阅读说明：本技术 一种湿式三离合三挡变速箱 (Wet-type three-clutch three-gear transmission ) 是由 王超 刘海洋 程林 张 吴文山 于 2020-05-15 设计创作，主要内容包括：本发明涉及电动汽车变速箱领域,公开了一种湿式三离合三挡变速箱,包括输入轴总成、换挡拨叉轴总成、中间轴总成和主减速器总成；输入轴总成包括输入轴,输入轴上分别依次设有III挡主动齿轮、II挡主动齿轮和I挡主动齿轮；III挡主动齿轮连接有III挡湿式离合器总成；II挡主动齿轮连接有II挡湿式离合器总成；I挡主动齿轮连接有I挡湿式离合器总成；换挡拨叉轴总成分别与III挡湿式离合器总成、II挡湿式离合器总成、I挡湿式离合器总成连接,换挡拨叉轴总成用于挡位切换；主减速器总成包括主减速器从动齿轮和差速器。本发明换挡操作简单,换挡时只需操纵离合器即可实现换挡；换挡时动力无中断,换挡平稳动力传递无冲击；使用寿命长、故障率低。(The invention relates to the field of electric automobile gearboxes, and discloses a wet three-clutch three-gear gearbox, which comprises an input shaft assembly, a gear shifting fork shaft assembly, an intermediate shaft assembly and a main reducer assembly, wherein the gear shifting fork shaft assembly is arranged on the input shaft assembly; the input shaft assembly comprises an input shaft, and a gear III driving gear, a gear II driving gear and a gear I driving gear are sequentially arranged on the input shaft respectively; the III-gear driving gear is connected with a III-gear wet clutch assembly; the II gear driving gear is connected with a II gear wet clutch assembly; the I gear driving gear is connected with an I gear wet clutch assembly; the gear shifting fork shaft assembly is respectively connected with the III-gear wet clutch assembly, the II-gear wet clutch assembly and the I-gear wet clutch assembly, and is used for gear switching; the final drive assembly includes a final drive driven gear and a differential. The gear shifting device is simple in gear shifting operation, and gear shifting can be realized by only operating the clutch during gear shifting; the power is not interrupted during gear shifting, and the power transmission is stable without impact during gear shifting; long service life and low failure rate.)

1. A wet-type three-clutch three-gear transmission is characterized by comprising an input shaft assembly, a gear shifting fork shaft assembly, an intermediate shaft assembly and a main speed reducer assembly; the axes of the input shaft assembly, the gear shifting fork shaft assembly, the intermediate shaft assembly and the main speed reducer assembly are parallel to each other; the input shaft assembly comprises an input shaft, and a gear III driving gear, a gear II driving gear and a gear I driving gear are sequentially arranged on the input shaft respectively; the III-gear driving gear is connected with a III-gear wet clutch assembly; the II gear driving gear is connected with an II gear wet clutch assembly; the I-gear driving gear is connected with an I-gear wet clutch assembly; the gear shifting fork shaft assembly is respectively connected with the gear III wet clutch assembly, the gear II wet clutch assembly and the gear I wet clutch assembly, and is used for gear switching; the main speed reducer assembly comprises a main speed reducer driven gear and a differential mechanism; the differential mechanism is connected with a transmission shaft, and the differential mechanism drives wheels to rotate through the transmission shaft.

2. The wet three-clutch three-speed gearbox of claim 1, wherein the III-speed wet clutch comprises a III-speed clutch driven disc, a III-speed clutch driving disc, a III-speed clutch shift fork and a III-speed clutch sleeve; the II-gear clutch assembly comprises a II-gear clutch driven disc, a II-gear clutch driving disc, a II-gear clutch shifting fork and a II-gear clutch sleeve; the I-gear clutch assembly comprises an I-gear clutch driven disc, an I-gear clutch driving disc, an I-gear clutch shifting fork and an I-gear clutch sleeve.

3. The wet three-clutch three-speed gearbox according to claim 1 or 2, wherein the third-gear clutch driving disk, the second-gear clutch driving disk and the first-gear clutch driving disk are respectively fixedly connected with an input shaft; the III-gear driving gear is fixedly connected with the III-gear clutch driven disc; the II gear driving gear is fixedly connected with the II gear clutch driven disc; the I-gear driving gear is fixedly connected with the I-gear clutch driven disc.

4. The wet three-clutch three-gear gearbox according to claim 3, wherein the shift fork shaft assembly comprises a shift fork shaft, and a third-gear shift fork, a second-gear shift fork and a first-gear shift fork are sequentially arranged on the shift fork shaft; the III gear shifting fork is connected with the III gear clutch sleeve, and the position of the III gear shifting fork corresponds to the position of the III gear clutch sleeve; the gear II shifting fork is connected with the gear II clutch sleeve, and the position of the gear II shifting fork corresponds to the position of the gear II clutch sleeve; the I-gear shifting fork is connected with the I-gear clutch sleeve, and the position of the I-gear shifting fork corresponds to the position of the I-gear clutch sleeve.

5. The wet three-clutch three-gear gearbox according to claim 4, wherein the intermediate shaft assembly comprises an intermediate shaft, two ends of the intermediate shaft are respectively provided with an intermediate shaft bearing, and the intermediate shaft is sequentially provided with an intermediate shaft driving gear, an intermediate shaft III-gear driven gear, an intermediate shaft II-gear driven gear and an intermediate shaft I-gear driven gear; the intermediate shaft III gear driven gear is meshed with the III gear driving gear; the intermediate shaft II gear driven gear is meshed with the II gear driving gear; the I-gear driven gear of the intermediate shaft is meshed with the I-gear driving gear.

6. The wet three-clutch three-speed transmission according to claim 1 or 5, wherein the final drive driven gear is meshed with the countershaft driving gear; the differential comprises a half shaft gear and a planetary gear; and the driven gear of the main speed reducer is fixedly connected with the differential through bolts.

7. The wet three-clutch three-speed transmission according to claim 6, wherein a final drive bearing is connected to each end of the final drive assembly.

Technical Field

The invention relates to the field of electric automobile gearboxes, in particular to a wet three-clutch three-gear gearbox.

Background

With the decreasing of petroleum resources and the increasing of air pollution, new energy automobiles are becoming development hotspots, especially the development of electric automobiles, and become the key point of new energy development. At present, the electric automobile is basically not provided with a speed change device, and the existing electric automobile can only adopt a single-stage speed reducer because the technology of a speed changer which is suitable for the electric automobile is immature. With the development of science and technology, people improve the electric automobile gearbox, for example, the national patent publication CN201884571U discloses a 'fast-slow gear electric automobile gearbox', wherein a motor output shaft, a gap bridge axle and a gearbox output axle are arranged in a shell of the utility model; the output shaft of the motor is respectively connected with the shell and the motor; the motor output shaft is connected with a motor high-speed output wheel, a motor low-speed output wheel and a motor driving wheel; grooves and protrusions are respectively arranged on the high-speed output wheel and the low-speed output wheel of the motor and are correspondingly inserted with the driving wheel of the motor in a sliding manner; the outer side surface of the motor driving wheel is fixedly connected with a shifting fork; the gap bridge wheel shaft is sequentially connected with a first transmission gap bridge wheel, a second transmission gap bridge wheel, a third transmission gap bridge wheel and a fourth transmission gap bridge wheel which coaxially rotate; the first, second, third and fourth transmission gap bridge wheels are respectively in meshing transmission connection with the high-speed output wheel of the motor, the driving wheel of the motor and the low-speed output wheel of the motor; and the third transmission gap bridge wheel is in meshed transmission connection with the output wheel of the gearbox.

The utility model solves the gear shifting problem of the electric vehicle, but can not meet more requirements of the vehicle on different speeds and torques under different road conditions and load conditions; the gear shifting is not stable, and the power transmission has impact; and the shifting fork is connected to the driving wheel of the motor, so that the motor is easily damaged during gear shifting, and mechanical faults are caused.

Disclosure of Invention

The invention aims to provide a wet type three-clutch three-gear transmission, so that multi-gear shifting without stopping of an electric automobile is realized, and non-power-interruption shifting switching is realized, so that more requirements of the automobile on different speeds and torques under different road conditions and load conditions are met.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a wet-type three-clutch three-gear transmission comprises an input shaft assembly, a gear shifting fork shaft assembly, an intermediate shaft assembly and a main speed reducer assembly; the axes of the input shaft assembly, the gear shifting fork shaft assembly, the intermediate shaft assembly and the main reducer assembly are parallel to each other; the input shaft assembly comprises an input shaft, and a gear III driving gear, a gear II driving gear and a gear I driving gear are sequentially arranged on the input shaft respectively; the III-gear driving gear is connected with a III-gear wet clutch assembly; the II gear driving gear is connected with a II gear wet clutch assembly; the I gear driving gear is connected with an I gear wet clutch assembly; the gear shifting fork shaft assembly is respectively connected with the III-gear wet clutch assembly, the II-gear wet clutch assembly and the I-gear wet clutch assembly, and is used for gear switching; the main reducer assembly comprises a main reducer driven gear and a differential mechanism; the differential is connected with a transmission shaft, and the differential drives the wheels to rotate through the transmission shaft.

Furthermore, the III-gear wet clutch assembly comprises a driven plate of the III-gear clutch, a driving plate of the III-gear clutch, a shifting fork of the III-gear clutch and a clutch sleeve of the III-gear clutch; the II-gear clutch assembly comprises a II-gear clutch driven disc, a II-gear clutch driving disc, a II-gear clutch shifting fork and a II-gear clutch sleeve; the I-gear clutch assembly comprises an I-gear clutch driven disc, an I-gear clutch driving disc, an I-gear clutch shifting fork and an I-gear clutch sleeve.

Further, a driving disc of the III-gear clutch, a driving disc of the II-gear clutch and a driving disc of the I-gear clutch are respectively and fixedly connected with the input shaft; the III-gear driving gear is fixedly connected with a III-gear clutch driven disc; the II gear driving gear is fixedly connected with the II gear clutch driven disc; the I-gear driving gear is fixedly connected with the I-gear clutch driven disc.

Further, the gear shifting fork shaft assembly comprises a gear shifting fork shaft, and a gear III gear shifting fork, a gear II shifting fork and a gear I shifting fork are sequentially arranged on the gear shifting fork shaft; the III-gear shifting fork is connected with the III-gear clutch sleeve, and the position of the III-gear shifting fork corresponds to the position of the III-gear clutch sleeve; the gear-II shifting fork is connected with the gear-II clutch sleeve, and the position of the gear-II shifting fork corresponds to the position of the gear-II clutch sleeve; the I-gear shifting fork is connected with the I-gear clutch sleeve, and the position of the I-gear shifting fork corresponds to the position of the I-gear clutch sleeve.

Further, the intermediate shaft assembly comprises an intermediate shaft, wherein intermediate shaft bearings are respectively arranged at two ends of the intermediate shaft, and an intermediate shaft driving gear, an intermediate shaft III-gear driven gear, an intermediate shaft II-gear driven gear and an intermediate shaft I-gear driven gear are sequentially arranged on the intermediate shaft; the intermediate shaft III gear driven gear is meshed with the III gear driving gear; the intermediate shaft II gear driven gear is meshed with the II gear driving gear; the I-gear driven gear of the intermediate shaft is meshed with the I-gear driving gear.

Further, a driven gear of the main speed reducer is meshed with a driving gear of the intermediate shaft; the differential mechanism comprises a half shaft gear and a planetary gear; and the driven gear of the main speed reducer is fixedly connected with the differential through bolts.

Furthermore, two ends of the main reducer assembly are respectively connected with a main reducer bearing.

The invention has the beneficial effects that: the gear shifting operation is simple, and the gear shifting can be realized only by operating the clutch during gear shifting; the power is not interrupted during gear shifting, and the power transmission is stable without impact during gear shifting; long service life and low failure rate.

Drawings

Fig. 1 is a schematic structural diagram of a wet three-clutch three-gear transmission provided in the first embodiment.

1. An input shaft, a 2-gear driving gear, a III-gear driving gear, a 3-gear clutch driven disc, a 4-gear clutch driving disc, a III-gear clutch fork, a 6-gear clutch sleeve, a 7-gear driving gear, a II-gear driving gear, a 8-gear clutch driven disc, a 9-gear clutch driving disc, a 10-gear clutch fork, a 11-gear clutch sleeve, a 12-gear driving gear, a 13-gear clutch driven disc, a 14-gear clutch driving disc, a 15-gear clutch fork, a 16-gear clutch sleeve, a 17-gear driving gear, a 18-gear driven gear, a 19-gear driven gear, a 20-gear driven gear, a 21-gear shifting fork shaft, a 22-gear bearing, a 23-gear driven gear, a 24-gear, a half-shaft gear, a 25-gear, a planet gear, a 26-gear bearing, a 27-gear shifting fork, 28. the gear shifting fork is arranged at the gear II, and the gear shifting fork is arranged at the gear 29 and the gear I.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order, and it should be understood that the terms so used are interchangeable under appropriate circumstances and are merely used to describe the distinguishing manner in which the embodiments of the present invention distinguish between similar elements. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of elements is not necessarily limited to those elements, but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.