阅读说明：本技术 一种双电机横置可换挡电驱桥减速器总成 (Double-motor transverse shiftable electric drive bridge reducer assembly ) 是由 姚哲皓 刘华军 于 2019-12-16 设计创作，主要内容包括：本发明公开一种双电机横置可换挡电驱桥减速器总成,包括两个电机、两个换挡总成、行星减速齿轮总成和差速器总成；换挡总成包括一轴总成和二轴总成,所述电机与一轴总成连接；通过一轴总成上的滑动啮合组件实现高速、低速两档调速；二轴总成通过长啮合齿轮组与行星减速齿轮总成的太阳轮轴传动；行星减速齿轮总成的行星架与差速器总成的差速器内壳通过行星轴连接,齿圈与差速器壳连接。本发明结构紧凑,集成度高,加工难度低,重量轻。(The invention discloses a double-motor transverse shiftable electrically-driven axle reducer assembly which comprises two motors, two gear shifting assemblies, a planetary reduction gear assembly and a differential mechanism assembly, wherein the two motors are arranged on the two sides of the gear shifting assemblies; the gear shifting assembly comprises a first shaft assembly and a second shaft assembly, and the motor is connected with the first shaft assembly; the high-speed and low-speed two-gear speed regulation is realized through a sliding engagement component on a shaft assembly; the two-shaft assembly is in transmission with a sun gear shaft of the planetary reduction gear assembly through the long-meshed gear set; the planet carrier of the planetary reduction gear assembly is connected with the differential inner shell of the differential assembly through a planet shaft, and the gear ring is connected with the differential shell. The invention has compact structure, high integration level, low processing difficulty and light weight.)

1. The utility model provides a bi-motor horizontal shiftable electrically driven bridge reduction gear assembly which characterized in that: the gear shifting device comprises two motors, two gear shifting assemblies, a planetary reduction gear assembly and a differential assembly; each motor is independently connected with the planetary reduction gear assembly through a gear shifting assembly; each gear shifting assembly works independently and comprises a first shaft assembly and a second shaft assembly, and the high-speed and low-speed two-gear speed regulation of the first shaft assembly and the second shaft assembly is realized independently through a sliding engagement component on the first shaft assembly; each two-shaft assembly is in transmission with a sun gear shaft of the planetary reduction gear assembly through a long meshing gear set; the planet carrier of the planetary reduction gear assembly is connected with the differential inner shell of the differential assembly through a planet shaft, and the gear ring is connected with the differential shell.

2. The dual-motor transverse shiftable electric drive axle reducer assembly of claim 1, wherein: the gear shifting assembly and the long meshing gear set are positioned in a first space enclosed by a left transmission shell and a right transmission shell; the planetary reduction gear assembly is positioned in a second space enclosed by the differential shell and the transmission left shell; one end of the sun wheel shaft is positioned in the first space, and the other end of the sun wheel shaft is positioned in the second space.

3. The dual-motor transverse shiftable electric drive axle reducer assembly according to claim 1 or 2, wherein: an axle assembly includes an axle, an axle high-speed gear driving gear, an axle low-speed gear driving gear, the slip meshing subassembly includes: a sliding meshing sleeve and a fixed tooth holder; the two-shaft assembly comprises a two-gear shaft, a two-shaft high-speed driven gear and a two-shaft low-speed driven gear; the first-shaft high-speed driving gear is meshed with the second-shaft high-speed driven gear, and the first-shaft low-speed driving gear is meshed with the second-shaft low-speed driven gear; the sliding engagement assembly is located between a first high gear drive gear and a first low gear drive gear.

4. The dual-motor transverse shiftable electric drive axle reducer assembly of claim 3, wherein: the first shaft high-speed gear driving gear and the first shaft low-speed gear driving gear are connected with a first shaft needle roller bearing.

5. The dual-motor transverse shiftable electric drive axle reducer assembly of claim 3, wherein: the fixed tooth holder is fixed with a shaft spline, and the sliding meshing sleeve is in spline connection with the fixed tooth holder.

6. The dual-motor transverse shiftable electric drive axle reducer assembly of claim 1, wherein: and the two-shaft high-speed driven gear and the two-shaft low-speed driven gear are in interference fit with the two-gear shaft.

7. The dual-motor transverse shiftable electric drive axle reducer assembly according to claim 1 or 2, wherein: the long meshing gear set comprises a cylindrical gear arranged on the two-shaft assembly and a second-stage reduction driven gear arranged on the sun gear shaft, and the cylindrical gear and the second-stage reduction driven gear are in constant meshing.

8. The dual-motor transverse shiftable electric drive axle reducer assembly of claim 7, wherein: the two-shaft assembly comprises two shafts, and the cylindrical gear and the two shafts are of an integrated structure.

9. The dual-motor transverse shiftable electric drive axle reducer assembly of claim 7, wherein: and the secondary reduction driven gear is in interference fit with the sun wheel shaft.

10. The dual-motor transverse shiftable electric drive axle reducer assembly of claim 7, wherein: the two-stage reduction driven gear is connected with the transmission left shell and the transmission right shell through conical bearings.

Technical Field

The invention belongs to the technical field of commercial vehicle speed reducers, and particularly relates to a double-motor transverse shiftable electrically-driven bridge speed reducer assembly.

Background

Chinese patent, publication No. CN109372950A, publication No. 2019.02.22, discloses a vertical coaxial shiftable electric drive axle reduction gearbox assembly, which comprises a motor, a shaft assembly, an intermediate shaft assembly, a main bevel shaft assembly and a differential assembly, wherein the intermediate shaft assembly comprises an intermediate shaft, an intermediate shaft normally meshed gear and an intermediate shaft low-speed gear, the main bevel shaft assembly comprises a driving bevel gear, a main bevel shaft low-speed gear and a fixed gear seat, the motor is connected with the shaft assembly, the shaft assembly is meshed with the intermediate shaft normally meshed gear, the intermediate shaft low-speed gear is meshed with the main bevel shaft low-speed gear, the main bevel shaft assembly is connected with the shaft assembly through a sliding meshing sleeve, and the driving bevel gear is meshed with a driven bevel gear of the differential assembly. The AMT is less in gear, and the system cost is reduced while the dynamic property is considered.

However, the assembly of the above patent has large volume, complex structure, heavy weight and low integration level; the Grarison bevel gear is complex to manufacture and process, the processing precision is difficult to guarantee, and the cost is high.

Also such as: chinese patent, publication No. CN104295675A, published japanese 2015.01.21, discloses a two-gear transmission assembly for an electric vehicle, in which an input shaft and an intermediate shaft are installed in an inner cavity formed after a left box body and a right box body are combined, the input shaft is connected with an output shaft of a motor, a first gear on the intermediate shaft is normally engaged with a first gear shaft tooth part of the input shaft, and a second gear is normally engaged with a second gear shaft tooth part; a synchronizer gear sleeve is sleeved on the intermediate shaft between the first gear and the second gear and can axially slide along the intermediate shaft under the shifting of a shifting fork; the speed reducing gear part of the intermediate shaft is normally meshed with the speed reducing gear on the speed reducer shell, the planetary gear shafts are fixed on the speed reducer shell, two planetary gears on the planetary gear shafts are normally meshed with two output bevel gears simultaneously, and bevel gear shafts of the two output bevel gears are supported in mounting holes at the left end and the right end of the speed reducer shell respectively. The invention can output the power of the motor through the bevel gear shaft of the output bevel gear, and can enable the bevel gear shaft to have two gears through shifting gears, thus being well suitable for road conditions. Chinese patent, publication No. CN205118187U, bulletin date 2016.03.30 discloses an electric freight car speed reducer, which belongs to the field of speed changers, and the structure thereof includes a left shell and a right shell, the left shell and the right shell are correspondingly buckled into a speed reducer shell, an input shaft is installed on the upper portion in the left shell and the right shell, the input end of the input shaft is connected with a connecting disc on the outer side of the right shell, an intermediate shaft is installed below the input shaft, and a differential assembly is installed below the intermediate shaft. The utility model discloses an electric truck reduction gear compares with prior art, has solved current electric truck reduction gear ubiquitous bearing capacity and has low, the big scheduling problem of noise, has characteristics such as reasonable in design, compact structure, noise are low, bearing capacity is big.

Although the two patents have simple structures, the transmission efficiency and the integration level are all to be improved.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a double-motor transverse shiftable electrically-driven bridge reducer assembly which is compact in structure, high in integration level, low in processing difficulty and light in weight.

In order to achieve the purpose, the invention designs a double-motor transverse shiftable electrically-driven bridge reducer assembly, which is characterized in that: the gear shifting device comprises two motors, two gear shifting assemblies, a planetary reduction gear assembly and a differential assembly; each motor is independently connected with the planetary reduction gear assembly through a gear shifting assembly; each gear shifting assembly works independently and comprises a first shaft assembly and a second shaft assembly, and the high-speed and low-speed two-gear speed regulation of the first shaft assembly and the second shaft assembly is realized independently through a sliding engagement component on the first shaft assembly; each two-shaft assembly is in transmission with a sun gear shaft of the planetary reduction gear assembly through a long meshing gear set; the planet carrier of the planetary reduction gear assembly is connected with the differential inner shell of the differential assembly through a planet shaft, and the gear ring is connected with the differential shell.

Preferably, the gear shifting assembly and the long meshing gear set are positioned in a first space enclosed by a left transmission shell and a right transmission shell; the planetary reduction gear assembly is positioned in a second space enclosed by the differential shell and the transmission left shell; one end of the sun wheel shaft is positioned in the first space, and the other end of the sun wheel shaft is positioned in the second space.

Preferably, the two shifting assemblies are arranged symmetrically. The input power of the two motors can be adjusted by the control system according to different working conditions; and the balance of the whole vehicle weight is facilitated.

Preferably, the shaft assembly includes a shaft, a shaft high-speed gear driving gear, a shaft low-speed gear driving gear, and the sliding engagement assembly includes: a sliding meshing sleeve and a fixed tooth holder; the two-shaft assembly comprises a two-gear shaft, a two-shaft high-speed driven gear and a two-shaft low-speed driven gear; the first-shaft high-speed driving gear is meshed with the second-shaft high-speed driven gear, and the first-shaft low-speed driving gear is meshed with the second-shaft low-speed driven gear; the sliding engagement assembly is located between a first high gear drive gear and a first low gear drive gear.

Preferably, the first shaft high-speed gear driving gear and the first shaft low-speed gear driving gear are connected with a first shaft needle bearing.

Further preferably, the fixed tooth holder is fixed with a shaft spline, and the sliding meshing sleeve is in spline connection with the fixed tooth holder.

Further preferably, the two-shaft high-speed driven gear and the two-shaft low-speed driven gear are in interference fit with the gear shaft. The interference fit is realized through the cold pressing process, the requirement of power transmission can be met, the structure is simplified, and the cost is saved.

Preferably, the long meshing gear set comprises a cylindrical gear arranged on the two-shaft assembly and a secondary speed reduction driven gear arranged on the sun gear shaft, and the cylindrical gear and the secondary speed reduction driven gear are in constant meshing.

Further preferably, the two-shaft assembly comprises two shafts, and the cylindrical gear and the two shafts are of an integral structure. Therefore, the two shafts are designed into gear shafts, the structure is simplified while the requirement of power transmission is met, and the cost is saved.

Further preferably, the secondary reduction driven gear is in interference fit with the sun gear shaft.

Still further preferably, the two-stage reduction driven gear is connected with the transmission left shell and the transmission right shell through conical bearings.

The invention has the beneficial effects that: including two gears of high-speed gear and low-speed gear, can realize the gear shift, its power transmission route: in high-speed gear, the torque of the motor is input through a first shaft spline, and finally is output to a half shaft and a wheel end through an internal spline of a differential gear through a sliding meshing sleeve, a fixed gear seat, a first-stage high-speed driving gear of a first shaft assembly, a first-stage high-speed driven gear of a second shaft assembly, a second-stage driving gear of the second shaft assembly, a central driven gear, a second-shaft central planetary reduction gear and the differential gear. In low-speed gear, the torque of the motor is input through a first shaft spline, passes through a sliding meshing sleeve, a fixed gear seat, a first-stage low-speed driving gear of a first shaft assembly, a first-stage low-speed driven gear of a second shaft assembly, a second-stage driving gear of the second shaft assembly, a central driven gear, a second-shaft central planetary reduction gear and a differential gear, and finally is output to a half shaft and a wheel end through an internal spline of the differential gear.

The invention adopts the advantages and characteristics that the double motors are arranged in the front and back, and the double motors are arranged in the front and back:

1. the two small motors can meet the power and torque requirements of one large motor, and the arrangement space of the central speed reducer is effectively saved; 2. the front and rear double motors on the axle housing are arranged, so that the gravity center offset of the axle assembly can be reduced, and the possibility of breakage between the main speed reducer shell and the axle housing caused by vibration of the motors in work is ensured; 3. under the torque mode and the rotating speed mode, the power and the torque are reasonably distributed through the adjustment of the controller, so that the front motor and the rear motor are guaranteed to operate in an economic area to the maximum extent, the working efficiency is improved, the electric energy is saved, and the service life of a battery is prolonged.

The invention has compact structure, high integration level, low processing difficulty and light weight.

Drawings

FIG. 1 is a schematic structural view of the present invention

FIG. 2 is a schematic representation of the high speed power transmission of the present invention

FIG. 3 is a low gear power transmission schematic of the present invention

In the figure: the device comprises a first shaft assembly 1, a second shaft assembly 2, a planetary gear reduction assembly 3, a differential assembly 4, a first shaft 5, a high-speed gear driving gear 6, a low-speed gear 7, a sliding meshing sleeve 8, a fixed gear seat 9, a two-gear wheel shaft 10, a high-speed driven gear 11, a low-speed driven gear 12, a second-stage reduction driven gear 13, a planetary reduction gear set 14, a sun wheel shaft 15, a planetary wheel 16, a planetary carrier 17, a gear ring 18, a transmission left shell 19, a transmission right shell 20, a differential shell 21, a left half shaft pipe 22, a right half shaft pipe 23 and a differential inner shell 24.

Detailed Description

The technical solutions of the present invention (including the preferred ones) are further described in detail by way of fig. 1 to 3 and enumerating some alternative embodiments of the present invention. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.

As shown in fig. 1 to 3, the dual-motor transverse shiftable electric drive axle reducer assembly designed by the invention comprises two motors, two gear shifting assemblies, a planetary gear reduction assembly 3, a differential assembly 4, a transmission left shell 19 and a transmission right shell 20; each gear shifting assembly comprises a first shaft assembly 1 and a second shaft assembly 2; the first shaft assembly 1 comprises a first shaft 5, a high-speed gear driving gear 6, a low-speed gear 7, a sliding meshing sleeve 8 and a fixed gear seat 9; the two-shaft assembly 2 comprises a two-gear shaft 10, a high-speed driven gear 11 and a low-speed driven gear 12; the planetary reduction gear assembly 3 comprises a secondary reduction driven gear 13 and a planetary reduction gear set 14; the planetary reduction gear set 14 includes a sun gear shaft 15, planetary gears 16, a planet carrier 17, and a ring gear 18; the differential assembly 4 includes a differential case 21, a left axle tube 22, a right axle tube 23, and a differential inner case 24. The cylindrical gear arranged on the two-shaft assembly 2 and the two-stage reduction driven gear 13 arranged on the sun gear shaft 15 are in constant mesh to form a constant mesh gear set, the cylindrical gear and the two shafts are of an integral structure, and only one earphone reduction driven gear 13 is arranged.

Preferably, the two shifting assemblies are arranged symmetrically. The input power of the two motors can be adjusted by the control system according to different working conditions; and the balance of the whole vehicle weight is facilitated. Each motor is independently connected with the planetary gear assembly 3 through a gear shifting assembly.

The first shaft assembly 1, the second shaft assembly 2 and the long meshing gear set are positioned in a first space enclosed by a transmission left shell 19 and a transmission right shell 20; the planetary reduction gear assembly 3 is positioned in a second space enclosed by the differential case 21 and the transmission left case 19; the sun gear shaft 15 has one end located in the first space and the other end located in the second space.

The motor is connected with a shaft assembly 1, a high-speed driving gear 6 is meshed with a high-speed driven gear 11, and the high-speed driving gear 6 is connected with a shaft 5 through a needle bearing; the low-gear driving gear 7 is engaged with the low-gear driven gear 12, and the low-gear driving gear 7 is connected with a shaft 5 through a needle bearing.

The sliding meshing sleeve 8 and the fixed tooth holder 9 form a sliding meshing assembly, and the fixed tooth holder 9 and the shaft 5 are fixed through splines; the sliding meshing sleeve 8 is connected with the fixed tooth holder 9 through a spline; the sliding meshing sleeve 8 slides rightwards, the first-shaft high-speed driving gear 6 is connected with the first shaft 5, the sliding meshing sleeve slides rightwards, and the first-shaft low-speed driving gear 7 is connected with the first shaft 5.

The high-speed driven gear 11 and the two-gear shaft assembly 2 adopt a cold pressing process to ensure interference fit; the low-speed driven gear 12 and the two-gear shaft assembly 2 adopt a cold pressing process to ensure interference fit; the cylindrical gear processed on the gear shaft 10 is meshed with a secondary speed reduction driven gear 13 of the planetary gear speed reduction assembly 3, the secondary speed reduction driven gear 13 is in interference fit with a sun gear shaft 15 of the planetary gear speed reduction assembly 3 through a cold pressing process, and the secondary speed reduction driven gear 13 is connected with a transmission left shell 19 and a transmission right shell 20 through conical bearings.

The planet gears 16 are connected with the planet carrier 17 through planet shafts, the planet carrier 17 is connected with the differential inner shell 24 through the planet shafts, and the ring gear 18 is connected with the differential shell 21 through bolts.

The transmission left shell 19 is connected with the differential shell 21 through bolts, the left half-shaft tube 22 is connected with the differential shell 21 through bolts, the transmission right shell 20 is connected with the right half-shaft tube 23 through bolts, and the transmission right shell 19 is connected with the speed reduction right shell 20 through bolts.

High gear power transmission is shown in fig. 2: the sliding meshing sleeve 8 slides rightwards, and the power path is as follows:

the motor-a shaft 5-a high-speed gear driving gear 6-a high-speed gear driven gear 11-a two-gear shaft 10-a secondary reduction driven gear 13-a sun gear shaft 15-a planet carrier 17-a differential mechanism inner shell 24-a half shaft gear-a half shaft.

Low gear power transfer is shown in FIG. 3: the sliding engagement sleeve 8 slides leftwards, and the force path is as follows:

the motor-a shaft 5-a low-gear driving gear 7-a low-gear driven gear 12-a gear shaft 10-a secondary reduction driven gear 13-a sun gear shaft 15-a planet carrier 17-a differential mechanism inner shell 24-a half shaft gear-a half shaft.

A shaft 5, a gear shaft 10, a sun gear shaft 15 and a half shaft are arranged in parallel.

It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and any modification, combination, replacement, or improvement made within the spirit and principle of the present invention is included in the scope of the present invention.