CN217388458U

CN217388458U - Range extender structure and new energy vehicle comprising same

Info

Publication number: CN217388458U
Application number: CN202221081389.3U
Authority: CN
Inventors: 张兴林; 司文·斯泰因瓦舍尔; 姜旭义
Original assignee: Getec Vehicle Technology Suzhou Co ltd
Current assignee: Getec Vehicle Technology Suzhou Co ltd
Priority date: 2022-04-28
Filing date: 2022-04-28
Publication date: 2022-09-06
Anticipated expiration: 2032-04-28

Abstract

The utility model discloses a extend journey ware structure and contain this new forms of energy vehicle that increases journey ware structure. The range extender configuration includes an engine, a generator, and a generator controller. The engine has a crankshaft. The generator is provided with a rotor, a rotor support and a stator, the rotor support is arranged in the rotor, a rotor shaft is arranged on the rotor support, the rotor shaft is directly connected with the crankshaft, and the stator is connected with the engine through a stator shell. Wherein the generator has no front housing, the stator housing surrounding the stator in a radial direction of the generator. According to the utility model discloses an increase journey ware structure owing to left out motor procapsid, motor bearing, flywheel and bumper shock absorber, consequently can reduce greatly and increase journey ware's axial dimension, and make the rotor be close to the engine end as far as possible through the spider structure and just can realize replacing the effect of flywheel and bumper shock absorber.

Description

Range extender structure and new energy vehicle comprising same

Technical Field

The utility model relates to a new energy automobile field specifically is about an increase journey ware structure.

Background

Along with the increase of national requirements on energy conservation and emission reduction of carbon neutralization, two routes are mainly used for energy conservation and emission reduction of vehicles at present, wherein one route is a pure electric scheme, and the other route is a hybrid scheme. Since many vehicles, especially long-distance transport vehicles and engineering vehicles, have high endurance and power requirements, and the cost of using a pure electric scheme is excessive and the time cost is also high, the hybrid scheme at the present stage is a preferable scheme for many vehicles.

The extended range electric vehicle has some differences from the conventional hybrid electric vehicle. Although the extended range electric vehicle also has an engine, the engine does not directly drive the vehicle in a normal condition, and only drives the generator to generate electricity. The electric power generated by the generator is directly supplied to the motor, and the surplus electric power can be supplied to the battery for charging, so that the vehicle can be driven to move by the motor.

Most of the existing range extender structures connect an engine and a generator to operate through a torsional damper, and the generator structure is similar to a driving motor structure and is provided with a motor shaft which is supported by two bearings. The engine needs to keep a starter, a flywheel, a gear ring component and a flywheel shell, and a torsional damper needs to be added when the starter, the flywheel, the gear ring component and the flywheel shell are connected, so that the axial length of the whole system assembly is longer, the weight is heavier and parts are more.

Patent CN 215498484U discloses a direct connection structure of an engine and a generator, which directly connects an engine output shaft with a rotor support of the generator. However, in this construction there is still a front housing of the electric machine, in which the rotor support of the generator is arranged and into which the engine crankshaft projects. This arrangement allows the axial length of the entire range extender to remain large due to the presence of the front housing. Due to the fact that the axial length is large, the rotor support cannot play a role of an engine flywheel, and therefore NVH performance of the engine is not ideal. And the generator controller cannot be axially integrated because the presence of the front housing occupies a large space.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an increase journey ware structure, it can reduce the axial length who increases journey ware mechanism greatly.

In order to achieve the above object, the utility model provides a range extender structure, including engine and generator. The engine has a crankshaft, and the generator has a rotor, a rotor support disposed within the rotor, and a stator. And the rotor support is provided with a rotor shaft, the rotor shaft is directly connected with the crankshaft, and the stator is connected with the engine through a stator shell. Wherein the generator has no front housing, the stator housing surrounding the stator in a radial direction of the generator

In one or more embodiments, the range extender configuration further comprises a generator controller directly connected to the rear end of the generator.

In one or more embodiments, the rotor shaft is directly connected to the crankshaft via a flange.

In one or more embodiments, the crankshaft has internal threads thereon, and the rotor shaft has external threads thereon, and the rotor shaft is inserted into the crankshaft and directly coupled thereto by a threaded connection.

Another aspect of the utility model provides a new energy vehicle, it includes as above increases journey ware structure.

Compared with the prior art, according to the utility model discloses a range extender structure, the advantage that has as follows:

1. because the front shell of the generator is omitted, the rotor support of the generator is closer to the end of the engine, so that the rotor support can play the role of a flywheel to the maximum extent, and a motor bearing and a shock absorber are not needed any more.

2. The engine rotor shaft is directly connected with the crankshaft, and the stator is directly connected with the engine through the stator shell, so that a front shell of the generator (the stator shell is a shell for fixing the stator and belongs to different parts with the front shell of the generator) can be omitted, a motor bearing is omitted, cost is greatly reduced, and the axial size is reduced.

3. The rotor shaft of the generator is directly connected (hard connected) with the crankshaft, the existing spline connection mode is replaced, a flywheel is omitted, energy loss is reduced, and NVH performance is improved.

4. The generator controller is directly integrated at the rear end of the generator, so that the installation space is saved.

Drawings

Fig. 1 is a schematic view of a range extender structure of a new energy vehicle according to an embodiment of the present invention.

Fig. 2 is another schematic diagram of a range extender structure according to an embodiment of the present invention.

1-engine, 11-crankshaft, 2-generator, 21-stator, 22-rotor, 3-generator controller.

Detailed Description

The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited by the following detailed description.

Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.

As shown in fig. 1 to 2, the range extender structure according to an embodiment of the present invention includes an engine 1 and a generator 2. The engine 1 has a crankshaft 11. The generator 2 has a rotor 22, a rotor holder 24 provided in the rotor 22, and a stator 21, and a rotor shaft 23 is provided on the rotor holder 24. The rotor shaft 23 is directly connected to the crankshaft 11. The generator 2 has no front housing, and the stator 21 is connected to the engine 1 through a stator housing. Which surrounds the stator 21 in the radial direction of the generator 2.

In this context, direct connection means that instead of a flexible connection or coupling, the crankshaft 11 of the engine 1 is directly connected (hard-wired) to the generator 2 and the rotor shaft 23, for example by a flange hard-wired connection or by a threaded socket. Energy losses can be avoided by the hard connection, and the mechanical energy output by the crankshaft 11 can be maximally transferred to the generator 2, avoiding the energy losses brought by the flexible connector.

In the threaded coupling, the crankshaft 11 may have an internal thread and the rotor shaft 23 may have an external thread. The rotor shaft 23 is screwed into the crankshaft 11 and is directly connected by a threaded connection. This manner of direct connection is different from the prior art flexible connectors that are connected by splines as the connecting member. Because the crankshaft 11 of the engine 1 and the rotor shaft 23 of the generator 2 are directly connected, the kinetic energy output by the engine 1 is directly transmitted to the rotor of the generator, the rotor bracket 24 with larger weight serves as the engine flywheel, and different rotary inertia is provided by means of the rotor bracket. The rotor assembly of the generator functions as a flywheel, which reduces the volume and synchronizes the rotational speed of the engine 1 and the rotational speed of the generator 2, so that both the engine and the generator can operate in an optimal high efficiency region by adjusting the rotational speed of the crankshaft.

In the present embodiment, the stator 21 is connected to the engine 1 through a stator housing. The stator housing is disposed around the stator 21 on both upper and lower sides of the generator. The utility model discloses owing to left out the procapsid of generator 2, spider and rotor shaft directly expose outside and directly link with the bent axle of engine 1, and fixed with the engine through stator housing. Since the stator housing is arranged in the radial space of the generator, no space is occupied in the axial direction. The axial space thus omits the front housing of the generator 2, making the axial length of the range extender more compact.

As shown in fig. 2, in an embodiment, the range extender structure further includes a generator controller 3 directly connected to the rear end of the generator 2 (the end away from the engine 1, i.e., the right end in fig. 2). Because the front shell of the generator is omitted, a certain space is saved in the axial direction, the generator controller 3 and the generator 2 are integrated together and mounted at the rear end of the engine 1, and the defect that the generator controller needs to be separately mounted with the generator 2 in an isolated mode to occupy a certain space in the prior art is overcome.

The embodiment of the utility model provides a new forms of energy vehicle is still disclosed, and it can load the above-mentioned range extender structure that mentions.

To sum up, according to the utility model discloses an increase journey ware structure, the advantage that has as follows:

1. the engine rotor shaft is directly connected with the crankshaft, and the stator is directly connected with the engine through the stator shell, so that a front shell of the generator can be omitted, a motor bearing is omitted, the cost is greatly reduced, and the axial size is reduced.

2. The rotor shaft of the generator is directly connected (hard connected) with the crankshaft, the existing spline connection mode is replaced, a flywheel is omitted, energy loss is reduced, and NVH performance is improved.

3. Because the front motor shell, the motor bearing and the shock absorber are omitted, the rotor support of the generator is closer to the engine end, and the rotor support can play a role of a flywheel to the maximum extent.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims

1. A range extender structure, comprising:

an engine having a crankshaft; and

the generator has the rotor, sets up spider and stator in the rotor, the last rotor shaft that is equipped with of spider, the rotor shaft with the bent axle directly links, the stator pass through stator housing with the engine is connected, wherein the generator does not have the procapsid, just stator housing is in surround on the radial direction of generator the stator.

2. The range extender structure of claim 1 further comprising a generator controller directly connected to a rear end of said generator.

3. The range extender structure of claim 1, wherein said rotor shaft is directly connected to said crankshaft by a flange.

4. The range extender structure of claim 1 wherein said crankshaft has internal threads and said rotor shaft has external threads, said rotor shaft being inserted into said crankshaft and directly connected by a threaded connection.

5. A new energy vehicle comprising the range extender structure of any one of claims 1-4.