Oil pan and range extending system
By integrating the generator's cooling oil reservoir into the oil pan, the complex connection problem caused by separating the oil pan from the generator housing is solved, achieving a compact design of the engine system, reducing assembly difficulty and maintenance costs, and optimizing space utilization.
Patent Information
- Application Number
- CN202520344007.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2035-02-28
AI Technical Summary
In traditional engine design, the oil pan and generator housing are set up separately, which leads to a complex connection structure, increases assembly difficulty and maintenance costs, and is not conducive to space layout optimization.
The generator's cooling oil reservoir is integrated into the oil pan, forming an integrated lubricating oil and cooling oil containment area, which is separated by a partition. The oil filter and drain bolt structure are also integrated, simplifying the connection method.
It improves the structural compactness of the oil pan, reduces the number of parts and connection points, lowers the probability of failure and maintenance costs, optimizes the spatial layout, reduces weight and saves costs.
Smart Images
Figure CN223578010U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of oil sump, in particular to an oil sump and a range extending system. BACKGROUND
[0002] In the field of modern mechanical equipment, especially automobiles and engineering machinery, the engine as the core power component, its structure design and performance optimization have been the focus of research and development. The oil sump and the generator as important components of the engine system play a key role in the normal operation of the engine.
[0003] In traditional engine design, in order to meet the functional requirements of different components and facilitate production and manufacturing, the oil sump and the generator shell are usually set separately. The oil sump is mainly used for storing engine lubricating oil, and at the same time plays a certain protective role for the crankshaft and other components of the engine; while the generator converts the mechanical energy of the engine into electrical energy through electromagnetic induction principle, providing power support for the electrical system of the vehicle. The oil sump and the generator shell are independent, but in the subsequent assembly process, the two need to be connected to ensure the stability and functionality of the entire engine system. This results in more overall connection structure, not only increases the complexity and difficulty of assembly, prolongs the assembly time, and the complex connection structure is not conducive to maintenance and troubleshooting, which increases the labor cost and error probability in the production process. SUMMARY
[0004] Therefore, an oil sump and a range extending system are provided to solve the problem of high installation parts, assembly and maintenance cost caused by the complex connection structure of the oil sump and the generator in the prior art.
[0005] On the one hand, the utility model provides an oil sump for use in a range extending system, the oil sump comprising:
[0006] a lubricating oil containing part, the lubricating oil containing part being concave, and the lubricating oil containing part being a concave cavity structure with only the top surface being open;
[0007] a cooling oil containing part, the cooling oil containing part being concave, and the top surface and the side surface of the cooling oil containing part being open;
[0008] a partition part, the partition part dividing the concave structure of the oil sump into the lubricating oil containing part and the cooling oil containing part which are adjacent and not connected;
[0009] a first mounting surface, the first mounting surface being used for connecting to a cylinder head body, and the first mounting surface being formed on the top surface of the oil sump;
[0010] a second mounting surface, the second mounting surface being used for connecting to a motor oil pump, and the second mounting surface being formed on the side surface of the cooling oil containing part.
[0011] On the basis of the above technical solutions, the utility model further can make improvement as follows.
[0012] In one of the implementation manners, the oil pan further comprises:
[0013] The oil filter mounting portion is connected to the side of the lubricating oil containing portion opposite to the first mounting face.
[0014] In one of the implementation manners, the oil pan further comprises:
[0015] The oil changing portion is located in the lubricating oil containing portion, and the top face of the oil changing portion is lower than the first mounting face;
[0016] The two oil changing holes are both opened downward along the top face of the oil changing portion, and the oil changing holes are used for oil exchange between the oil filter and the lubricating oil containing portion; one oil changing hole is used for oil inlet of the oil filter, and the other oil changing hole is used for oil outlet of the oil filter.
[0017] In one of the implementation manners, the oil pan further comprises:
[0018] The first oil drain bolt is detachably mounted at the bottom of the lubricating oil containing portion;
[0019] The second oil drain bolt is detachably mounted at the bottom of the cooling oil containing portion;
[0020] The head of the first oil drain bolt and the head of the second oil drain bolt are both located outside the outer wall of the corresponding containing portion.
[0021] In one of the implementation manners, the lubricating oil containing portion and the cooling oil containing portion are adjacently arranged along the length direction of the oil pan, the width of the lubricating oil containing portion is smaller than that of the cooling oil containing portion, and the length of the lubricating oil containing portion is greater than that of the cooling oil containing portion;
[0022] The separation portion comprises:
[0023] The sealing face is obliquely arranged and used for abutting against the corresponding sealing structure of the cylinder block;
[0024] The rear oil seal mounting hole has at least two, and the rear oil seal mounting hole is arranged on the sealing face.
[0025] In one of the implementation manners, the oil pan further comprises:
[0026] The stator mounting portion is located in the cooling oil containing portion, and the stator mounting portion is in a columnar shape and protrudes in the direction opposite to the lubricating oil containing portion.
[0027] In one of the implementation manners, the oil pan further comprises:
[0028] A rear suspension mounting portion is provided on the outer wall of the bottom of the cooling oil accommodating portion, and has at least two mounting holes.
[0029] In one of the implementations, the first mounting surface is in a U shape and is located on the top surface of the oil pan, the lower part of the U shape of the first mounting surface is the lubricating oil accommodating portion, and the upper part of the U shape of the first mounting surface is the cooling oil accommodating portion.
[0030] The oil pan further comprises:
[0031] Connecting holes are provided on the first mounting surface and the second mounting surface for mounting of the oil pan, and a plurality of connecting holes are provided on each of the first mounting surface and the second mounting surface.
[0032] In another aspect, the utility model also provides a range increasing system, and in one of the implementations, the range increasing system comprises the oil pan.
[0033] The utility model has the advantages of:
[0034] The lubricating oil accommodating portion is used for accommodating lubricating oil and serving as an oil storage tank of a generator lubricating system, and the cooling oil accommodating portion is used for accommodating cooling oil and serving as an oil storage tank of a generator cooling system, that is, the oil pan of the utility model also integrates a shell of the generator, the tank wall of the cooling oil storage tank of the generator is integrated on the oil pan, the structural compactness of the oil pan is effectively improved, the space occupation is saved, the space layout of the automobile power compartment is optimized, the installation of the engine and related components is more compact and reasonable, more space is left for other components, the number of parts and connection points are effectively reduced, the probability of failure and maintenance cost are reduced; the shell of the generator is integrated on the cylinder block and the oil pan of the engine in the scheme, the number of parts is reduced, the cost is saved, the weight of the assembly is reduced, oil consumption and electricity consumption are reduced, and the structure is more compact. BRIEF DESCRIPTION OF DRAWINGS
[0035] Figure 1 FIG. 1 is a structural schematic diagram of an oil pan in one embodiment;
[0036] Figure 2 FIG. 2 is a structural schematic diagram of an oil pan in another embodiment;
[0037] Figure 3 FIG. 3 is a structural schematic diagram of an oil pan in still another embodiment.
[0038] In the drawings, the components represented by the respective reference numerals are as follows:
[0039] 1, lubricating oil accommodating portion; 2, cooling oil accommodating portion;
[0040] 3, partition portion; 3-1, sealing surface; 3-2, rear oil seal mounting hole;
[0041] 4, first mounting surface; 5, second mounting surface; 6, oil filter mounting portion; 7, oil changing portion; 8, oil changing hole; 9, first oil drain bolt; 10, second oil drain bolt; 11, stator mounting portion; 12, rear suspension mounting portion; 13, connecting hole. DETAILED DESCRIPTION
[0042] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and not to limit the present application. It should be noted that the diagrams provided in the present embodiment only schematically illustrate the basic concept of the present application, and therefore the drawings only show the components related to the present application, not the components number, shape and size when actually implemented. The shape, number and proportion of each component can be arbitrarily changed when actually implemented, and the component layout form can also be more complex.
[0043] The terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified.
[0044] Since the oil pan and the generator are independently arranged in the prior art, the function of the motor end is single, the number of parts is large, the cost is high, and the space occupied is large. Specifically, when the oil pan and the generator are assembled together subsequently, due to the large number of connection structures between the two, the assembly complexity is high, the assembly difficulty is high, thereby prolonging the assembly time, which is not conducive to subsequent re-inspection and troubleshooting, reduces the operation efficiency, and increases the labor cost.
[0045] In a first aspect, the present application provides:
[0046] An oil pan, referring to Figure 1 and Figure 3 , used in an extended range system, the oil pan comprising a lubricating oil containing portion 1, a cooling oil containing portion 2, a partition portion 3, a first mounting surface 4 and a second mounting surface 5, the lubricating oil containing portion 1 is concave, and the lubricating oil containing portion 1 is a concave cavity structure with only the top surface open; the cooling oil containing portion 2 is concave, and the top surface and the side surface of the cooling oil containing portion 2 are open; the partition portion 3 divides the concave structure of the oil pan into adjacent and non-communicating lubricating oil containing portion 1 and cooling oil containing portion 2; the first mounting surface 4 is used to be connected to the cylinder head body, and the first mounting surface 4 is formed on the top surface of the oil pan; the second mounting surface 5 is used to be connected to the motor oil pump, and the second mounting surface 5 is formed on the side surface of the cooling oil containing portion 2.
[0047] With the scheme, the lubricating oil containing part 1 is used to contain lubricating oil and as a storage tank of a generator lubricating system, and the cooling oil containing part 2 is used to contain cooling oil and as a storage tank of a generator cooling system, that is, the oil pan of the application also integrates the shell of the generator, the tank wall of the cooling oil storage tank of the generator is integrated on the oil pan, which effectively improves the compactness of the oil pan, saves the space occupation, optimizes the space layout of the automobile power compartment, makes the installation of the engine and related parts more compact and reasonable, leaves more space for other parts, and also effectively reduces the number of parts and connection points, reduces the probability of failure and maintenance cost; the scheme integrates the shell of the generator on the cylinder block and the oil pan of the engine, which can reduce the number of parts, save costs, reduce the weight of the assembly, reduce oil consumption and electricity consumption, and make the structure more compact.
[0048] In the embodiment, the partition part 3 has a separating effect on the lubricating oil containing part 1 and the cooling oil containing part 2, avoiding the communication of the two storage tanks.
[0049] In some embodiments, referring to Figure 2 , the oil pan further comprises an oil filter mounting part 6, which is connected to the side of the lubricating oil containing part 1 away from the first mounting face 4. In this way, the oil filter mounting part 6 is integrated on the oil pan, which facilitates the installation and connection of the oil filter with the oil pan, thereby facilitating the oil filter to process the lubricating oil in the oil pan; and effectively improves the integration of the oil pan.
[0050] In other embodiments, the oil filter mounting part 6 is in the form of a hollow cylinder, and the axis of the cylindrical structure is perpendicular to the first mounting face 4. There are various connection forms between the oil filter and the oil pan, which can be that the inner wall or outer wall of the hollow cylindrical structure is provided with threads, and the oil filter is provided with external threads or internal threads matched with the threads, so as to realize the tight connection between the oil filter and the oil pan through the thread structure, facilitate the installation and disassembly of the oil filter, and at the same time ensure the sealing of the oil filter and the oil pan through the thread structure; a sealing ring or other sealing structure is arranged at the connection position of the oil filter and the oil pan, so as to achieve better sealing at the connection position of the oil filter and the oil pan by extruding the sealing ring; in addition, a positioning structure formed by corresponding protrusions or grooves can be arranged at the connection position of the oil filter and the oil pan, so as to ensure the installation of the oil filter and the oil pan in place, and also facilitate the quick positioning of the oil filter and the oil pan, thereby improving the installation efficiency.
[0051] In some embodiments, referring to Figure 1 and Figure 3The oil sump further comprises an oil changing part 7 and two oil changing holes 8, the oil changing part 7 is located in the lubricating oil containing part 1, and the top surface of the oil changing part 7 is lower than the first mounting surface 4. In this way, since the first mounting surface 4 is a structure connected with the cylinder head body, the oil changing part 7 is arranged lower than the first mounting surface 4, so that the oil changing part 7 is in contact with the lubricating oil in the lubricating oil containing part 1, thereby facilitating the oil exchange between the oil filter and the lubricating oil in the lubricating oil containing part 1.
[0052] The two oil changing holes 8 are both arranged along the top surface of the oil changing part 7 and downwardly, the oil changing holes 8 are used for the oil exchange between the oil filter and the lubricating oil containing part 1, one oil changing hole 8 is used for the oil inlet of the oil filter, and the other oil changing hole 8 is used for the oil outlet of the oil filter. In this way, the two oil changing holes 8 are both connected with the oil filter, and the oil changing holes 8 are arranged on the oil changing part 7, so that one end of the oil changing hole 8 is in full contact with the lubricating oil, and the other end of the oil changing hole 8 extends to be connected with the oil filter, thereby realizing the communication between the oil filter and the lubricating oil through the oil changing hole 8. Therefore, when the two oil changing holes 8 are arranged, the oil filter can enter oil through one oil changing hole 8 and outlet oil through the other oil changing hole 8, thereby facilitating the oil filter to act on the lubricating oil.
[0053] Specifically, the effect of the oil filter acting on the lubricating oil in the oil sump includes filtering the impurities in the oil sump, thereby reducing the wear of the engine parts caused by the impurities and prolonging the service life of the engine; keeping the lubricating oil clean, timely removing the gum and the like generated by the lubricating oil, reducing the impurities and oxides in the lubricating oil, maintaining the lubricating property of the lubricating oil, and facilitating the reduction of the friction resistance of the engine; prolonging the service life of the lubricating oil, slowing down the aging speed of the lubricating oil, reducing the replacement frequency of the lubricating oil, reducing the use cost, and reducing the waste disposal problem caused by the frequent replacement of the lubricating oil; maintaining the normal working temperature of the engine, the lubricating oil with less impurities can flow more smoothly in the engine and take away more heat; protecting the precise parts of the engine, such as avoiding the impurities from entering the piston ring, the valve tappet, the camshaft and other tight parts, thereby providing reliable lubrication protection for these precise parts and ensuring the normal operation and stable performance of the engine.
[0054] In some embodiments, referring to Figure 2 The oil sump further comprises a first oil draining bolt 9 and a second oil draining bolt 10, the first oil draining bolt 9 is detachably mounted at the bottom of the lubricating oil containing part 1, and the second oil draining bolt 10 is detachably mounted at the bottom of the cooling oil containing part 2, wherein the head of the first oil draining bolt 9 and the head of the second oil draining bolt 10 are both located outside the outer wall of the corresponding containing part. In this way, the corresponding oil draining bolt is arranged at the bottom of each containing part, so as to facilitate the maintenance and replacement of the lubricating oil and the cooling oil, effectively simplify the oil changing operation, and improve the oil changing efficiency.
[0055] In the embodiment, the lowest position of the lubricating oil accommodating portion 1 is provided with the first oil drain bolt 9, so as to facilitate the outflow and replacement of the lubricating oil from the lowest position of the lubricating oil accommodating portion 1; the lowest position of the cooling oil accommodating portion 2 is provided with the second oil drain bolt 10, so as to facilitate the outflow and replacement of the cooling oil from the lowest position of the cooling oil accommodating portion 2. The number of the first oil drain bolt 9 and the second oil drain bolt 10 can be one, or multiple first oil drain bolts 9 and multiple second oil drain bolts 10 can be used in combination according to specific use scenarios.
[0056] In other embodiments, referring to Figure 2 , the first oil drain bolt 9 and the second oil drain bolt 10 can be connected with corresponding sealing rings at the connection positions with the oil pan, so as to improve the sealing performance of the connection positions of the first oil drain bolt 9 and the second oil drain bolt 10; in addition, the oil drain bolt has a head portion, which is one end of the oil drain bolt for facilitating disassembly, and the head portion can be a hexagonal head or other structure for facilitating disassembly. The head portion of the oil drain bolt is located at the outer wall of the oil pan and does not extend into the oil pan, so as to facilitate the disassembly of the oil drain bolt; specifically, the head portion of the oil drain bolt can be partially embedded in the outer wall of the oil pan, so as to ensure the strength of the connection structure while reducing the space occupation.
[0057] In some embodiments, referring to Figure 1 and Figure 3 , the lubricating oil accommodating portion 1 and the cooling oil accommodating portion 2 are arranged adjacent to each other along the length direction of the oil pan, the width of the lubricating oil accommodating portion 1 is smaller than that of the cooling oil accommodating portion 2, and the length of the lubricating oil accommodating portion 1 is greater than that of the cooling oil accommodating portion 2; the partition portion 3 includes a sealing surface 3-1 and a rear oil seal mounting hole 3-2, the sealing surface 3-1 is arranged obliquely and used to abut against the corresponding sealing structure of the cylinder block; the rear oil seal mounting hole 3-2 has at least two, and the rear oil seal mounting hole 3-2 is arranged on the sealing surface 3-1. In this way, by arranging the sealing surface 3-1 on the partition portion 3, when the oil pan is installed, the sealing surface 3-1 abuts against the corresponding protruding sealing structure on the cylinder block, so as to realize the sealing of the side of the cooling oil accommodating portion 2 close to the lubricating oil accommodating portion 1; the rear oil seal mounting hole 3-2 is used to press the closely fitted sealing surface 3-1 and the sealing structure, so as to effectively strengthen the sealing effect.
[0058] In other embodiments, referring to Figure 1 and Figure 3 , the number of the rear oil seal mounting hole 3-2 is not limited to two, and multiple rear oil seal mounting holes 3-2 are uniformly distributed on the sealing surface 3-1.
[0059] In some embodiments, referring to Figure 1 and Figure 3The oil pan also includes a stator mounting portion 11, which is located inside the cooling oil reservoir 2. The stator mounting portion 11 is columnar and protrudes in a direction away from the lubricating oil reservoir 1. In this way, by providing the stator mounting portion 11 inside the oil pan to connect with the motor stator, the structural integration within the oil pan is effectively improved.
[0060] In this embodiment, the stator mounting part 11 has a columnar protrusion structure, and a corresponding mounting hole is provided in the middle of the protrusion structure. The stator is connected by the mounting hole and bolts.
[0061] In some embodiments, see Figure 2 The oil pan also includes a rear suspension mounting portion 12, which is located on the outer wall of the bottom of the coolant reservoir 2. The rear suspension mounting portion 12 has at least two mounting holes. Thus, by providing the rear suspension mounting portion 12 on the oil pan to connect the key components of the engine rear suspension, and by mounting the engine rear suspension on the rear suspension mounting portion 12 of the oil pan, the engine can be stably fixed to the vehicle chassis or frame, supporting the engine's weight and ensuring that the engine maintains the correct position during vehicle operation, preventing displacement or shaking due to vibration, bumps, or other factors. This also ensures the relative positional relationship between the engine and other components, allowing the engine to operate normally. Furthermore, the rear suspension typically uses elastic elements such as rubber or hydraulic components, which can provide shock absorption and cushioning, thereby reducing vehicle noise, improving vehicle driving performance and comfort, and also enhancing handling and stability.
[0062] In other embodiments, see Figure 2 The rear suspension mounting portion 12 includes at least two columnar protrusions, each columnar protrusion having a mounting hole for connecting the engine's rear suspension.
[0063] In some embodiments, see Figure 1 and Figure 3 The first mounting surface 4 is U-shaped and located on the top surface of the oil pan. The lower part of the U-shape of the first mounting surface 4 is the lubricating oil receiving part 1, and the upper part of the U-shape of the first mounting surface 4 is the cooling oil receiving part 2. In this way, the structure and distribution of the lubricating oil receiving part 1 are similar to those of the existing structure, thereby reducing changes to the other structures corresponding to the lubricating oil receiving part 1 and facilitating the distribution design of the other structures.
[0064] In other embodiments, see Figure 1 and Figure 3 The second mounting surface 5 is located on the side of the oil pan. The second mounting surface 5 can be set perpendicular to the first mounting surface 4, that is, the second mounting surface 5 is set in the vertical direction.
[0065] In some embodiments, see Figure 1 and Figure 3The oil sump further comprises connecting holes 13 for mounting of the oil sump, and a plurality of connecting holes 13 are formed on the first mounting surface 4 and the second mounting surface 5.
[0066] Specifically, referring to Figure 1 and Figure 3 The first mounting surface 4 and the second mounting surface 5 are respectively provided with outwardly extending ear-shaped structures at positions where the connecting holes 13 are formed, so as to increase the local width of the first mounting surface 4 and the second mounting surface 5, thereby ensuring that the size of the connecting hole 13 forming position is sufficient to avoid the problem of hidden cracking near the connecting hole 13 forming position.
[0067] In a second aspect, the application provides:
[0068] A range extending system, in some embodiments, comprising an oil sump.
[0069] In the prior art, the oil sump and the shell of the generator are separately arranged, and the present application provides a structure for combining the oil sump and the oil storage function of the generator together, which is arranged in view of the structure that the range extender engine and the generator are arranged as separate modules, and the cooling oil containing part 2 of the generator is arranged on the oil sump, which is beneficial to improve the functional integration of the oil sump, reduce the associated components between the oil sump and the generator, and facilitate the assembly of the oil sump and the generator and improve the installation efficiency.
[0070] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "length", "width", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. The terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, they can be fixedly connected, or detachably connected, or integrated; they can be mechanically connected, or electrically connected; they can be directly connected, or indirectly connected through an intermediate medium; they can be the internal connection or interaction relationship of two elements, unless otherwise specified.
[0071] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example" or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.
[0072] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the utility model patent. It should be pointed out that for those skilled in the art, under the premise of not departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.
Claims
1. An oil pan characterized by comprising: The oil pan is used in a range extending system, and comprises: a lubricating oil accommodating portion (1) which is concave and has a cavity structure with only a top surface being open; a cooling oil accommodating portion (2) which is concave and has a top surface and a side surface being open; a partition portion (3) which divides the concave structure of the oil pan into the lubricating oil accommodating portion (1) and the cooling oil accommodating portion (2) which are adjacent and not communicated; a first mounting surface (4) for being connected to a cylinder head body, which is formed on a top surface of the oil pan; a second mounting surface (5) for being connected to an electric motor oil pump, which is formed on a side surface of the cooling oil accommodating portion (2).
2. An oil pan according to claim 1, characterized in that The oil pan further comprises: an oil filter mounting portion (6) connected to a side of the lubricating oil accommodating portion (1) which is opposite to the first mounting surface (4).
3. An oil pan according to claim 2, characterized in that The oil pan further comprises: an oil changing portion (7) located in the lubricating oil accommodating portion (1), and having a top surface which is lower than the first mounting surface (4); two oil changing holes (8) which are both formed on the top surface of the oil changing portion (7) and are used for oil exchange between the oil filter and the lubricating oil accommodating portion (1), one of the oil changing holes (8) being used for oil inlet of the oil filter, and the other being used for oil outlet of the oil filter.
4. The oil pan according to claim 1, characterized by The oil pan further comprises: a first oil drain bolt (9) which is detachably mounted on a bottom of the lubricating oil accommodating portion (1); a second oil drain bolt (10) which is detachably mounted on a bottom of the cooling oil accommodating portion (2); wherein the head of the first oil drain bolt (9) and the head of the second oil drain bolt (10) are both located outside the outer wall of the corresponding accommodating portion.
5. The oil pan according to claim 1, characterized by The lubricating oil accommodating portion (1) and the cooling oil accommodating portion (2) are arranged adjacent to each other along the length direction of the oil pan, the lubricating oil accommodating portion (1) has a smaller width than the cooling oil accommodating portion (2), and the lubricating oil accommodating portion (1) has a greater length than the cooling oil accommodating portion (2); The partition portion (3) comprises: a sealing surface (3-1) which is arranged obliquely and used for abutting against a corresponding sealing structure of the cylinder body; a plurality of rear oil seal mounting holes (3-2) which are formed on the sealing surface (3-1).
6. The oil pan according to claim 1, characterized by The oil pan further comprises: a stator mounting portion (11) which is located in the cooling oil accommodating portion (2) and has a columnar shape and protrudes in a direction away from the lubricating oil accommodating portion (1).
7. The oil pan according to claim 1, characterized by The oil pan further comprises: A rear suspension mounting portion (12) is provided on the outer wall of the bottom of the cooling oil accommodation portion (2), and has at least two mounting holes.
8. The oil pan according to claim 1, characterized by The first mounting surface (4) is U-shaped and is provided on the top surface of the oil pan, the lower part of the U-shaped first mounting surface (4) is the lubricating oil accommodation portion (1), and the upper part of the U-shaped first mounting surface (4) is the cooling oil accommodation portion (2).
9. The oil pan according to claim 1, characterized by, The oil pan further comprises: A plurality of connecting holes (13) are provided on the first mounting surface (4) and the second mounting surface (5) for mounting of the oil pan.
10. A range extending system, characterized by, An oil pan as claimed in any one of claims 1 to 9.