阅读说明：本技术 一种多档电驱变速箱 (Multi-gear electrically-driven gearbox ) 是由 聂征 陈志明 郝华 于 2019-09-20 设计创作，主要内容包括：本发明公开了一种多档电驱变速箱,属于电动汽车变速箱领域,包括：第一驱动电机和第二驱动电机；第一输入轴和第二输入轴,第一输入轴上固定套装有输入轴第一齿轮、输入轴第二齿轮；第二输入轴上固定套装有输入轴第三齿轮；输出轴；输出轴可转动安装有输出轴第一齿轮、输出轴第二齿轮和输出轴第三齿轮,单向离合器,其设置在第二输入轴或输出轴上用于控制输入轴第三齿轮与输出轴第三齿轮啮合；电磁离合器件,其固定套装在输出轴上,用于控制输出轴第一齿轮与输入轴第一齿轮、输出轴第二齿轮与输入轴第二齿轮的接合。避免了输出转矩过高造成电量利用率下降的问题。有效地提高了车辆的经济性。(the invention discloses a multi-gear electrically-driven gearbox, which belongs to the field of electric automobile gearboxes and comprises: a first drive motor and a second drive motor; the first input shaft is fixedly sleeved with an input shaft first gear and an input shaft second gear; a third gear of the input shaft is fixedly sleeved on the second input shaft; an output shaft; the output shaft is rotatably provided with an output shaft first gear, an output shaft second gear and an output shaft third gear, and the one-way clutch is arranged on the second input shaft or the output shaft and used for controlling the input shaft third gear to be meshed with the output shaft third gear; and the electromagnetic clutch device is fixedly sleeved on the output shaft and is used for controlling the connection of the first output shaft gear and the first input shaft gear and the connection of the second output shaft gear and the second input shaft gear. The problem of electric quantity utilization rate reduction caused by overhigh output torque is avoided. The economy of the vehicle is effectively improved.)

1. A multiple speed electrically driven transmission, comprising:

a first drive motor and a second drive motor;

the first input shaft is connected with the output end of a first driving motor, a first gear of the input shaft and a second gear of the input shaft are fixedly sleeved on the first input shaft, the second input shaft is connected with the output end of a second driving motor, and a third gear of the input shaft is fixedly sleeved on the second input shaft;

An output shaft; the output shaft is rotatably provided with an output shaft first gear, an output shaft second gear and an output shaft third gear, the output shaft first gear is correspondingly meshed with the input shaft first gear, the output shaft second gear is correspondingly meshed with the input shaft second gear, and the output shaft third gear is correspondingly meshed with the input shaft third gear;

A one-way clutch provided on the second input shaft or the output shaft for controlling the engagement of the input shaft third gear with the output shaft third gear;

And the electromagnetic clutch device is fixedly sleeved on the output shaft and is used for controlling the connection of the first output shaft gear and the first input shaft gear and the connection of the second output shaft gear and the second input shaft gear.

2. A multiple speed electrically driven transmission as defined in claim 1, wherein: the electromagnetic clutch device comprises a first electromagnetic clutch and a second electromagnetic clutch, the first electromagnetic clutch and the second electromagnetic clutch are fixedly sleeved on the output shaft, the first electromagnetic clutch is used for controlling the first gear of the output shaft to be connected with the output shaft, and the second electromagnetic clutch is used for controlling the second gear of the output shaft to be connected with the output shaft.

3. A multiple speed electrically driven transmission as defined in claim 2, wherein: the first electromagnetic clutch and the second electromagnetic clutch each include:

The clutch armature is sleeved on the output shaft and is fixedly connected with the output shaft first gear and the output shaft second gear;

The clutch friction plate set is sleeved on the output shaft through a key connection;

And the clutch magnet yoke is fixedly sleeved on the output shaft and is matched with the clutch friction plate.

4. A multiple speed electrically driven transmission as defined in claim 2, wherein: and the first electromagnetic clutch and the second electromagnetic clutch are both connected with a power supply through coils.

5. A multiple speed electrically driven transmission as defined in claim 1, wherein: and the outer ring of the one-way clutch is fixedly connected with the third gear of the input shaft, and the inner ring of the one-way clutch is fixedly connected with the input shaft.

Technical Field

The invention relates to the technical field of electric automobile gearboxes, in particular to a multi-gear electrically-driven gearbox.

background

at present, a pure electric bus is mostly driven by a single motor, a single-stage gearbox causes torque output generated by the motor to be completed at one time, perhaps uninterrupted power output is beneficial to starting acceleration, but is not beneficial to the economy and comfort of the bus, and the gearbox can not increase gears without limit in consideration of the problems of light weight and size, so that a multi-gear gearbox with a reasonable speed ratio range needs to be matched.

Disclosure of Invention

The present invention is directed to a multi-speed electrically driven transmission to solve the above problems.

To achieve the above object, the present invention provides a multiple speed electrically driven transmission comprising: a first drive motor and a second drive motor; the first input shaft is connected with the output end of a first driving motor, and a first gear and a second gear of the input shaft are fixedly sleeved on the first input shaft; the second input shaft is connected with the output end of a second driving motor, and a third gear of the input shaft is fixedly sleeved on the second input shaft; an output shaft; the output shaft is rotatably provided with an output shaft first gear, an output shaft second gear and an output shaft third gear, the output shaft first gear is correspondingly meshed with the input shaft first gear, the output shaft second gear is correspondingly meshed with the input shaft second gear, and the output shaft third gear is correspondingly meshed with the input shaft third gear; a one-way clutch provided on the second input shaft or the output shaft for controlling the engagement of the input shaft third gear with the output shaft third gear; and the electromagnetic clutch device is fixedly sleeved on the output shaft and is used for controlling the connection of the first output shaft gear and the first input shaft gear and the connection of the second output shaft gear and the second input shaft gear.

Furthermore, the electromagnetic clutch device comprises a first electromagnetic clutch and a second electromagnetic clutch, the first electromagnetic clutch and the second electromagnetic clutch are fixedly sleeved on the output shaft, the first electromagnetic clutch is used for controlling the first gear of the output shaft to be connected with the output shaft, and the second electromagnetic clutch is used for controlling the second gear of the output shaft to be connected with the output shaft.

further, the first electromagnetic clutch and the second electromagnetic clutch each include: the clutch armature is sleeved on the output shaft and is fixedly connected with the output shaft first gear and the output shaft second gear; the clutch friction plate set is sleeved on the output shaft through a key connection; and the clutch magnet yoke is fixedly sleeved on the output shaft and is matched with the clutch friction plate.

further, the first electromagnetic clutch and the second electromagnetic clutch are both connected with a power supply through coils.

Furthermore, the outer ring of the one-way clutch is fixedly connected with the third gear of the input shaft, and the inner ring of the one-way clutch is fixedly connected with the input shaft.

By applying the technical scheme of the invention, the beneficial effects are as follows: the vehicle can carry out many grades of variable speeds, adapt to the power requirement under the different road conditions, the problem of output torque too high causes electric quantity utilization ratio to descend has been avoided, the economic nature of vehicle has been improved effectively, cooperation through first electromagnetic clutch and second electromagnetic clutch has simplified the inside structure of gearbox, thereby realize lightweight design, adopt two motor coupling moreover, make the output torque of two motors can superpose, the dynamic behavior of vehicle has been increased, the travelling comfort of vehicle has been improved effectively.

Drawings

the accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.

in the drawings:

FIG. 1 shows an overall block diagram of the present invention;

Fig. 2 shows a schematic representation of the 2-speed transmission line of the electrically driven gearbox of the invention.

wherein the figures include the following reference numerals:

10. A first drive motor; 11. a first input shaft; 12. an input shaft first gear; 13. an input shaft second gear; 20. an output shaft; 21. an output shaft first gear; 22. an output shaft second gear; 23. a first electromagnetic clutch; 24. a second electromagnetic clutch; 25. an output shaft third gear; 30. a second drive motor; 31. a one-way clutch; 32. an input shaft third gear; 33. a second input shaft.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1, the present invention provides a multiple speed electrically driven transmission comprising: the clutch comprises a first driving motor 10, a first input shaft 11, an input shaft first gear 12, an input shaft second gear 13, an output shaft 20, an output shaft first gear 21, an output shaft second gear 22, a first electromagnetic clutch 23 and a second electromagnetic clutch 24. The first input shaft 11 is connected with the output end of the first driving motor 10, the first input shaft gear 12 and the second input shaft gear 13 are respectively and fixedly sleeved at the left end and the right end of the first input shaft 11 and synchronously rotate along with the first input shaft 11, and the first output shaft gear 21 and the second output shaft gear 22 are rotatably installed on the output shaft 20.

in the present embodiment, the first electromagnetic clutch 23 and the second electromagnetic clutch 24 are both energized by a coil to enable energization of the first electromagnetic clutch 23 and the second electromagnetic clutch 24.

Wherein, the first electromagnetic clutch 23 and the second electromagnetic clutch 24 each include: a clutch armature which is sleeved on the output shaft 20 and is fixedly connected with the output shaft first gear 21 and the output shaft second gear 22; a clutch friction plate set which is sleeved on the output shaft 20 through key connection; the clutch yoke is fixedly sleeved on the output shaft 20 and matched with the clutch friction plate, the clutch yoke attracts the clutch armature by switching on a power supply, the clutch friction plate set is pressed tightly, the rotating torque of the output shaft first gear 21 and the output shaft second gear 22 is transmitted to the inner friction plate through the outer friction plate by means of the friction force between the inner friction plate and the outer friction plate, and the spline shaft is driven to rotate by the inner friction plate, so that the torque is transmitted.

The multiple-speed electrically driven gearbox further comprises a second drive motor 30, a one-way clutch 31, a second input shaft 33, an input shaft third gear 32, and an output shaft third gear 25. The second input shaft 33 is connected with the output end of the second driving motor 30, the input shaft third gear 32 is fixedly sleeved on the second input shaft 33 and synchronously rotates with the second input shaft 33, and the output shaft third gear 25 is rotatably arranged on the output shaft 20.

as shown in fig. 1, the outer race of the one-way clutch 31 is fixedly connected to the input shaft third gear 32, and the inner race is fixedly connected to the input shaft.

As shown in fig. 2, taking an electric vehicle moving forward in 2-gear as an example, the clutch yoke is controlled to attract the clutch armature, the clutch friction plate set is pressed tightly, the rotating torque of the input shaft first gear 12 and the output shaft second gear 22 is transmitted to the inner friction plate through the outer friction plate by means of the friction force between the inner friction plate and the outer friction plate, the output shaft is driven to rotate by the inner friction plate, at this time, the transmission is switched to 2-gear, and the power is output along the first input shaft 11, the input shaft second gear 13, the output shaft second gear 22, the outer friction plate, the inner friction plate and the output shaft 20.

The transmission principle of each mode is as follows:

The first mode is as follows: first gear

First drive motor → first input shaft → input shaft first gear → output shaft first gear 21 → output shaft.

And a second mode: second gear

First drive motor → first input shaft → input shaft second gear → output shaft.

And a third mode: three-gear

Second drive motor → second input shaft → third gear of output shaft → output shaft.

and a fourth mode: two-gear combination

the first driving motor drives the first gear, the second driving motor drives the second gear, and the second gear assists the first gear to output power by controlling the coupling rotating speed of the double motors.

And a fifth mode: one-three combined gear

The first driving motor drives the first gear, the second motor drives the third gear, and the third gear and the first gear are assisted to output power by controlling the coupling rotating speed of the double motors.

The first input shaft and the second input shaft are coaxially arranged, and only one gear box is needed.

Through power switching or combination between the two driving motors, the gearbox realizes power transmission output of any one motor or simultaneous power transmission output of the two motors, namely power output of five modes including a first mode, a second mode, a third mode, a first combined gear, a second combined gear and a third combined gear, and can adapt to various working conditions of a vehicle.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

1. the vehicle can carry out multi-gear speed change, the power requirements under different road conditions are met, the problem that the electric quantity utilization rate is reduced due to overhigh output torque is solved, and the economical efficiency of the vehicle is effectively improved;

2. Through the matching of the first electromagnetic clutch and the second electromagnetic clutch, the structure inside the gearbox is simplified, and therefore the light design is realized;

3. By adopting the double-motor coupling, the output torques of the two motors can be superposed, the power performance of the vehicle is improved, and the comfort of the vehicle is effectively improved.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.