit, corresponds the shell body surface mounting of left semi-axis has, and a first brake is arranged on the surface of the outer shell corresponding to the right half shaft.

Preferably, the driving motor, the transmission and the differential are all hollow structures and are coaxially arranged.

Preferably, the end part of the synchronizer is provided with a gear hub matched with the end gear ring of the secondary reduction planetary gear.

Preferably, the second brake and the first brake are located on the same side of the drive axle.

Preferably, the differential is a lambda type differential.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the planetary gear is adopted for transmission, and the planetary gear is small in size, large in speed ratio and multi-gear transmission, so that the transmission is accurate and the dynamic property is better; the structural space of the power assembly is effectively reduced, and the energy-saving and environment-friendly effects are achieved.

2. The invention adopts the planetary gear to reduce speed, has the advantages of high transmission precision, high rigidity, high transmission efficiency, large transmission speed ratio, maintenance-free property and the like, realizes gear shifting by using a synchronizer and a gear shifting fork, and is reliable, simple and safe compared with a wet clutch/brake gear shifting mechanism.

3. According to the AMT automatic gear shifting mechanism, the conventional AMT automatic gear shifting mechanism is adopted, the technology is mature, the cost is lower, the driving is more comfortable and safer, the Lamena type differential is adopted, the structure is simple and ingenious, the axial size is smaller, and the arrangement space is effectively saved.

4. In the invention, a two-gear gearbox mechanism is adopted, and a high-speed-ratio gear is adopted during starting and climbing, so that the dynamic property is stronger; the high-speed running adopts the small speed ratio driving, thereby being more energy-saving and economical.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic top cross-sectional view of the present invention;

fig. 3 is a partially enlarged structural view of fig. 2 according to the present invention.

In the figure: 1. a right wheel side; 2. a first brake; 3. a drive motor; 4. a second brake; 5. a left wheel edge; 6. a transmission; 7. a left half shaft; 8. a right half shaft; 9. a synchronizer; 10. a gear shift mechanism; 11. a differential mechanism; 12. a secondary reduction planetary gear; 13. a primary reduction planetary gear.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a coaxial two-gear speed change electric drive axle power assembly for a commercial vehicle comprises a drive motor 3, the output end of the drive motor 3 is connected with a transmission 6, the transmission 6 comprises a primary speed reduction planetary gear 13 and a secondary speed reduction planetary gear 12, the output end of the drive motor 3 is connected with the primary speed reduction planetary gear 13 through an external spline, the output end of the primary speed reduction planetary gear 13 is connected with the secondary speed reduction planetary gear 12, one end of the secondary speed reduction planetary gear 12 far away from the primary speed reduction planetary gear 13 is connected with a synchronizer 9 through a gear ring, the outer side part of the synchronizer 9 is provided with a gear shifting mechanism 10, the end part of the synchronizer 9 is provided with a differential mechanism 11, the inner side of the differential mechanism 11 is provided with a left half shaft 7 and a right half shaft 8, the outer end of the left half shaft 7 is connected with a left wheel edge 5, the outer end of the right half, the first brake 2 is arranged on the surface of the outer shell corresponding to the right half shaft 8.

The driving motor 3, the transmission 6 and the differential 11 are all hollow structures and are coaxially arranged.

Wherein, the end part of the synchronizer 9 is provided with a gear hub matched with a gear ring at the end part of the secondary reduction planetary gear 12.

And the second brake 4 and the first brake 2 are positioned at the same side of the drive axle.

The differential 11 is a lambda differential.

The working principle and the using process of the invention are as follows: the output of the driving motor 3 is connected with the sun gear of a first-stage reduction planetary gear 13 by adopting an external spline, the gear ring of the first-stage reduction planetary gear 13 is connected with the shell, the sun gear is actively driven, the planet carrier outputs power to the sun gear of a second-stage reduction planetary gear 12, the gear ring of the second-stage reduction planetary gear 12 is connected with the gear hub of a synchronizer 9, the planet carrier is connected with the left combination gear of the synchronizer 9, the power is input from the sun gear, the right combination gear of the synchronizer 9 is connected with the planet carrier of the second-stage reduction planetary gear 12, a gear shifting mechanism 10 pushes a gear shifting block to push the gear ring of the synchronizer 9 to move left and right for gear shifting by shifting a gear shifting fork, when the gear ring of the synchronizer 9 is shifted in a gear shifting way to the right, the gear ring of the second-stage reduction planetary gear 12 is connected with the shell by the synchronizer 9, which, the synchronizer 9 connects the secondary gear ring with the planet carrier, which is equivalent to the connection of two elements of a secondary reduction planetary gear 12, the secondary gear set transmits with small speed ratio, and the brake II 4 and the brake I2 which are respectively close to the left wheel edge 5 and the right wheel edge 1 can brake the automobile when the automobile is running or parked.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.