CN217415443U

CN217415443U - Double-motor direct-drive reduction gearbox for running vehicle

Info

Publication number: CN217415443U
Application number: CN202220715688.1U
Authority: CN
Inventors: 赵铁栓; 殷楠; 韩长太
Original assignee: Xi'an Huixin Transmission Control Co ltd
Current assignee: Xi'an Huixin Transmission Control Co ltd
Priority date: 2022-03-30
Filing date: 2022-03-30
Publication date: 2022-09-13
Anticipated expiration: 2032-03-30

Abstract

The utility model discloses a two motors of vehicle that traveles directly drive reducing gear box, constitute including output assembly and drive assembly, drive assembly sets up the both sides at output assembly: the transmission assembly comprises a first permanent magnet synchronous motor and a second permanent magnet synchronous motor, wherein a first input shaft and a second input shaft are respectively installed on the output ends of the first permanent magnet synchronous motor and the second permanent magnet synchronous motor, and a first input gear and a second input gear are respectively sleeved on the surfaces of the first input shaft and the second input shaft and are limited and fixed through flat keys; the electric control technology is used for controlling the rotating speeds of the two motors to realize power coupling output and rotating speed coupling output, complex structures such as clutches and synchronizers in the existing reduction gearbox are eliminated, and the fixed shaft type gearbox is adopted, so that the structure is simpler than that of the existing gearbox, the number of parts is less, the cost is lower, and the reliability is obviously improved.

Description

Double-motor direct-drive reduction gearbox for running vehicle

Technical Field

The utility model belongs to the technical field of the electric drive, concretely relates to two motors of vehicle that traveles directly drive reducing gear box.

Background

At present, pure electric vehicles, especially engineering vehicles, develop reduction boxes which are matched with a double-motor driving system more simply to meet the requirements of the whole vehicle on power economy and meet the requirements of complex working conditions. However, the space of the chassis is limited, the arrangement of the double motors and the scheme of the reduction gearbox are too complex at present, the cost is high, the manufacturability is complex, and the reliability is unstable.

Patent number CN109455075A proposes a reduction gearbox with a one-way clutch for dual motors, which increases the complexity of the system, increases the cost, increases the control difficulty, and relatively reduces the reliability; CN106949203A proposes a double-motor planetary reduction gearbox with a one-way clutch, which makes the assembly and manufacturing process more complicated, the cost higher, and the planetary failure rate higher than that of a fixed-axis gearbox; CN207360088U provides a dead axle box with synchronizers equipped with two motors, the arrangement of the different sides of the two motors is not favorable for the utilization of the chassis space, and the gear box shifts gears for the two-gear three-shaft synchronizers, the number of parts is significantly increased and complicated, and the defects of impact or pause and contusion can also be generated in the shifting process.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a two motors of vehicle that traveles directly drive reducing gear box to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a two motors of vehicle that traveles directly drive reducing gear box, includes that output assembly and drive assembly constitute, drive assembly sets up in output assembly's both sides:

the transmission assembly comprises a first permanent magnet synchronous motor and a second permanent magnet synchronous motor, a first input shaft and a second input shaft are respectively arranged on the output ends of the first permanent magnet synchronous motor and the second permanent magnet synchronous motor, and a first input gear and a second input gear are respectively sleeved on the surfaces of the first input shaft and the second input shaft and are limited and fixed through a flat key;

the output assembly comprises an output gear in meshing transmission with the first input shaft and the second input gear, and an output shaft penetrates through and is fixed at the circle center of the output gear.

Preferably, the transmission device further comprises a reduction gearbox, the first input gear, the output gear and the second input gear are all located inside the reduction gearbox, and two ends of the output shaft extend through to the outside of the reduction gearbox.

Preferably, a bearing is sleeved at the joint position of the output shaft and the reduction gearbox.

Preferably, the reduction gearbox is provided with two reduction gearboxes, and the two reduction gearboxes are fixed through bolts.

Compared with the prior art, the beneficial effects of the utility model are that:

the power coupling output and the rotating speed coupling output are realized by controlling the rotating speed of the two motors through an electric control technology, meanwhile, complex structures such as a clutch, a synchronizer and the like in the existing reduction gearbox are eliminated, and a fixed shaft type gearbox is adopted, so that the structure is simpler than that of the existing gearbox, the number of parts is less, the cost is lower, the reliability is obviously improved, the gear box in the utility model is a one-level deceleration structure, gear shifting is not needed in the using process, the problems of pause and impact and inevitable power interruption when the gear box with multiple gears is shifted in the prior art are solved, and need not dispose the derailleur controller alone like power gearbox of shifting gears, make the cost greatly reduced of whole automatically controlled unit, two motors adopt PMSM, and the superimposed high-efficient area of system is wider, improves the electric energy utilization ratio of system, improves continuation of the journey mileage, reduces charging frequency, improves economic benefits.

Drawings

Fig. 1 is a schematic structural view of the first permanent magnet synchronous motor and the second permanent magnet synchronous motor in the same side of the present invention;

fig. 2 is the structure diagram of the first permanent magnet synchronous motor and the second permanent magnet synchronous motor in different sides.

In the figure: 1. a first permanent magnet synchronous motor; 2. a reduction gearbox; 3. a first input shaft; 4. a first input gear; 5. an output shaft; 6. an output gear; 7. a second input shaft; 8. a second input gear; 9. and a second permanent magnet synchronous motor.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

Referring to fig. 1, the present invention provides a technical solution: the utility model provides a two motors of vehicle that traveles directly drive reducing gear box, includes that output assembly and drive assembly constitute, drive assembly sets up in output assembly's both sides:

the transmission assembly comprises a first permanent magnet synchronous motor 1 and a second permanent magnet synchronous motor 9, a first input shaft 3 and a second input shaft 7 are respectively installed on the output ends of the first permanent magnet synchronous motor 1 and the second permanent magnet synchronous motor 9, and a first input gear 4 and a second input gear 8 are respectively sleeved on the surfaces of the first input shaft 3 and the second input shaft 7 and are limited and fixed through flat keys;

the output assembly comprises an output gear 6 in meshing transmission with the first input shaft 3 and the second input gear 8, and an output shaft 5 penetrates through and is fixed at the circle center of the output gear 6.

In the embodiment, the gearbox 2 is preferably further provided with a reduction gearbox 2, the gearbox 2 is of a one-stage reduction structure, gear shifting is not needed in the using process, the problems of jerk and impact and inevitable power interruption in the process of gear shifting of a multi-gear gearbox in the prior art are solved, and a transmission controller does not need to be configured independently like a power shifting transmission case, so that the cost of the whole electric control unit is greatly reduced, the two motors adopt permanent magnet synchronous motors, the superposed high-efficiency area of the system is wider, the electric energy utilization rate of the system is improved, the endurance mileage is improved, the charging frequency is reduced, the economic benefit is improved, the first input gear 4, the output gear 6 and the second input gear 8 are all positioned inside the reduction box 2, two ends of the output shaft 5 extend to penetrate through the outside of the reduction box 2, wherein the first permanent magnet synchronous motor 1 and the second permanent magnet synchronous motor 9 are arranged at the same side of the reduction gearbox 2.

In this embodiment, preferably, a bearing is sleeved at a position where the output shaft 5 and the reduction gear box 2 are connected.

In this embodiment, preferably, two reduction gearboxes 2 are provided, and the two reduction gearboxes 2 are fixed by bolts.

Example 2

Referring to fig. 2, in the present embodiment, it is preferable that the transmission case 2 further includes a reduction box 2, the transmission case 2 is a one-stage reduction structure, and no gear shifting is required during the use process, so as to solve the problems of jerk and impact and inevitable power interruption during gear shifting of the multi-gear transmission case in the prior art, and a transmission controller does not need to be configured independently like a power shifting transmission case, so that the cost of the whole electric control unit is greatly reduced, the two motors adopt permanent magnet synchronous motors, the superposed high-efficiency area of the system is wider, the electric energy utilization rate of the system is improved, the endurance mileage is improved, the charging frequency is reduced, the economic benefit is improved, the first input gear 4, the output gear 6 and the second input gear 8 are all positioned inside the reduction box 2, two ends of the output shaft 5 extend to penetrate through the outside of the reduction box 2, wherein the first permanent magnet synchronous motor 1 and the second permanent magnet synchronous motor 9 are arranged on different sides of the reduction box 2.

The utility model discloses a theory of operation and use flow: when the utility model is used, different working modes are realized through an intelligent control program, the first permanent magnet synchronous motor 1 and the second permanent magnet synchronous motor 9 are arranged in parallel at the same side or different sides of the reduction gearbox 2, the on-off of the internal current of the first permanent magnet synchronous motor 1 and the second permanent magnet synchronous motor 9 is controlled through the controller, the starting and the stopping of the motors are realized, the requirements of the current complete machine on the power performance of low-speed heavy load and the working condition requirement of high-speed no-load transportation are met through different choices of the motors, the reduction gearbox 2 has a simplified structure, is a structure with a constant meshing structure of the first input gear 4, the second input gear 8 and the output gear 6, no clutch, no complex structures such as a shifting sliding sleeve and the like, the axial size is obviously reduced, the maintenance difficulty is greatly reduced, wherein the speed ratio range of the first input gear 4 and the output gear 6 is between 2 and 5, the speed ratio range of the second input gear 8 and the output gear 6 is 1.5-5; the power coupling and the speed coupling are realized by detecting in real time and adjusting the rotating speeds of the two motors in time through a controller detection system.

During low-speed light-load or no-load high-speed transition: the first permanent magnet synchronous motor 1 is enabled to run and the second permanent magnet synchronous motor 9 is disabled under the control of the controller, power is transmitted to the first input gear 4 through the first input shaft 3, transmitted to the output gear 6 through the first input gear 4 and transmitted to the output shaft 5 through the output gear 6, and then transmitted to the front axle and the rear axle;

low-speed high-torque state: when the rotating speed of the motor is reduced and the current is increased, the system judges that the external load is increased, so that the second permanent magnet synchronous motor 9 is automatically started, one path of power is transmitted from the first permanent magnet synchronous motor 1 to the first input shaft 3, the first input shaft 3 is transmitted to the first input gear 4, the first input gear 4 is transmitted to the output gear 6, the other path of power is transmitted to the second input shaft 7 through the second permanent magnet synchronous motor 9, is transmitted to the second input gear 8 through the second input shaft 7, is transmitted to the output gear 6 through the second input gear 8, and is transmitted to the output shaft 5 after being coupled at the output gear 6, so that the output of the power is realized.

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.

Claims

1. The utility model provides a two motors of vehicle that traveles directly drive reducing gear box which characterized in that: constitute including output assembly and transmission assembly, transmission assembly sets up in output assembly's both sides:

the transmission assembly comprises a first permanent magnet synchronous motor (1) and a second permanent magnet synchronous motor (9), the output ends of the first permanent magnet synchronous motor (1) and the second permanent magnet synchronous motor (9) are respectively provided with a first input shaft (3) and a second input shaft (7), the surfaces of the first input shaft (3) and the second input shaft (7) are respectively sleeved with a first input gear (4) and a second input gear (8) and are limited and fixed through a flat key;

the output assembly comprises an output gear (6) in meshing transmission with the first input shaft (3) and the second input gear (8), and an output shaft (5) penetrates through and is fixed to the circle center of the output gear (6).

2. The double-motor direct-drive reduction gearbox of the running vehicle as claimed in claim 1, wherein: the transmission mechanism is characterized by further comprising a reduction gearbox (2), the first input gear (4), the output gear (6) and the second input gear (8) are all located inside the reduction gearbox (2), and two ends of the output shaft (5) extend through to the outside of the reduction gearbox (2).

3. The double-motor direct-drive reduction gearbox of the running vehicle as claimed in claim 2, characterized in that: and a bearing is sleeved at the joint position of the output shaft (5) and the reduction gearbox (2).

4. The double-motor direct-drive reduction gearbox for the running vehicle as claimed in claim 1, characterized in that: the two reduction boxes (2) are fixed through bolts.