Range extender and vehicle

Abstract

The utility model relates to the technical field of vehicles, and discloses a range extender and a vehicle, the range extender comprises an engine and a power generation unit, the engine comprises a crankshaft and a crankcase, and the crankshaft is rotatably arranged in the crankcase; the crankshaft comprises a first connecting end, a second connecting end and a crank throw group connected between the first connecting end and the second connecting end, and the crank throw group comprises a plurality of crank throws connected in sequence; each crank throw comprises two cranks and a connecting rod journal for connecting the two cranks, and the connecting rod journal is parallel to the direction from the first connecting end to the second connecting end; the power generation unit comprises a stator and a rotor, and the stator and the rotor are both located in the crankcase. The rotor sleeves the periphery of the crankshaft and is fixedly connected with a crank; the stator sleeves the periphery of the rotor and is coaxially arranged with the rotor; the stator is fixedly connected with the crankcase, and the rotor can be driven by the crankshaft to rotate relative to the stator. According to the range extender and the vehicle, the problem that an existing range extender is large in size is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, and in particular to a range extender and a vehicle. Background Art

[0002] At present, the new energy vehicle industry is developing rapidly, and the range extender is the representative of the series route among hybrid vehicles. The design of the range extender is tending towards miniaturization and lightweight. In the relevant technology, the connection between the engine crankshaft and the generator shaft in the range extender is generally divided into two types: connection through a coupling and rigid direct connection. Both of these connection methods have the problem of large size of the range extender, which is not conducive to the miniaturization and lightweight development of the range extender. Utility Model Content

[0003] The utility model provides a range extender and a vehicle, which are used to improve the problem of a large volume of the range extender.

[0004] In order to achieve the above object, the utility model provides the following technical solutions:

[0005] A range extender includes an engine and a power generation unit, wherein:

[0006] The engine comprises a crankshaft and a crankcase, wherein the crankshaft is rotatably arranged in the crankcase; the crankshaft comprises a first connecting end, a second connecting end and a crank set connected between the first connecting end and the second connecting end, wherein the crank set comprises a plurality of cranks connected in sequence; each crank comprises two cranks and a connecting rod journal connecting the two cranks, wherein the connecting rod journal is parallel to the direction from the first connecting end to the second connecting end;

[0007] The power generation unit includes a stator and a rotor, and both the stator and the rotor are located in the crankcase; the rotor is sleeved on the outer circumference of the crankshaft and fixedly connected to one of the cranks; the stator is sleeved on the outer circumference of the rotor and is coaxially arranged with the rotor; the stator is fixedly connected to the crankcase, and the rotor can rotate relative to the stator driven by the crankshaft.

[0008] In this scheme, the stator and rotor of the power generation unit are both located in the crankcase, the stator is fixed to the crankcase, and the rotor is fixed to the crank, that is, the power generation unit is integrated into the engine, and there is no need to set up the rotating shaft of the power generation unit separately. Therefore, the volume and weight of the range extender can be greatly reduced, which is more conducive to the miniaturization and lightweight of the range extender. In addition, the crankshaft, as the rotating shaft of the power generation unit, eliminates the intermediate connection link compared to the case where the crankshaft and the rotating shaft of the power generation unit are connected by transmission, which can improve the reliability of the range extender and reduce the loss of energy transmitted at the connection and reduce the stress on the engine crankshaft. The stator and rotor are installed in the crankcase and share the cooling system with the engine. The stator and rotor are cooled by splashing and flowing lubricating oil, which can reduce the layout of the cooling pipeline, which is conducive to simplifying the structure of the range extender and reducing the volume of the range extender.

[0009] Optionally, each crank corresponds to a power generation unit, the rotor is fixed to the outer circumference of the corresponding crank, the stator is sleeved on the outer circumference of the corresponding rotor and is coaxially arranged with the rotor; the rotor can rotate relative to the corresponding stator driven by the crankshaft.

[0010] Optionally, in each of the cranks, at least one crank is connected to a counterweight; the crank provided with the counterweight is a first crank, and the rotor corresponding to the first crank is fixed to the corresponding counterweight.

[0011] Optionally, one of the crank and the rotor is provided with a first limiting protrusion, and the other of the crank and the rotor is provided with a first limiting groove, and the first limiting protrusion is engaged with the first limiting groove.

[0012] Optionally, the inner wall of the crankcase is provided with mounting grooves, the mounting grooves correspond to the stators one-to-one, and the stators are installed in the corresponding mounting grooves.

[0013] Optionally, one of the mounting slot and the stator is provided with a second limiting protrusion, and the other of the mounting slot and the stator is provided with a second limiting groove, and the second limiting protrusion is engaged with the second limiting groove.

[0014] Optionally, the rotor is a squirrel cage rotor, a wound rotor, or a silicon steel sheet rotor with embedded permanent magnets.

[0015] Optionally, the stator is a concentrated winding stator.

[0016] Optionally, the range extender includes a rotary transformer, and the rotary transformer is installed at the first connection end.

[0017] The utility model also provides a vehicle, comprising a frame and any one of the range extenders provided in the above technical solution, wherein the range extender is fixed to the frame. The vehicle comprises the above range extender, and thus, at least the technical effects that can be achieved by the above range extender can be achieved, and the specific effects will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the partial structure of a range extender provided in an embodiment of the utility model;

[0019] Figure 2 for Figure 1 Exploded diagram of

[0020] Figure 3 A cross-sectional view of a range extender provided in an embodiment of the utility model.

[0021] Icons: 11-crankshaft; 12-first connecting end; 13-crank throw; 131-crank; 132-connecting rod journal; 1311-balance weight; 14-first limiting protrusion; 15-first limiting groove; 2-power generation unit; 21-stator; 22-rotor; 3-limiting ring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figure 1-Figure 3As shown, a range extender provided in the present application includes an engine and a power generation unit 2, wherein the engine includes a crankshaft 11 and a crankshaft 11 box (not shown in the figure), the crankshaft 11 is rotatably arranged in the crankshaft 11 box, and the specific connection method between the crankshaft 11 and the crankshaft 11 box can refer to the prior art. Further, the crankshaft 11 includes a first connecting end 12, a second connecting end and a crank group connected between the first connecting end 12 and the second connecting end, and the crank group includes a plurality of cranks 13 connected in sequence. Each crank 13 includes two cranks 131 and a connecting rod journal 132 connecting the two cranks 131, and the connecting rod journal 132 is parallel to the direction from the first connecting end 12 to the second connecting end. The power generation unit 2 includes a stator 21 and a rotor 22, and the stator 21 and the rotor 22 are both located in the crankshaft 11 box. Specifically, the rotor 22 is sleeved on the outer periphery of the crankshaft 11 and is fixedly connected to a crank 131. The stator 21 is sleeved on the outer periphery of the rotor 22 and is coaxially arranged with the rotor 22. The stator 21 is fixedly connected to the crankshaft 11 case, and the rotor 22 can rotate relative to the stator 21 driven by the crankshaft 11. In this solution, the stator 21 and the rotor 22 of the power generation unit 2 are both located in the crankshaft 11 case, the stator 21 is fixed to the crankshaft 11 case, and the rotor 22 is fixed to the crank 131, that is, the power generation unit 2 is integrated into the engine, and there is no need to separately set up the rotating shaft of the power generation unit 2. Therefore, the volume and weight of the range extender can be greatly reduced, which is more conducive to the miniaturization and lightweight of the range extender. In addition, the crankshaft 11, as the rotating shaft of the power generation unit 2, eliminates the intermediate connection link compared to the case where the crankshaft 11 is connected to the rotating shaft of the power generation unit 2 by transmission, which can improve the reliability of the range extender and reduce the loss of energy transmitted at the connection and reduce the stress on the engine crankshaft 11. The stator 21 and the rotor 22 are installed in the crankshaft case 11 and share a cooling system with the engine. The stator 21 and the rotor 22 are cooled by splashing and flowing lubricating oil, which can reduce the layout of cooling pipes, which is beneficial to simplifying the structure of the range extender and reducing the volume of the range extender.

[0024] In some embodiments, each crank 131 corresponds to a power generation unit 2, that is, each crank 13 corresponds to two power generation units 2. Furthermore, the rotor 22 is fixed to the outer periphery of the corresponding crank 131, and the stator 21 is sleeved on the outer periphery of the corresponding rotor 22 and is coaxially arranged with the rotor 22. The rotor 22 can rotate relative to the corresponding stator 21 driven by the crankshaft 11. In this way, the space of the crankshaft 11 box is utilized as fully as possible, and as many power generation units 2 as possible are arranged, so that the power generation capacity of the range extender is stronger. Exemplarily, the engine is a 6-cylinder engine, that is, there are 6 cranks 13 and 12 power generation units 2.

[0025] Further, in a specific embodiment, in each crank 13, at least one crank 131 is connected to a counterweight 1311. That is, one crank 131 in each crank 13 is connected to a counterweight 1311 or both cranks 131 are connected to a counterweight 1311. The crank 131 provided with the counterweight 1311 is the first crank, and the rotor 22 corresponding to the first crank is fixed to the corresponding counterweight 1311.

[0026] In a specific implementation, one of the crank 131 and the corresponding rotor 22 is provided with a first limiting protrusion 14, and the other of the two is provided with a first limiting groove 15, and the first limiting protrusion 14 is engaged with the first limiting groove 15, so as to fix the rotor 22 to the crank 131. The crank 131 and the corresponding rotor 22 are engaged by the first limiting protrusion 14 and the first limiting groove 15, so that the structures of the crank 131 and the rotor 22 are more simplified, which is conducive to reducing the difficulty of processing and assembling components.

[0027] In some embodiments, the inner wall of the crankshaft 11 case is provided with a mounting groove, and the mounting groove corresponds to the stator 21 one by one, and the stator 21 is installed in the corresponding mounting groove. Exemplarily, the silicon steel sheet of the stator 21 is fixed to the mounting groove of the crankshaft 11 case by a cold sleeve process, and an interference fit is formed at room temperature.

[0028] Further, one of the mounting groove and the stator 21 is provided with a second limiting protrusion, and the other of the mounting groove and the stator 21 is provided with a second limiting groove, and the second limiting protrusion is engaged with the second limiting groove, so that the stator 21 is fixed to the crankshaft 11. The mounting groove and the stator 21 are engaged by the second limiting protrusion and the second limiting groove, so that the structures of the mounting groove and the stator 21 are simplified, which is conducive to reducing the difficulty of processing and assembling components.

[0029] Specifically, the rotor 22 is a squirrel cage rotor, a wound rotor, or a silicon steel sheet rotor with embedded permanent magnets. For example, when the rotor 22 is a silicon steel sheet rotor with embedded permanent magnets, the rotor 22 is installed at the position of the balance weight 1311 of the crankshaft 11 by interference fit, which is an interference fit at room temperature.

[0030] In a specific implementation, the stator 21 is a concentrated winding stator. The stator 21 is a concentrated winding stator, and the winding head of the stator 21 is smaller, which is conducive to reducing the volume of the range extender while arranging as many power generation units 2 as possible.

[0031] In some embodiments, the range extender includes a rotary transformer, which is mounted on the first connection end 12 of the crankshaft 11 to provide accurate real-time rotational position of the generator rotor 22 and the engine. Exemplarily, the rotary transformer is mounted on the first connection end 12 of the crankshaft 11 through its own limit ring 3.

[0032] A vehicle provided in the present application includes a frame and the above-mentioned range extender, and the range extender is fixed to the frame. In the vehicle, the stator 21 and the rotor 22 of the power generation unit 2 are both located in the crankshaft 11 box, the stator 21 is fixed to the crankshaft 11 box, and the rotor 22 is fixed to the crank 131, that is, the power generation unit 2 is integrated into the engine, and there is no need to separately set the rotating shaft of the power generation unit 2, so that the volume and weight of the range extender can be greatly reduced, which is more conducive to the miniaturization and lightweight of the range extender. In addition, the crankshaft 11 is used as the rotating shaft of the power generation unit 2. Compared with the case where the crankshaft 11 is connected to the rotating shaft of the power generation unit 2 by transmission, the intermediate connection link is omitted, which can improve the reliability of the range extender and reduce the loss of energy transmitted at the connection, and reduce the force on the engine crankshaft 11. The stator 21 and the rotor 22 are installed in the crankshaft 11 box, and share the cooling system with the engine, which can reduce the layout of the cooling pipeline, which is conducive to simplifying the structure of the range extender and reducing the volume of the range extender.

[0033] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A range extender, characterized in that: It includes an engine and a power generation unit, wherein: The engine comprises a crankshaft and a crankcase, wherein the crankshaft is rotatably arranged in the crankcase; the crankshaft comprises a first connecting end, a second connecting end and a crank set connected between the first connecting end and the second connecting end, wherein the crank set comprises a plurality of cranks connected in sequence; each crank comprises two cranks and a connecting rod journal connecting the two cranks, wherein the connecting rod journal is parallel to the direction from the first connecting end to the second connecting end; The power generation unit includes a stator and a rotor, and both the stator and the rotor are located in the crankcase; the rotor is sleeved on the outer circumference of the crankshaft and fixedly connected to one of the cranks; the stator is sleeved on the outer circumference of the rotor and is coaxially arranged with the rotor; the stator is fixedly connected to the crankcase, and the rotor can rotate relative to the stator driven by the crankshaft.

2. The range extender according to claim 1, characterized in that: Each crank corresponds to a power generation unit, the rotor is fixed to the outer circumference of the corresponding crank, the stator is sleeved on the outer circumference of the corresponding rotor and is coaxially arranged with the rotor; the rotor can rotate relative to the corresponding stator driven by the crankshaft.

3. The range extender according to claim 2, characterized in that: In each of the cranks, at least one crank is connected to a counterweight; the crank provided with the counterweight is a first crank, and the rotor corresponding to the first crank is fixed to the corresponding counterweight.

4. The range extender according to any one of claims 1 to 3, characterized in that: One of the crank and the rotor is provided with a first limiting protrusion, and the other of the crank and the rotor is provided with a first limiting groove, and the first limiting protrusion is engaged with the first limiting groove.

5. The range extender according to any one of claims 1 to 3, characterized in that: The inner wall of the crankcase is provided with mounting grooves, the mounting grooves correspond to the stators one by one, and the stators are mounted in the corresponding mounting grooves.

6. The range extender according to claim 5, characterized in that: One of the installation slot and the stator is provided with a second limiting protrusion, and the other of the installation slot and the stator is provided with a second limiting groove, and the second limiting protrusion is engaged with the second limiting groove.

7. The range extender according to any one of claims 1 to 3, characterized in that: The rotor is a squirrel cage rotor, a wound rotor or a silicon steel sheet rotor with embedded permanent magnets.

8. The range extender according to any one of claims 1 to 3, characterized in that: The stator is a concentrated winding stator.

9. The range extender according to any one of claims 1 to 3, characterized in that: A rotary transformer is included, and the rotary transformer is installed at the first connection end.

10. A vehicle, characterized in that: The vehicle comprises a vehicle frame and a range extender as claimed in any one of claims 1 to 9, wherein the range extender is fixed to the vehicle frame.

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