Range extender and electric vehicle

Abstract

The utility model discloses a range extender and an electric vehicle, the range extender comprises an engine cylinder body and a chain wheel chamber shell, the engine cylinder body is fixedly connected with the chain wheel chamber shell, the engine cylinder body and the chain wheel chamber shell jointly define a chain wheel mounting chamber, and the engine cylinder body is provided with a crankshaft of an engine; and the vibration reduction wheel is arranged in the chain wheel mounting chamber, and the vibration reduction wheel and the crankshaft are fixed. By fixing the vibration reduction wheel and the crankshaft, the torque of the crankshaft can be changed, the energy loss of the range extender is reduced, the vibration reduction wheel is arranged in the chain wheel mounting chamber, the NVH performance of a vehicle can be improved, the size of the range extender can be reduced, and the whole vehicle arrangement and the lightweight design of the vehicle are facilitated.

Description

Technical Field

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

[0002] In the prior art, the damping wheel of existing range extenders is externally mounted, resulting in a large design and unfavorable overall vehicle layout. Furthermore, the rotation of the damping wheel generates operating noise, which is detrimental to the vehicle's NVH (Noise, Vibration, Harshness) performance. Furthermore, the external damping wheel requires an oil seal and transmission structure, resulting in high manufacturing costs. Furthermore, the range extender's mechanical pump is connected to the engine's crankshaft, which drives the pump, increasing the range extender's fuel consumption. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a range extender that can reduce the size of the range extender and improve the NVH performance of the vehicle.

[0004] The utility model further provides a vehicle.

[0005] According to an embodiment of the present utility model, the range extender includes: an engine cylinder block and a sprocket chamber housing, the engine cylinder block and the sprocket chamber housing are fixedly connected, the engine cylinder block and the sprocket chamber housing jointly define a sprocket mounting chamber, the engine cylinder block is provided with an engine crankshaft; a vibration damping wheel, the vibration damping wheel is provided in the sprocket mounting chamber, and the vibration damping wheel and the crankshaft are fixed.

[0006] The range extender of this embodiment of the utility model, by fixing the damping wheel to the crankshaft, can change the crankshaft torque and reduce energy loss in the range extender. The damping wheel is placed in the sprocket mounting chamber, isolating noise along the transmission path, which helps improve the vehicle's NVH performance and can also reduce the size of the range extender, facilitating overall vehicle layout and lightweight design.

[0007] In some embodiments of the present invention, the range extender further includes: a fastener, which is passed through the damping wheel and fixedly connected to the crankshaft.

[0008] In some embodiments of the present invention, the damping wheel has a through hole, the crankshaft has a mounting hole, the fastener is passed through the through hole, and the fastener is fixedly installed in the mounting hole.

[0009] In some embodiments of the present invention, the fastener has a rod and a head, one end of the rod is connected to the head, the rod is passed through the through hole and installed in the installation hole, and the head abuts against the surface of the damping wheel away from the crankshaft.

[0010] In some embodiments of the present invention, a surface of the damping wheel facing away from the crankshaft has an assembly groove, the assembly groove is arranged around the through hole, and the head is assembled in the assembly groove.

[0011] In some embodiments of the present invention, the range extender further includes: a crankshaft sprocket, which is located between the damping wheel and the crankshaft, and a fastener is also passed through the crankshaft sprocket to fix the damping wheel, the crankshaft sprocket and the crankshaft.

[0012] In some embodiments of the present invention, the engine cylinder block has a crankshaft installation space, the crankshaft installation space is adjacent to and communicates with the sprocket installation chamber, and the crankshaft is installed in the crankshaft installation space.

[0013] In some embodiments of the present invention, the range extender further includes: an electric drive pump, which is disposed in the engine cylinder block and is used to drive the coolant to flow to dissipate heat from the engine.

[0014] In some embodiments of the present invention, the sprocket chamber housing includes a shell body and a mounting flange, the mounting flange is connected to the lower end of the shell body, the shell body is fixedly connected to the engine cylinder block to define a sprocket mounting chamber, the mounting flange is used to install the oil pan, and a reinforcing rib is formed on the outer surface of the shell body facing away from the engine cylinder block, and the reinforcing rib is connected to the mounting flange.

[0015] In some embodiments of the present invention, an avoidance groove structure is formed on the surface of the shell body facing away from the engine cylinder block.

[0016] A vehicle according to an embodiment of the present invention includes the above-mentioned range extender.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 Schematic diagram of an explosion of a range extender according to an embodiment of the present utility model.

[0020] Reference numerals:

[0021] Range extender 100;

[0022] Engine block 1;

[0023] Crankshaft installation space 11;

[0024] Sprocket housing 2;

[0025] Shell body 21; reinforcing rib 211; avoidance groove structure 212; installation flange 22;

[0026] Sprocket installation chamber 3;

[0027] Crankshaft 4;

[0028] Crank 41; connecting rod 42; mounting hole 43;

[0029] Vibration damping wheel 5;

[0030] Through hole 51; Assembly groove 52;

[0031] Fastener 6;

[0032] Rod 61; Head 62;

[0033] Crankshaft sprocket 7;

[0034] The pump 8 is electrically driven. DETAILED DESCRIPTION

[0035] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0036] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0038] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or mutual communication; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.

[0039] Reference below Figure 1 A range extender 100 according to an embodiment of the present invention is described.

[0040] like Figure 1 As shown, the range extender 100 according to an embodiment of the present utility model includes: an engine cylinder block 1 and a sprocket housing 2, the engine cylinder block 1 and the sprocket housing 2 are fixedly connected, the engine cylinder block 1 and the sprocket housing 2 jointly define a sprocket mounting chamber 3, the engine cylinder block 1 is provided with an engine crankshaft 4; a vibration damping wheel 5, the vibration damping wheel 5 is provided in the sprocket mounting chamber 3, and the vibration damping wheel 5 and the crankshaft 4 are fixed.

[0041] The engine block 1 and the sprocket housing 2 are arranged relative to each other, and the engine block 1 and the sprocket housing 2 are fixedly connected to define a sprocket mounting chamber 3, in which other components can be assembled. The crankshaft 4 can include a crank 41 and a connecting rod 42. The crank 41 can convert reciprocating motion into rotational motion, and the connecting rod 42 connects multiple cranks 41 together. The crankshaft 4 can convert chemical energy into mechanical energy, thereby achieving the effect of driving the vehicle to move. The crankshaft 4 can be arranged in the engine block 1, and the crankshaft 4 can rotate stably in the engine block 1, which is beneficial to the continuity of the vehicle's movement and thus improves the safety of the vehicle's operation. The range extender 100 can also include a damping wheel 5. The damping wheel 5 can effectively reduce the vibration of the crankshaft 4, thereby reducing the impact of the vibration of the crankshaft 4 on other components in the range extender 100, improving the working stability and reliability of the range extender 100, and thus extending the service life of the range extender 100. The damping wheel 5 is installed in the sprocket mounting chamber 3. The working noise of the damping wheel 5 is located in the sprocket mounting chamber 3, which isolates the noise in the transmission path, which is beneficial to improving the NVH performance of the vehicle. It can also reduce the size of the range extender 100, which is beneficial to the overall vehicle layout and lightweight design of the vehicle. In addition, by arranging the damping wheel 5 in the sprocket mounting chamber 3, the oil seal structure on the sprocket chamber housing 2 can be eliminated, and the processing accuracy of the sprocket chamber housing 2 can be appropriately reduced, thereby reducing the production cost of the range extender 100, which is beneficial to the low-cost design of the vehicle.

[0042] Therefore, by arranging the vibration-damping wheel 5 in the sprocket mounting chamber 3, the noise is isolated in the transmission path, and the working noise in the sprocket mounting chamber 3 is isolated, which is beneficial to improving the NVH performance of the vehicle and can also reduce the size of the range extender 100, which is beneficial to the overall vehicle layout and lightweight design of the vehicle.

[0043] In some embodiments of the present invention, Figure 1 As shown, the range extender 100 may further include: a fastener 6 , which is passed through the damping wheel 5 and fixedly connected to the crankshaft 4 .

[0044] Among them, the fastener 6 is used to connect the vibration damping wheel 5 and the crankshaft 4. Specifically, the fastener 6 can be passed through the vibration damping wheel 5, and the fastener 6 is fixedly assembled with the crankshaft 4. For example, the fastener 6 can have an external thread, and the crankshaft 4 can have an internal thread. The fastener 6 and the crankshaft 4 can be threaded together, but the present application is not limited to this. The fastener 6 and the crankshaft 4 can also be connected in other ways, as long as the fastener 6 and the crankshaft 4 are fixedly connected, so that the vibration damping wheel 5 and the crankshaft 4 are fixedly connected through the fastener 6. The vibration damping wheel 5 and the crankshaft 4 are fixedly connected, which is beneficial for the vibration damping wheel 5 to reduce the vibration and noise generated by the operation of the crankshaft 4, thereby improving the NVH performance of the vehicle.

[0045] In some embodiments of the present invention, Figure 1 As shown, the damping wheel 5 has a through hole 51 , the crankshaft 4 has a mounting hole 43 , the fastener 6 is passed through the through hole 51 , and the fastener 6 is fixedly installed in the mounting hole 43 .

[0046] Among them, the vibration damping wheel 5 can have a through hole 51, and the crankshaft 4 can have a mounting hole 43. The shapes of the through hole 51 and the mounting hole 43 are adapted to the shape of the peripheral wall of the fastener 6. Such a setting is conducive to the fastener 6 passing through the through hole 51 and fixedly installed in the mounting hole 43, thereby improving the connection reliability between the vibration damping wheel 5 and the crankshaft 4, reducing the risk of separation of the vibration damping wheel 5 and the crankshaft 4 due to unstable assembly of the fastener 6, further reducing the vibration and noise generated by the crankshaft 4, and further improving the NVH performance of the vehicle.

[0047] In some embodiments of the present invention, Figure 1 As shown, the fastener 6 has a rod 61 and a head 62 , one end of the rod 61 is connected to the head 62 , the rod 61 is passed through the through hole 51 and installed in the mounting hole 43 , and the head 62 abuts against the surface of the damping wheel 5 facing away from the crankshaft 4 .

[0048] Among them, the fastener 6 can have a rod 61 and a head 62, one end of the rod 61 can be connected to the head 62, one end of the rod 61 and the head 62 can be connected by welding, and one end of the rod 61 and the head 62 can also be integrally formed, but the present application is not limited to this. One end of the rod 61 and the head 62 can also be connected in other ways, as long as one end of the rod 61 is fixedly connected to the head 62, and the other end of the rod 61 can be fixedly installed in the mounting hole 43, the rod 61 is passed through the through hole 51 and installed in the mounting hole 43, and the head 62 abuts against the surface of the vibration damping wheel 5 away from the crankshaft 4 to achieve the effect of limiting the vibration damping wheel 5, reducing the movement of the vibration damping wheel 5 in the direction away from the crankshaft 4, which is beneficial to further improve the connection reliability between the vibration damping wheel 5 and the crankshaft 4, reduce the risk of separation of the vibration damping wheel 5 and the crankshaft 4 due to unstable assembly of the fastener 6, further reduce the vibration and noise generated by the crankshaft 4, and thus further improve the NVH performance of the vehicle.

[0049] In some embodiments of the present invention, Figure 1 As shown, the surface of the damping wheel 5 facing away from the crankshaft 4 has a mounting groove 52 . The mounting groove 52 is arranged around the through hole 51 , and the head 62 is mounted in the mounting groove 52 .

[0050] Among them, the surface of the vibration damping wheel 5 facing away from the crankshaft 4 has an assembly groove 52 recessed into the vibration damping wheel 5. The assembly groove 52 can be arranged around the through hole 51. The assembly groove 52 can be set at the center of the vibration damping wheel 5, and the head 62 is assembled in the assembly groove 52. Such an arrangement can limit the vibration damping wheel 5, reduce the risk of shaking of the vibration damping wheel 5, improve the stability of the vibration damping wheel 5, enable the vibration damping wheel 5 to stably play a vibration damping role, further reduce the vibration and noise generated by the crankshaft 4, and further improve the NVH performance of the vehicle. In addition, by setting the assembly groove 52, the weight of the vibration damping wheel 5 can also be reduced, which is more conducive to the lightweight design of the vibration damping wheel 5.

[0051] In some embodiments of the present invention, Figure 1 As shown, the range extender 100 may further include: a crankshaft sprocket 7, which is located between the damping wheel 5 and the crankshaft 4, and a fastener 6 is also passed through the crankshaft sprocket 7 to fix the damping wheel 5, the crankshaft sprocket 7 and the crankshaft 4.

[0052] Among them, the crankshaft sprocket 7 can control the vehicle starting time. The crankshaft sprocket 7 is located between the vibration damping wheel 5 and the crankshaft 4. The fastener 6 is also passed through the crankshaft sprocket 7. Specifically, the fastener 6 is respectively passed through the vibration damping wheel 5 and the crankshaft sprocket 7 in sequence, and then fixedly connected to the crankshaft 4 to fix the vibration damping wheel 5, the crankshaft sprocket 7 and the crankshaft 4, which is beneficial to the working stability of the crankshaft sprocket 7 and thus conducive to the smooth starting of the vehicle.

[0053] In some embodiments of the present invention, Figure 1As shown, the engine block 1 has a crankshaft installation space 11 , which is adjacent to and communicates with the sprocket installation chamber 3 , and the crankshaft 4 is installed in the crankshaft installation space 11 .

[0054] The engine block 1 may be provided with a crankshaft mounting space 11 for mounting a crankshaft 4, which provides kinetic energy for the vehicle. Mounting the crankshaft 4 in the crankshaft mounting space 11 facilitates the stable driving of the crankshaft 4 within the crankshaft mounting space 11, thereby facilitating the continuity of vehicle motion and thereby improving vehicle safety. The crankshaft mounting space 11 is adjacent to the sprocket mounting chamber 3 and is in communication with the sprocket mounting chamber 3, thereby reducing the risk of outward transmission of operating noise from the crankshaft 4 and further improving the vehicle's NVH performance.

[0055] In some embodiments of the present invention, Figure 1 As shown, the range extender 100 may further include: an electric drive pump 8, which is provided in the engine cylinder block 1 and is used to drive the coolant to flow to dissipate heat from the engine.

[0056] The electrically driven pump 8 can provide cooling medium based on the engine's heat dissipation requirements. By driving the coolant flow through the electrically driven pump 8 to dissipate heat from the engine, this helps reduce vehicle energy loss, improves the engine's heat dissipation efficiency, and thus reduces fuel consumption. The electrically driven pump 8 can be driven electrically, eliminating the need for crankshaft 4 to operate the electrically driven pump 8. This reduces fuel consumption and, consequently, operating costs of the range extender 100.

[0057] In some embodiments of the present invention, Figure 1 As shown, the sprocket chamber housing 2 includes a housing body 21 and a mounting flange 22. The mounting flange 22 is connected to the lower end of the housing body 21. The housing body 21 is fixedly connected to the engine cylinder block 1 to define a sprocket mounting chamber 3. The mounting flange 22 is used to install the oil pan (not shown in the figure). A reinforcing rib 211 is formed on the outer surface of the housing body 21 facing away from the engine cylinder block 1, and the reinforcing rib 211 is connected to the mounting flange 22.

[0058] Among them, the sprocket chamber case 2 includes a shell body 21 and an installation flange 22, and the installation flange 22 is connected to the lower end of the shell body 21. For example, the installation flange 22 and the lower end of the shell body 21 can be welded, and the installation flange 22 and the lower end of the shell body 21 can also be connected by bolts, but the present application is not limited to this. The installation flange 22 and the lower end of the shell body 21 can also be connected by other means, as long as the installation flange 22 is connected to the lower end of the shell body 21. The present application takes the welding connection of the installation flange 22 and the lower end of the shell body 21 as an example to illustrate, which is beneficial to improve the connection reliability of the installation flange 22 and the shell body 21, thereby improving the structural stability of the sprocket chamber case 2.

[0059] The shell body 21 is fixedly connected to the engine block 1 to define a sprocket mounting chamber 3, in which other components can be assembled. The mounting flange 22 is used to mount the oil pan (not shown in the figure). The mounting flange 22 and the oil pan can form a good seal, further reducing the risk of oil leakage of the range extender 100. The outer surface of the shell body 21 facing away from the engine block 1 is formed with a reinforcing rib 211, which is connected to the mounting flange 22. The reinforcing rib 211 is connected between the outer surface of the shell body 21 facing away from the engine block 1 and the mounting flange 22, further improving the connection reliability between the mounting flange 22 and the shell body 21, thereby further improving the structural stability of the sprocket chamber shell 2.

[0060] In some embodiments of the present invention, Figure 1 As shown, an avoidance groove structure 212 is formed on the surface of the shell body 21 facing away from the engine cylinder block 1 .

[0061] The surface of the housing 21 facing away from the engine block 1 may be formed with an escape groove structure 212. The escape groove structure 212 is used to avoid other components, reducing the risk of interference between the range extender 100 and other components, thereby improving the adaptability of the range extender 100. Furthermore, a reinforcement structure may be formed within the escape groove structure 212 to reduce the risk of the escape groove 212 collapsing under stress, thereby improving the structural stability of the range extender 100.

[0062] In some embodiments of the present invention, Figure 1 As shown, the sprocket housing 2 is made by die casting.

[0063] The sprocket housing 2 can be integrally formed using a die-casting process, which can better isolate noise from the interior of the sprocket mounting chamber 3 and improve the vehicle's NVH performance. This also helps improve the structural stability of the sprocket housing 2, reduce the risk of cracking, and increase the service life of the sprocket housing 2, thereby improving the operating reliability of the range extender 100. The integral die-casting of the sprocket housing 2 can also reduce subsequent processing steps, reduce the number of molds, and lower the production cost of the sprocket housing 2, thereby reducing the production cost of the range extender 100 and improving the economic efficiency of the vehicle.

[0064] It should be noted that the damper wheel 5 is disposed within the sprocket housing 2 and operates in the lubricating oil environment within the sprocket housing 2, eliminating the need for additional rust prevention treatment. This eliminates the need for an oil seal on the sprocket housing 2, thereby reducing the risk of oil leakage at the front end of the engine. The sprocket housing 2 is designed without an oil seal and is integrally formed by a die-casting process, which appropriately reduces the machining accuracy of the sprocket housing 2 and improves its modal design. This, in turn, reduces the production cost of the range extender 100, contributing to a low-cost design for the vehicle.

[0065] A vehicle according to an embodiment of the present invention includes the aforementioned range extender 100. By locating the damping wheel 5 within the sprocket mounting chamber 3, noise is isolated along the transmission path, isolating the operating noise within the sprocket mounting chamber 3. This improves the vehicle's NVH performance and reduces the size of the range extender 100, facilitating overall vehicle layout and lightweight design.

[0066] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0067] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A range extender (100), characterized in that: include: An engine cylinder block (1) and a sprocket housing (2), wherein the engine cylinder block (1) and the sprocket housing (2) are fixedly connected, the engine cylinder block (1) and the sprocket housing (2) jointly define a sprocket mounting chamber (3), and the engine cylinder block (1) is provided with an engine crankshaft (4); A vibration-damping wheel (5) is arranged in the sprocket installation chamber (3), and the vibration-damping wheel (5) and the crankshaft (4) are fixed.

2. The range extender (100) according to claim 1, characterized in that: Also includes: A fastener (6), wherein the fastener (6) is passed through the vibration-damping wheel (5) and is fixedly connected to the crankshaft (4).

3. The range extender (100) according to claim 2, characterized in that: The vibration-damping wheel (5) has a through hole (51), the crankshaft (4) has a mounting hole (43), the fastener (6) is passed through the through hole (51), and the fastener (6) is fixedly mounted in the mounting hole (43).

4. The range extender (100) according to claim 3, characterized in that: The fastener (6) comprises a rod (61) and a head (62), one end of the rod (61) is connected to the head (62), the rod (61) is passed through the through hole (51) and installed in the installation hole (43), and the head (62) abuts against a surface of the damping wheel (5) facing away from the crankshaft (4).

5. The range extender (100) according to claim 4, characterized in that: The surface of the vibration-damping wheel (5) facing away from the crankshaft (4) has an assembly groove (52), the assembly groove (52) is arranged around the through hole (51), and the head (62) is assembled in the assembly groove (52).

6. The range extender (100) according to claim 2, characterized in that: Also includes: A crankshaft (4) sprocket is located between the damping wheel (5) and the crankshaft (4), and the fastener (6) is also passed through the crankshaft (4) sprocket to fix the damping wheel (5), the crankshaft (4) sprocket and the crankshaft (4).

7. The range extender (100) according to claim 1, characterized in that: The engine cylinder block (1) has a crankshaft (4) installation space (11), the crankshaft (4) installation space (11) is adjacent to and communicates with the sprocket installation chamber (3), and the crankshaft (4) is installed in the crankshaft (4) installation space (11).

8. The range extender (100) according to any one of claims 1 to 7, characterized in that: Also includes: An electric drive pump (8) is provided on the engine cylinder block (1), and is used for driving the flow of coolant to dissipate heat from the engine.

9. The range extender (100) according to any one of claims 1 to 7, characterized in that: The sprocket chamber housing (2) comprises a housing body (21) and a mounting flange (22), wherein the mounting flange (22) is connected to the lower end of the housing body (21), the housing body (21) is fixedly connected to the engine cylinder block (1) to define the sprocket mounting chamber (3), the mounting flange (22) is used to mount the oil pan, and a reinforcing rib (211) is formed on the outer surface of the housing body (21) facing away from the engine cylinder block (1), and the reinforcing rib (211) is connected to the mounting flange (22).

10. The range extender (100) according to claim 9, characterized in that: A surface of the shell body (21) facing away from the engine cylinder block (1) is formed with an avoidance groove (212) structure.

11. An electric vehicle, characterized in that: It comprises a range extender (100) according to any one of claims 1 to 10.

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