CN217753460U

CN217753460U - Range extender connecting structure

Info

Publication number: CN217753460U
Application number: CN202220990750.8U
Authority: CN
Inventors: 李思航; 赵文虎; 耿志勇; 王东斌
Original assignee: Shaanxi Automobile Group Co Ltd
Current assignee: Shaanxi Automobile Group Co Ltd
Priority date: 2022-04-24
Filing date: 2022-04-24
Publication date: 2022-11-08
Anticipated expiration: 2032-04-24

Abstract

The utility model relates to a range extender connecting structure, which comprises an engine crankshaft for transmitting engine power, a generator rotor shaft for transmitting power to a generator and a spline connecting shaft; the end part of the engine crankshaft is provided with an engine crankshaft flange, one end of the spline connecting shaft is provided with a spline connecting shaft flange, the spline connecting shaft flange is fixedly connected with the engine crankshaft flange, and the other end of the spline connecting shaft is fixedly connected with a generator rotor shaft. The utility model discloses a spline connecting axle directly links generator rotor shaft and engine crankshaft, makes the power transmission of engine to the generator. The flywheel of the engine is eliminated, the rotational inertia of the flywheel is integrated on the rotor shaft of the generator, the weight of the range extender is reduced, the length of the range extender assembly is shortened, the connection reliability of the generator and the engine is improved, and the installation is convenient.

Description

Range extender connecting structure

Technical Field

The utility model relates to a new forms of energy hybrid vehicle increases journey ware technical field, especially relates to an increase journey ware connection structure.

Background

The driving range of the pure electric vehicle is about 200km, and users can not fully meet the requirements of customers by transregional and multi-frequency transportation. The pure electric commercial vehicle has large power distribution quantity, causes the self weight of the whole vehicle, reduces the goods delivery of customers, has large energy consumption loss and is not ideal for the economy of the whole vehicle. The range extender can effectively solve five anxiety of mileage, safety, charging, battery and price in the use of the pure electric vehicle, and has high dynamic property and braking energy recovery rate. The internal combustion engine and the generator can work in a high-efficiency area, the fuel economy is better, and the method is an effective way for the future transition of fuel automobiles to pure electric automobiles. At present, the most form of the range extender connecting structure is a connecting mode of a flywheel and a torsional damper, but the connecting mode can increase the number of parts of the range extender assembly, is difficult to assemble and disassemble, increases the axial length of the range extender assembly, increases the weight and reduces the power density of the range extender.

SUMMERY OF THE UTILITY MODEL

The utility model provides an increase journey ware connection structure, cancel the engine flywheel and twist reverse the bumper shock absorber, increase journey ware generator rotor shaft and directly link through spline connecting axle and engine crankshaft, with the inertia integration of flywheel on generator rotor shaft, guarantee to increase journey ware can steady operation, increase journey ware structure compacter.

In order to solve the problems in the background art, the utility model discloses a realize through following technical scheme:

a range extender connecting structure comprises an engine crankshaft for transmitting engine power, a generator rotor shaft for transmitting power to a generator and a spline connecting shaft; the end part of the engine crankshaft is provided with an engine crankshaft flange, one end of the spline connecting shaft is provided with a spline connecting shaft flange, the spline connecting shaft flange is fixedly connected with the engine crankshaft flange, and the other end of the spline connecting shaft is fixedly connected with a generator rotor shaft.

As a further explanation of the utility model: the generator rotor shaft is provided with an internal spline, the spline connecting shaft is provided with an external spline matched with the internal spline, and the generator rotor shaft is sleeved on the spline connecting shaft and connected through the spline.

As a further explanation of the utility model: the engine crankshaft flange is provided with a plurality of bolt holes which are uniformly distributed around the axial direction of the engine crankshaft, the spline connecting shaft flange is provided with through holes corresponding to the bolt holes in size and position, and the engine crankshaft flange is connected with the spline connecting shaft flange through mounting bolts.

As a further explanation of the utility model: the engine crankshaft flange is provided with an axial positioning groove in the middle, and the spline connecting shaft flange is provided with a positioning shaft shoulder matched with the axial positioning groove in the middle.

As a further explanation of the utility model: and a tool withdrawal groove is formed in the part, close to the spline connecting shaft flange, of the surface of the spline connecting shaft.

As a further explanation of the utility model: the engine crankshaft flange is provided with a positioning hole, and the spline connecting shaft flange is provided with a positioning pin.

Compared with the prior art, the utility model discloses following profitable technological effect has:

1) A spline connecting shaft is adopted to directly connect a generator rotor shaft with an engine crankshaft, so that the power of the engine is transmitted to the generator rotor shaft. An engine flywheel is eliminated, and the rotational inertia of the flywheel is integrated on a rotor shaft of the generator. The weight of the range extender is reduced, the length of the range extender assembly is shortened, the connection reliability of the generator and the engine is improved, and the installation is convenient.

2) The range extender has the advantages of more compact structure, lower production and manufacturing cost and simple and convenient later-stage range extender disassembly, assembly and maintenance. The rotor assembly of the generator adopts cast aluminum, and the lightweight requirement is met.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is an enlarged view of the present invention;

fig. 3 is a schematic structural view of the engine crankshaft flange of the present invention.

Description of the reference numerals

1. An engine; 2. an engine crankshaft; 3. an engine crankshaft flange; 3a, positioning holes; 3b, bolt holes; 4. an axial positioning groove; 5. a spline connecting shaft; 5a, positioning a shaft shoulder; 5b, a tool withdrawal groove; 5c, external splines; 6. a generator rotor shaft; 7. a generator; 7a, an internal spline; 8. and (6) installing a bolt.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, or the directions or positional relationships that the products of the present invention are usually placed when used, and are only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element indicated must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to fig. 2, the embodiment of the present invention discloses a connection structure of a range extender, which includes an engine crankshaft 2 for transmitting engine power, a generator rotor shaft 6 for transmitting power to a generator, and a spline connection shaft 5; the end of the engine crankshaft 2 is provided with an engine crankshaft flange 3, one end of the spline connecting shaft 5 is provided with a spline connecting shaft flange, the spline connecting shaft flange is fixedly connected with the engine crankshaft flange 3, and the other end of the spline connecting shaft 5 is fixedly connected with a generator rotor shaft 6.

The generator rotor shaft 6 is provided with an internal spline 7a, the spline connecting shaft 5 is provided with an external spline 5c matched with the internal spline 7a, and the generator rotor shaft 6 is sleeved on the spline connecting shaft 5 and connected through a spline. The two are connected through a spline, so that the mounting is convenient and the power transmission is reliable.

The engine crankshaft flange 3 is provided with a plurality of bolt holes 3b which are uniformly distributed around the axial direction of the engine crankshaft 2, the spline connecting shaft flange is provided with through holes corresponding to the bolt holes 3b in size and position, and the engine crankshaft flange 3 is connected with the spline connecting shaft flange through mounting bolts 8.

When the range extender engine 1 and the generator 7 are installed, the spline connecting shaft 5 is connected with the crankshaft flange 3 by utilizing the installation bolt 8 to penetrate through the through hole on the spline connecting shaft flange from the motor end. The generator 7 is integrally moved, so that the internal spline 7a of the generator rotor shaft 6 is matched with the external spline 5c of the spline connecting shaft until the end face of the generator is contacted with the rear end face of the engine. And finally, connecting the generator with the engine through a bolt.

The range extender outputs power through the crankshaft 2 of the engine, and drives the input shaft of the generator to move under the connection of the flange, so that power generation is realized.

The middle of the engine crankshaft flange 3 is provided with an axial positioning groove 4, the middle of the spline connecting shaft flange is provided with a positioning shaft shoulder 5a matched with the axial positioning groove 4, and the spline connecting shaft 5 and the engine crankshaft 2 are guaranteed to be accurately matched in the axial direction.

The part of the surface of the spline connecting shaft 5, which is close to the spline connecting shaft flange, is provided with a tool withdrawal groove 5b, so that the production and the processing are convenient.

As shown in fig. 3, a positioning hole 3a is formed in the engine crankshaft flange 3, and a positioning pin is arranged on the spline connecting shaft flange to ensure accurate positioning.

The engine crankshaft flange 3 is a flange plate flange, a plurality of bolt holes 3b which are uniformly distributed around the axial direction of the engine crankshaft 2 are arranged on the engine crankshaft flange 3, and a positioning hole 3a is further arranged in the middle of the two bolt holes 3b in the upper portion of the engine crankshaft flange 3. The spline connecting shaft flange is a flange plate flange, and a through hole matched with the bolt hole 3b in size and a positioning pin matched with the positioning hole 3a are arranged on the flange plate flange. The spline connecting shaft and the engine crankshaft 2 can be fixedly connected through the mounting bolt 8, and the power of the engine 1 can be transmitted to the generator 7.

The utility model discloses cancelled the engine flywheel and twisted reverse the bumper shock absorber, engine crankshaft 2 with increase journey ware generator rotor shaft 6 directly link through spline connecting axle 5 and engine crankshaft 2, with the inertia integration of flywheel on generator rotor shaft, guarantee to increase journey ware can steady operation. The range extender is more compact in structure, lighter in weight, lower in manufacturing cost and simple and convenient to disassemble, assemble and maintain in the later stage. The rotor assembly of the generator adopts cast aluminum, and the lightweight requirement is met.

The present invention is not limited to the above-mentioned optional embodiments, and any other products in various forms can be obtained by anyone under the teaching of the present invention, and any changes in the shape or structure thereof, all the technical solutions falling within the scope of the present invention, are within the protection scope of the present invention.

Claims

1. A range extender connection structure is characterized in that: comprises an engine crankshaft (2) for transmitting engine power, a generator rotor shaft (6) for transmitting power to a generator and a spline connecting shaft (5); the end of the engine crankshaft (2) is provided with an engine crankshaft flange (3), one end of the spline connecting shaft (5) is provided with a spline connecting shaft flange, the spline connecting shaft flange is fixedly connected with the engine crankshaft flange (3), and the other end of the spline connecting shaft (5) is fixedly connected with a generator rotor shaft (6).

2. The range extender coupling structure of claim 1, wherein: be equipped with internal spline (7 a) on generator rotor shaft (6), be equipped with on spline connecting axle (5) with internal spline (7 a) complex external spline (5 c), generator rotor shaft (6) cover is established on spline connecting axle (5) and through splined connection.

3. The range extender connecting structure according to claim 1, wherein: the engine crankshaft flange (3) is provided with a plurality of bolt holes (3 b) which are uniformly distributed around the axial direction of the engine crankshaft (2), the spline connecting shaft flange is provided with through holes corresponding to the bolt holes (3 b) in size and position, and the engine crankshaft flange (3) is connected with the spline connecting shaft flange through mounting bolts (8).

4. The range extender coupling structure of claim 3, wherein: an axial positioning groove (4) is formed in the middle of the engine crankshaft flange (3), and a positioning shaft shoulder (5 a) matched with the axial positioning groove (4) is formed in the middle of the spline connecting shaft flange.

5. The range extender connecting structure according to claim 1, wherein: and a tool withdrawal groove (5 b) is formed in the surface of the spline connecting shaft (5) close to the flange of the spline connecting shaft.

6. The range extender connecting structure according to claim 1, wherein: the engine crankshaft flange (3) is provided with a positioning hole (3 a), and the spline connecting shaft flange is provided with a positioning pin.