CN106515469B

CN106515469B - Integrated structure of electric automobile range extender system

Info

Publication number: CN106515469B
Application number: CN201611014611.7A
Authority: CN
Inventors: 李璞; 毕帅; 王经常; 王金桥; 徐忠四
Original assignee: Chery Automobile Co Ltd
Current assignee: Chery Automobile Co Ltd
Priority date: 2016-11-18
Filing date: 2016-11-18
Publication date: 2020-04-07
Anticipated expiration: 2036-11-18
Also published as: CN106515469A

Abstract

The invention discloses an integrated structure of an electric automobile range extender system, which comprises a generator, an engine, a connecting shell and a coupler, wherein the engine is connected with the generator through the coupler, one end of a driving claw of the coupler is provided with a flange plate, the driving claw is fixed on a power output flywheel of the engine through a connecting bolt, a driven claw of the coupler is matched with an external spline of an input shaft of the generator through an internal spline, the driving claw is connected with the driven claw, and the generator is connected with the engine through the connecting shell. The integrated structure of the invention is convenient to install, and the elastic element can bear instant impact load, avoid rigid impact, play the role of overload protection and ensure stable and reliable fixation.

Description

Integrated structure of electric automobile range extender system

Technical Field

The invention relates to the field of electric automobiles, in particular to a mechanical integrated structure of a range extender system of a range-extended electric automobile.

Background

Under the guidance of national policies, pure electric vehicles are rapidly developed and occupy a certain market, but the driving range is still a great obstacle to large-scale implementation of the technical strategy of the pure electric vehicles due to the restriction of the level of power batteries, and customers still worry about the range problem even though purchasing the pure electric vehicles, so that the daily activity range is limited.

The range extender system on the range-extended electric vehicle is only used for generating electricity, and the driving of the whole vehicle depends on a driving motor. The actuating system of whole car includes driving motor and machine controller, and the range extender system includes: the generator comprises an engine, a generator, a connecting flange and a quincunx elastic coupling.

Whether the mechanical integration mode of the range extender system is proper or not is important to the service life, NVH performance, reliability and durability of the whole range extender system. If a rigid connection is adopted, the range extender system has very poor capability of bearing impact load and alternating load, the requirement on coaxiality is very high, and if the machining precision is insufficient and the coaxiality error is slightly large, the shaft breakage condition is easily caused when two axes are offset relatively.

Disclosure of Invention

The invention aims to solve the technical problem of realizing an integrated structure of an electric automobile range extender system which is stable and reliable in fixation and convenient to produce and install.

In order to achieve the purpose, the invention adopts the technical scheme that: the electric automobile increases journey ware system's integrated configuration, electric automobile increases journey ware system includes generator, engine, connection casing and shaft coupling, the engine passes through the coupling joint with the generator, the one end of shaft coupling initiative claw is equipped with the ring flange, fixes the initiative claw on engine power output flywheel through connecting bolt, the driven claw of shaft coupling passes through the external splines phase-match of internal spline and generator input shaft, the initiative claw is connected with the driven claw, be connected through connecting the casing between generator and the engine.

The driving claw is connected with the driven claw through an elastic element.

The elastic element is of a columnar structure, and the driving claw and the driven claw are fixed on different sides of the outer wall of the elastic element.

The coupler is located in the connecting shell, the end of the engine of the connecting shell is fixed with the rear end face of the cylinder body through the fixing bolt, and the end of the generator of the connecting shell is connected with the front end face of the generator through the fixing bolt.

The engine end of the connecting shell and the rear end face of the cylinder body are positioned through a positioning pin.

And a boss for axial positioning is arranged between the end of the generator of the connecting shell and the front end face of the generator.

And a boss for axial positioning is arranged on the external spline of the generator input shaft.

The integrated structure of the invention is convenient to install, and the elastic element can bear instant impact load, avoid rigid impact, play the role of overload protection and ensure stable and reliable fixation.

Drawings

The following is a brief description of the contents of each figure and the symbols in the figures in the description of the invention:

FIG. 1 is a schematic diagram of an integrated structure of an electric vehicle range extender system;

FIG. 2 is a sectional view of an integrated structure of an electric vehicle range extender system;

FIG. 3 is an external view of the engine, generator and connecting housing;

fig. 4 is an external view of the engine, the generator and the quincunx elastic coupling.

The labels in the above figures are: 1. an engine; 2. a generator; 3. a coupling; 4. connecting the shell; 11. positioning pins; 12. a flywheel; 13. the rear end surface of the cylinder body; 21. an external spline; 22. a front end face; 23. an input shaft; 31. a driving claw; 32. a driven claw; 33. an elastic element; 34. a connecting bolt; 35. an internal spline; 41. and (5) fixing the bolt.

Detailed Description

The integrated structure of the electric automobile range extender system comprises an engine 1, a generator 2, a coupler 3 and a connecting shell 4, wherein the engine 1 is connected with the generator 2 through the coupler 3, the quincunx elastic coupler 3 is redesigned according to matching requirements and consists of two half couplers with convex claws and different shapes and an elastic element 33, and the elastic element 33 is arranged between the convex claws of the two half couplers so as to realize the connection of the two half couplers.

Specifically, the elastic coupling 3 is composed of a driving claw 31, a driven claw 32 and an elastic element 33, the driving claw 31 of the elastic coupling 3 is connected with the power output flywheel 12 of the engine 1 through a connecting bolt 34 in a flange plate mode, a boss is designed on the flange plate structure, a groove is formed in the end face of the flywheel so as to perform axial positioning, an internal spline 35 is designed in the driven claw 32 of the elastic coupling 3, an external spline 21 matched with the input shaft 23 of the generator 2 is designed in the input shaft 23 of the generator 2, the external spline 21 of the generator 2 is inserted into the internal spline 35 of the driven claw 32 of the elastic coupling 3 so as to form connection of the internal spline 21 and the external spline 21, and axial positioning is.

The whole elastic coupling 3 is contained in the connecting shell 4, and the engine 1 end of the connecting shell 4 is connected with the rear end surface 13 of the cylinder body by adopting a fixing bolt 41 and is positioned by a positioning pin 11. The end of the connecting shell 4, which is connected with the generator 2, is connected with the front end face 22 of the generator 2 by a fixing bolt 41, and the axial positioning is carried out through a lug boss. The engine 1 and the generator 2 are rigidly connected by the connecting shell 44, so that the stability of the whole range extender system can be ensured, and the coaxiality precision of the engine 1, the generator 2 and the elastic coupling 3 is improved. The power transmission adopts the elastic coupling 3 to connect, the elastic coupling 3 is a coupling 3 with good vibration damping and buffering performance, the working is stable and reliable, the structure is simple, the radial size is small, the weight is light, the rotational inertia is small, the axial, radial and angular compensation capabilities are large, the high-strength polyurethane elastic element 33 is wear-resistant and oil-resistant, the bearing capacity is large, the service life is long, the safety and reliability are realized, the lubrication is not needed, the maintenance workload is small, and the continuous long-term operation is realized.

When the range extender is assembled, the elastic coupling 3 is assembled with the engine 1, the connecting shell 4 and the generator 2, and the positioning pin 11 can ensure the assembly precision. The whole system has the advantages of few and simple integrated parts and convenient assembly and disassembly, and overcomes the defects of difficult assembly and complex structure. When the two axes have relative deviation, the elastic element 33 generates corresponding elastic deformation to play a role of automatic compensation, and the service life, NVH, durability and reliability of the whole system of the range extender can be effectively improved.

When the range extender structure normally works, the power of a power source engine 1 is transmitted to a driving claw 31 of an elastic coupling 3 through a flywheel 12, then the power is transmitted to a driven claw 32 of the elastic coupling 3 through a middle elastic element 33, the driven claw 32 transmits the power to a generator 2 through the connection of an internal spline and an external spline 21, the elastic element 33 is of a columnar structure, the driving claw 31 and the driven claw 32 are both fixed on different sides of the outer wall of the elastic element 33, so when the driving claw 31 and the driven claw 32 rotate relatively, the elastic element 33 can deform to reduce impact, when a finished vehicle VCU sends a signal to require the power torque output by the generator 2 to be improved, the elastic element 33 can bear instantaneous impact load, rigid impact is avoided, and an overload protection effect is achieved.

The integrated structure of the range extender system of the electric vehicle can cause torque sudden change due to the change of the working condition point of the range extender, so that the driven claw 32 does not adopt flat key connection but adopts a spline connection mode to transmit power to the generator 2. The quincunx elastic coupling 3 is widely used in a reducer for transmitting power and reducing speed with a motor as a power source, while the generator 2 serves as a driven member and the engine 1 serves as a power source to transmit power coaxially at the same speed in the present structure. By adopting the structure, system components can be reduced, and the integration complexity is reduced. When the two axes have relative deviation, the elastic element 33 generates corresponding elastic deformation to play the role of automatic compensation. Compared with rigid connection, the connection mode can play a role in buffering and damping, prevents the shaft from generating torsional deformation and fracture due to instantaneous torsional stress, can bear impact load and alternating load, and improves the service life, NVH (noise vibration harshness), durability and reliability of the range extender system.

The invention has been described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the specific implementation in the above-described manner, and it is within the scope of the invention to apply the inventive concept and solution to other applications without substantial modification.

Claims

1. Electric automobile increases integrated structure of journey ware system, electric automobile increases journey ware system includes generator, engine, connection casing and shaft coupling, the engine passes through the coupling joint with the generator, its characterized in that: one end of the driving claw of the coupler is provided with a flange plate, the driving claw is fixed on a power output flywheel of the engine through a connecting bolt, a driven claw of the coupler is matched with an external spline of an input shaft of the generator through an internal spline, the driving claw is connected with the driven claw, and the generator is connected with the engine through a connecting shell;

the driving claw is connected with the driven claw through an elastic element;

the elastic element is of a columnar structure, and the driving claw and the driven claw are fixed on different sides of the outer wall of the elastic element;

the coupler is positioned in the connecting shell, the end of the engine of the connecting shell is fixed with the rear end face of the cylinder body by using a fixing bolt, and the end of the generator of the connecting shell is connected with the front end face of the generator by using a fixing bolt;

the engine end of the connecting shell and the rear end face of the cylinder body are positioned by a positioning pin;

a boss for axial positioning is arranged between the end of the connecting shell generator and the front end face of the generator;