Range extender assembly and automobile
By introducing a speed increase mechanism and a generator assembly structure arranged in the range extender, the problem of high cost of the existing range extender is solved, and efficient power generation and cost reduction of the generator assembly is achieved.
Patent Information
- Application Number
- CN202420698855.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-07
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-04-07
AI Technical Summary
The existing range extenders are costly, mainly because the generator and engine are at the same speed, resulting in a high cost of generators.
By introducing a speed increase mechanism into the range extender, the crankshaft speed of the engine is matched with the rotor speed of the generator assembly, and unnecessary support components are cancelled through the rotor and stator structure arranged separately, reducing costs.
It realizes efficient power generation of generator components, ensures its reliable operation, and at the same time reduces the volume and cost of generator components, thereby reducing the production cost of the entire range extender assembly.
Smart Images
Figure CN222591252U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of range extenders, in particular to a range extender assembly and a vehicle. Background Art
[0002] With the advancement of technology, new energy vehicles have been rapidly developed and applied, and their cruising range has received widespread attention from drivers and passengers. The range extender came into being. As a component of new energy vehicles, it can provide additional electrical energy for new energy vehicles, thereby increasing the mileage of new energy vehicles and further improving the cruising range of new energy vehicles. The range extender usually includes an engine and a generator used in conjunction with the engine. The input end of the generator is directly connected to the output shaft of the engine, so that the generator is driven by the rotation of the engine output shaft, and then the generator can be used to generate electricity. However, the generator and the engine have the same speed, and the torque of the generator is large, which makes the cost of the generator relatively high, and also increases the cost of the entire range extender. Utility Model Content
[0003] The main purpose of the utility model is to provide a range extender assembly and a vehicle, aiming to solve the technical problem of high cost of existing range extenders.
[0004] To achieve the above objectives, the present invention provides a range extender assembly, which includes:
[0005] an engine having a crankshaft;
[0006] A generator assembly, the generator assembly comprising a rotor and a stator which are separately arranged, the stator being fixedly connected to the engine; and
[0007] The speed increasing mechanism is arranged between the crankshaft and the rotor. The crankshaft and the rotor are connected through the speed increasing mechanism. The rotor is suspended inside the stator through the speed increasing mechanism.
[0008] Optionally, in one embodiment of the utility model, the speed increasing mechanism includes a gearbox and a speed increasing gear set arranged in the gearbox, the gearbox is connected to the engine, the speed increasing gear set is connected to the crankshaft and the rotor, the generator assembly also includes a housing connected to the gearbox, the stator and the rotor are arranged inside the housing, and the stator is fixedly connected to the housing.
[0009] Optionally, in one embodiment of the utility model, the speed increasing gear set includes a first gear and a second gear that are meshingly connected, the first gear is connected to the crankshaft, the second gear is connected to the rotor, the first gear and the second gear are rotatably arranged in the gear box, wherein the number of teeth of the first gear is greater than the number of teeth of the second gear.
[0010] Optionally, in an embodiment of the present invention, the first gear is detachably connected to the crankshaft; and / or the second gear is detachably connected to the rotor.
[0011] Optionally, in an embodiment of the present invention, the first gear is integrally arranged with the crankshaft; and / or the second gear is integrally arranged with the rotor.
[0012] Optionally, in an embodiment of the utility model, the speed increasing gear set further includes a support bearing, the support bearing is disposed inside the gear box, and the second gear is rotatably disposed inside the gear box via the support bearing.
[0013] Optionally, in an embodiment of the present invention, the housing and the gear box are in communication to share a cooling lubricant.
[0014] Optionally, in one embodiment of the utility model, the gear box is provided with a first opening, the housing is provided with a second opening, and the second opening is arranged corresponding to the first opening; the gear box has a first bottom wall, the housing has a second bottom wall, the first bottom wall is lower than the second bottom wall, and the second bottom wall is not lower than the second opening.
[0015] Optionally, in an embodiment of the utility model, the housing is further provided with a disassembly opening, the disassembly opening is arranged opposite to the second opening, and the disassembly opening is detachably provided with an end cover to open or close the disassembly opening.
[0016] To achieve the above objectives, an embodiment of the present utility model provides a vehicle, which includes the range extender assembly described above.
[0017] Compared with the prior art, in a technical solution proposed by the utility model, the engine and the generator assembly are connected through a speed-increasing mechanism. The speed-increasing mechanism can be used to increase the speed and reduce the torque of the crankshaft of the engine, thereby achieving the speed matching of the engine and the generator assembly and the best matching of the high-efficiency zone, improving the power generation efficiency of the generator assembly, and ensuring the reliable operation of the generator assembly. At the same time, the volume of the generator assembly with the same power can be reduced, and the cost of the generator assembly can be effectively reduced, thereby reducing the production cost of the range extender assembly. Moreover, the rotor and the stator in the generator assembly are separately arranged, that is, the rotor is fixedly connected to the crankshaft through the speed-increasing mechanism, and the stator is directly fixedly connected to the engine, and there is no direct connection between the rotor and the stator. Compared with the stator and the rotor in the conventional generator as an integral arrangement, the rotor in the generator assembly of this embodiment is fixed by the speed-increasing mechanism and suspended inside the stator, eliminating the use of supporting components such as bearings, which can further reduce the production cost of the generator assembly, thereby reducing the production cost of the range extender assembly. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0019] Figure 1 It is a structural schematic diagram of an embodiment of the range extender assembly of the utility model.
[0020] Description of Figure Numbers:
[0021] Label name Label name 100 engine 110 Crankshaft 200 Generator components 210 Rotor 220 shell 221 Second bottom wall 300 Speed increasing mechanism 310 Gearbox 311 First bottom wall 320 Speed increasing gear set 321 First Gear 322 Second gear
[0022] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0023] 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 of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the embodiments of the utility model.
[0024] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0025] In addition, in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the embodiments of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0026] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.
[0027] In addition, the technical solutions between the various embodiments of the present utility model can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the embodiments of the present utility model.
[0028] As a component of new energy vehicles, the range extender can provide additional electric energy for new energy vehicles, thereby increasing the mileage of new energy vehicles and further improving the endurance of new energy vehicles. The range extender usually includes an engine and a generator used in conjunction with the engine. The input end of the generator is directly connected to the output shaft of the engine, so that the generator is driven by the rotation of the engine output shaft, and then the generator can be used to generate electricity. However, the generator and the engine have the same speed, so when selecting the generator, it is necessary to choose a low-speed, high-torque solution, which increases production costs.
[0029] In view of this, the embodiment of the utility model provides a range extender assembly and a vehicle, wherein the engine and the generator assembly are connected through a speed increasing mechanism, and the speed increasing mechanism can be used to increase the speed and reduce the torque of the engine crankshaft. The selection scheme of the generator assembly is no longer limited to low speed and high torque, and the volume of the generator assembly of the same power can be reduced, which effectively reduces the cost of the generator assembly, thereby reducing the production cost of the range extender assembly. Moreover, the rotor and stator in the generator assembly are separately arranged, that is, the rotor is directly mounted on the crankshaft of the engine through the speed increasing mechanism, and the stator is directly mounted on the engine. There is no direct connection or assembly relationship between the rotor and the stator, and the use of supporting components such as bearings is eliminated, which can further reduce the production cost of the generator assembly, thereby reducing the production cost of the range extender assembly.
[0030] In order to better understand the above technical solution, the above technical solution is described in detail below with reference to the accompanying drawings.
[0031] like Figure 1 As shown, the embodiment of the utility model provides a range extender assembly, and the range extender assembly includes:
[0032] The engine 100 has a crankshaft 110;
[0033] A generator assembly 200, the generator assembly 200 includes a rotor 210 and a stator which are separately arranged, and the stator is fixedly connected to the engine 100; and
[0034] The speed increasing mechanism 300 is disposed between the crankshaft 110 and the rotor 210 . The crankshaft 110 and the rotor 210 are connected via the speed increasing mechanism 300 , and the rotor 210 is suspended inside the stator via the speed increasing mechanism 300 .
[0035] In the technical solution adopted in this embodiment, the engine 100 and the generator assembly 200 are connected through the speed increasing mechanism 300. The speed increasing mechanism 300 can be used to increase the speed and reduce the torque of the crankshaft 110 of the engine 100, thereby achieving the speed matching of the engine 100 and the generator assembly 200 and the best matching of the high-efficiency zone, improving the power generation efficiency of the generator assembly 200, and ensuring the reliable operation of the generator assembly 200. At the same time, the volume of the generator assembly 200 with the same power can be reduced, and the cost of the generator assembly 200 can be effectively reduced, thereby reducing the production cost of the range extender assembly. Moreover, the rotor 210 and the stator in the generator assembly 200 are separately arranged, that is, the rotor 210 is fixedly connected to the crankshaft 110 through the speed increasing mechanism 300, and the stator is directly fixedly connected to the engine 100, and there is no direct connection between the rotor 210 and the stator. Compared with the stator and rotor 210 in a conventional generator which are arranged as an integral whole, the rotor 210 in the generator assembly 200 of this embodiment is fixed by a speed increasing mechanism 300 and suspended inside the stator, eliminating the use of supporting components such as bearings, which can further reduce the production cost of the generator assembly 200, and thus reduce the production cost of the range extender assembly.
[0036] For example, refer to Figure 1 In one embodiment of the utility model, the speed increasing mechanism 300 includes a gear box 310 and a speed increasing gear set 320 arranged in the gear box 310, the gear box 310 is connected to the engine 100, the speed increasing gear set 320 is connected to the crankshaft 110 and the rotor 210, the generator assembly 200 also includes a housing 220 connected to the gear box 310, the stator and the rotor 210 are arranged inside the housing 220, and the stator is fixedly connected to the housing 220.
[0037] Specifically, the speed increasing mechanism 300 includes a gearbox 310 and a speed increasing gear set 320, wherein the gearbox 310 provides an installation space for the gear set, and can also protect the speed increasing gear set 320 to prevent damage caused by external force collision. In the present embodiment, the gearbox 310 is connected to the engine 100, that is, the gearbox 310 is directly mounted on the engine 100, and can be fixed by welding or bolting, which is not limited here. The speed increasing gear set 320 is arranged inside the gearbox 310, and is used to increase the speed of the crankshaft 110 and reduce the torque. By increasing the speed and reducing the torque through the speed increasing gear set 320, the volume of the speed increasing mechanism 300 can be made smaller and lighter, thereby reducing the weight of the entire speed increasing device assembly and facilitating transportation and operation. In one embodiment, the housing 220 is fixed to the gearbox 310 by bolts.
[0038] For example, refer to Figure 1 In one embodiment of the utility model, the speed increasing gear set 320 includes a first gear 321 and a second gear 322 which are meshingly connected, the first gear 321 is connected to the crankshaft 110, the second gear 322 is connected to the rotor 210, the first gear 321 and the second gear 322 are rotatably arranged in the gear box 310, wherein the number of teeth of the first gear 321 is greater than the number of teeth of the second gear 322.
[0039] Specifically, the speed increasing gear set 320 includes a first gear 321 and a second gear 322, wherein the number of teeth of the first gear 321 is greater than the number of teeth of the second gear 322. The first gear 321 is directly mounted on the rear end face of the crankshaft 110, and the second gear 322 is rotatably arranged inside the gear box 310 through a support shaft. The second gear 322 and the rotor 210 are coaxially connected and can rotate synchronously. The first gear 321 and the second gear 322 are meshed, and the second gear 322 rotates at a high speed driven by the first gear 321. It can be understood that when the crankshaft 110 of the engine 100 rotates, the first gear 321 rotates synchronously with the crankshaft 110, thereby driving the second gear 322 to rotate at a high speed, thereby realizing the rotation of the rotor 210.
[0040] Illustratively, in one embodiment of the utility model, the first gear 321 is detachably connected to the crankshaft 110, such as a bolt connection or a pin connection, so that the disassembly and maintenance of the first gear 321 can be facilitated. That is, the failure rate of the first gear 321 is relatively high, and the first gear 321 can be repaired and replaced separately, thereby reducing maintenance costs; and / or, the second gear 322 is detachably connected to the rotor 210, so that the second gear 322 can be repaired separately, thereby reducing maintenance costs.
[0041] Illustratively, in one embodiment of the utility model, the first gear 321 is integrally arranged with the crankshaft 110, which can save the use of connecting components, further reduce production costs, and improve the connection strength between the first gear 321 and the crankshaft 110; and / or, the second gear 322 is integrally arranged with the rotor 210, which can save the use of connecting components, further reduce production costs, and improve the connection strength between the second gear 322 and the rotor 210.
[0042] Exemplarily, in an embodiment of the present invention, the speed increasing gear set 320 further includes a support bearing, which is disposed inside the gear box 310 , and the second gear 322 is rotatably disposed inside the gear box 310 via the support bearing.
[0043] Specifically, the support bearing is arranged inside the gear box 310. Optionally, the support bearing is arranged on the inner wall of the gear box 310. One end of the support shaft extends into the inner ring of the support bearing, and the other end of the support shaft is connected to the second gear 322. In this way, the second gear 322 can be supported and fixed on the basis of ensuring the rotation of the second gear 322, which is conducive to the smooth rotation of the second gear 322.
[0044] Illustratively, in one embodiment of the present invention, the housing 220 and the gear box 310 are in communication with each other to share cooling lubricant.
[0045] Specifically, the first gear 321 and the second gear 322 need to be lubricated by cooling lubricant during operation, so as to improve the smoothness of the meshing transmission of the first gear 321 and the second gear 322. At the same time, the generator assembly 200 needs to be cooled due to heat during operation. To this end, in this embodiment, the housing 220 and the gear box 310 are connected, and the cooling lubricant of the gear box 310 can flow into the housing 220. When the engine 100 and the generator assembly 200 are working, the second gear 322 and the rotor 210 will stir the cooling lubricant, so that the cooling lubricant splashes onto the stator or the rotor 210 or the inner wall of the housing 220. While achieving lubrication of the first gear 321 and the second gear 322, the stator or the housing 220 can be cooled, and the overall structure is simpler, further reducing the production cost.
[0046] For example, refer to Figure 1 In one embodiment of the utility model, the gear box 310 is provided with a first opening, and the housing 220 is provided with a second opening, and the second opening is arranged corresponding to the first opening; the gear box 310 has a first bottom wall 311, and the housing 220 has a second bottom wall 221, the first bottom wall 311 is lower than the second bottom wall 221, and the second bottom wall 221 is not lower than the second opening.
[0047] Specifically, the lubrication requirements of the first gear 321 and the second gear 322 are greater than the heat dissipation requirements of the stator or the rotor 210, and it is necessary to ensure that there is cooling lubricant in the gear box 310 to lubricate the first gear 321 and the second gear 322. To this end, in this embodiment, the first bottom wall 311 is lower than the second bottom wall 221, and the second bottom wall 221 is not lower than the second opening, and the cooling lubricant can flow from the housing 220 to the gear box 310, thereby ensuring that there is always cooling lubricant in the gear box 310, so that the first gear 321 and the second gear 322 can be lubricated.
[0048] For example, refer to Figure 1 In one embodiment of the utility model, the housing 220 is further provided with a disassembly opening, which is arranged opposite to the second opening, and the disassembly opening is detachably provided with an end cover to open or close the disassembly opening.
[0049] Specifically, the disassembly port can be opened through the detachable end cover to facilitate adding cooling lubricant. In one embodiment, the end cover can be detachably connected to the housing 220 by bolts or a buckle structure.
[0050] To achieve the above purpose, the embodiment of the utility model provides a car, which includes the range extender assembly described above. Specifically, the specific structure of the range extender assembly refers to the above embodiment. Since the car adopts all the technical solutions of the above embodiment, it at least has all the beneficial effects brought by the technical solutions of the above embodiment, which will not be repeated here.
[0051] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the embodiment of the present invention. All equivalent structural changes made by using the description and drawings of the embodiment of the present invention under the inventive concept of the embodiment of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the embodiment of the present invention.
Claims
1. A range extender assembly, characterized in that: The range extender assembly comprises: an engine having a crankshaft; A generator assembly, the generator assembly comprising a rotor and a stator which are separately arranged, the stator being fixedly connected to the engine; and The speed increasing mechanism is arranged between the crankshaft and the rotor. The crankshaft and the rotor are connected through the speed increasing mechanism. The rotor is suspended inside the stator through the speed increasing mechanism.
2. The range extender assembly according to claim 1, characterized in that: The speed increasing mechanism includes a gearbox and a speed increasing gear set arranged in the gearbox, the gearbox is connected to the engine, the speed increasing gear set is connected to the crankshaft and the rotor, the generator assembly also includes a housing connected to the gearbox, the stator and the rotor are arranged inside the housing, and the stator is fixedly connected to the housing.
3. The range extender assembly according to claim 2, characterized in that: The speed increasing gear set includes a first gear and a second gear which are meshed and connected, wherein the first gear is connected to the crankshaft, and the second gear is connected to the rotor, and the first gear and the second gear are rotatably arranged in the gear box, wherein the number of teeth of the first gear is greater than the number of teeth of the second gear.
4. The range extender assembly according to claim 3, characterized in that: The first gear is detachably connected to the crankshaft; and / or the second gear is detachably connected to the rotor.
5. The range extender assembly according to claim 3, characterized in that: The first gear is integrally arranged with the crankshaft; and / or the second gear is integrally arranged with the rotor.
6. The range extender assembly according to claim 3, characterized in that: The speed increasing gear set further comprises a support bearing, wherein the support bearing is arranged inside the gear box, and the second gear is rotatably arranged inside the gear box via the support bearing.
7. The range extender assembly according to claim 2, characterized in that: The housing and the gear box are in communication to share a cooling lubricant.
8. The range extender assembly according to claim 7, characterized in that: The gear box is provided with a first opening, and the housing is provided with a second opening, and the second opening is arranged corresponding to the first opening; the gear box has a first bottom wall, and the housing has a second bottom wall, the first bottom wall is lower than the second bottom wall, and the second bottom wall is not lower than the second opening.
9. The range extender assembly according to claim 8, characterized in that: The housing is also provided with a disassembly opening, which is arranged opposite to the second opening. The disassembly opening is detachably provided with an end cover to open or close the disassembly opening.
10. An automobile, characterized in that: The automobile comprises the range extender assembly as described in any one of claims 1-9.