Power system and vehicle with same

Abstract

The invention discloses a power system and a vehicle with the power system, and the power system comprises a generator which comprises a shell and a rotor arranged in the shell; the engine comprises a box body and a crankshaft arranged in the box body, a through hole is formed in the box body, and one end of the crankshaft penetrates through the through hole to be fixed to the rotor; the crankshaft is sleeved with the first oil seal part and the second oil seal part, the first oil seal part and the second oil seal part are arranged at intervals in the axial direction of the crankshaft, the first oil seal part and the second oil seal part abut against the inner wall of the through hole in a sealed mode, a ventilation channel is formed in the box body, one end of the ventilation channel penetrates through the outer surface of the box body, and the other end of the ventilation channel is communicated with the outer surface of the box body. The other end of the ventilation channel penetrates through the inner wall of the through hole and is located between the first oil sealing piece and the second oil sealing piece. According to the power system, the sealing effect of the engine and the generator can be effectively guaranteed, the risk of medium leakage in the power system is reduced, the first oil sealing piece and the second oil sealing piece can be effectively protected, and therefore the reliability of the power system is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a power system and a vehicle having the same. Background Art

[0002] The extended-range electric vehicle is a pure electric vehicle platform with an extended-range power generation system added. When the power battery is low on power, the range extender engine will work, driving the generator to provide additional electricity for the entire vehicle, thereby extending the driving range. Therefore, it combines the advantages of a pure electric platform with a high degree of electrification and a hybrid platform with no range anxiety and low battery discharge. It is considered to be an ideal solution for the transition from traditional power vehicles to pure electric vehicles.

[0003] In the prior art, in order to achieve an integrated design, the torsion damping and vibration reduction structure between the engine and the generator is usually eliminated, and the crankshaft of the engine is extended into the cavity of the generator and highly integrated with the input shaft of the generator. There is only one casing wall between the engine and the generator, and oil seals are set at the joint between the casing wall and the crankshaft. However, the oil seals are often unreliable, which makes the power system unreliable. Summary of the Invention

[0004] The present invention aims to address at least one of the technical problems existing in the prior art. To this end, the present invention provides a power system that not only effectively seals the engine and generator, reducing the risk of internal system medium leakage, but also effectively protects the first and second oil seals, thereby effectively improving the reliability of the power system.

[0005] The present invention also provides a vehicle having the above power system.

[0006] According to a first aspect of the present invention, a power system includes: a generator, the generator including a shell and a rotor arranged in the shell; an engine, the engine including a casing and a crankshaft arranged in the casing, the casing being provided with a through hole, one end of the crankshaft passing through the through hole and fixed to the rotor; a first oil seal and a second oil seal, the first oil seal and the second oil seal being sleeved on the crankshaft and arranged at intervals along the axial direction of the crankshaft, the first oil seal and the second oil seal being in sealing contact with the inner wall of the through hole, wherein an air permeable channel is formed on the casing, one end of the air permeable channel passes through the outer surface of the casing, and the other end of the air permeable channel passes through the inner wall of the through hole and is located between the first oil seal and the second oil seal.

[0007] According to the power system of the present invention, a generator, an engine, a first oil seal and a second oil seal are provided in the power system, the generator includes a housing and a rotor arranged in the housing, the engine includes a case and a crankshaft arranged in the case, the case is provided with a through hole, one end of the crankshaft passes through the through hole and is fixed to the rotor, the first oil seal and the second oil seal are sleeved on the crankshaft and arranged at intervals along the axial direction of the crankshaft, the first oil seal and the second oil seal are sealed and abutted against the inner wall of the through hole, wherein an air permeable channel is formed on the case, one end of the air permeable channel passes through the outer surface of the case, and the other end of the air permeable channel passes through the inner wall of the through hole and is located between the first oil seal and the second oil seal, which can not only effectively ensure the sealing effect of the engine and the generator and reduce the risk of leakage of the internal medium of the power system, but also effectively protect the first oil seal and the second oil seal, thereby effectively improving the reliability of the power system.

[0008] In some embodiments, the first oil seal and the second oil seal are symmetrically arranged in the axial direction of the crankshaft.

[0009] In some embodiments, the power system further includes: a breathable member, wherein the breathable member blocks the breathable channel and is configured to allow only gas to pass through the breathable member.

[0010] In some embodiments, the air permeable member is disposed at an end of the air permeable channel away from the through hole.

[0011] In some embodiments, the air permeable channel includes a main body section and an assembly section, the main body section extends radially along the crankshaft, and one end passes through the inner wall of the through hole, the assembly section is connected to the end of the main body section away from the through hole and extends radially along the crankshaft to pass through the outer wall of the box body, wherein the diameter of the assembly section is larger than the diameter of the main body section, the air permeable member is arranged on the outside of the box body, and a portion of it is sealed in the assembly section.

[0012] In some embodiments, the breathable member is a vent plug.

[0013] In some embodiments, the generator further includes: a connecting bracket, which is annular, one end of the crankshaft is passed through the inner side of the connecting bracket and fixedly connected to the connecting bracket, and the rotor is sleeved and fixed on the outer side of the connecting bracket.

[0014] In some embodiments, the crankshaft and the connecting bracket are connected via a connecting key, and the number of the connecting key is one or a plurality of connecting keys arranged at intervals along the circumference of the crankshaft.

[0015] In some embodiments, a first groove is formed on the outer peripheral surface of the crankshaft, a second groove is formed on the inner wall surface of the connecting bracket, the connecting key is adapted to the shape of the first groove and the second groove, and a part is fitted in the first groove and the other part is fitted in the second groove.

[0016] In some embodiments, the connecting key and the connecting bracket are integrally formed, and the crankshaft is formed with a keyway adapted to the shape of the connecting key.

[0017] In some embodiments, a boss is formed on the outer surface of one end of the crankshaft, and the boss extends axially along the crankshaft. A raised retaining rib is formed on the end of the boss facing the housing, and the retaining rib cooperates with the boss to define the keyway.

[0018] In some embodiments, a connecting hole is formed at one end of the crankshaft, and the connecting hole extends along the axial direction of the crankshaft and passes through the end face of the one end of the crankshaft. The power system also includes a fixing bolt, the stud of the fixing bolt is threadedly engaged in the connecting hole, and the screw head of the fixing bolt abuts against the shoulder on the inner wall surface of the connecting bracket and / or the end of the connecting key facing away from the box body in the axial direction of the crankshaft.

[0019] In some embodiments, a first inclined surface is formed on the outer surface of one end of the crankshaft, and the first inclined surface extends obliquely toward the central axis of the crankshaft in the direction from the case toward the shell along the axial direction of the crankshaft, and a second inclined surface parallel to and fitted with the first inclined surface is formed on the inner wall surface of the connecting bracket.

[0020] In some embodiments, the connecting bracket includes: an outer ring plate, an inner ring plate and a connecting plate, the outer ring plate and the inner ring plate both extend along the axial direction of the rotor and extend in a ring shape along the circumferential direction of the rotor, the outer ring plate is arranged on the radial outer side of the inner ring plate in the rotor, and the connecting plate is connected between the outer ring plate and the inner ring plate, wherein the inner ring plate is fixed to the crankshaft, and the rotor is sleeved and fixed on the outer ring plate.

[0021] In some embodiments, the shell is open toward one side of the housing, the open side of the shell is provided with a first flange portion, the housing is provided with a second flange portion, and the first flange portion and the second flange portion are butt-connected in the axial direction of the crankshaft by fasteners.

[0022] In some embodiments, in the axial direction of the crankshaft, the side wall of the housing facing away from the engine is an end cover, and a mounting portion is formed on the end cover. The mounting portion is cylindrical and extends along the axis of the crankshaft. A bearing is provided on the inner side of the mounting portion, and the one end of the crankshaft fits in the bearing. Alternatively, the generator includes a connecting bracket, the rotor is sleeved on the outside of the connecting bracket, and the one end of the crankshaft is fixed to the connecting bracket. The connecting bracket has a support portion extending toward the mounting portion, and one end of the support portion is passed through the bearing.

[0023] In some embodiments, the power system further includes a resolver device, which is sleeved on the outside of the support portion or the crankshaft and is spaced apart from the bearing in the axial direction of the crankshaft.

[0024] A vehicle according to a second aspect of the present invention includes the power system according to the first aspect of the present invention.

[0025] The vehicle according to the second aspect of the present invention, by providing the power system of the first aspect, can not only effectively ensure the sealing effect of the engine and generator and reduce the risk of leakage of the medium inside the power system, but also effectively protect the first oil seal and the second oil seal, thereby effectively improving the reliability of the power system.

[0026] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a cross-sectional view of a power system according to some embodiments of the present application;

[0028] Figure 2 is a cross-sectional view of a power system according to other embodiments of the present application;

[0029] Figure 3 is a cross-sectional view of a ventilation channel according to an embodiment of the present application;

[0030] Figure 4 is a cross-sectional view of a connecting bracket according to some embodiments of the present application;

[0031] Figure 5 It is along Figure 4 Cross-sectional view along line AA;

[0032] Figure 6 is a cross-sectional view of a connecting bracket according to other embodiments of the present application.

[0033] Reference numerals:

[0034] 100. Power system;

[0035] 10. Generator; 101. Second installation cavity;

[0036] 11. Housing; 111. First flange; 112. End cover; 1121. Mounting portion; 11211. First connecting portion; 11212. Second connecting portion;

[0037] 12. Rotor;

[0038] 13. Stator;

[0039] 14. Connecting bracket; 141. Outer ring plate; 142. Inner ring plate; 1421. Shoulder; 1422. Second inclined surface; 143. Connecting plate; 144. Support portion;

[0040] 20. Engine; 201. First mounting cavity;

[0041] 21. Box body; 211. Ventilation channel; 2111. Main body section; 2112. Assembly section; 212. Second flange section;

[0042] 22. Crankshaft; 221. Boss; 2211. Rib; 222. Connecting hole; 223. First inclined surface;

[0043] 30. First oil seal;

[0044] 40. Second oil seal;

[0045] 50. Breathable parts;

[0046] 60. Connect key;

[0047] 70. Fixing bolts;

[0048] 71. Stud;

[0049] 72. Snail head;

[0050] 80. Bearings;

[0051] 90. Rotary transformer. DETAILED DESCRIPTION

[0052] The following describes embodiments of the present invention in detail, examples of which 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 to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0053] Reference below Figures 1-6 A power system 100 according to an embodiment of the first aspect of the present invention will be described.

[0054] like Figure 1-Figure 3 As shown, the power system 100 according to the first embodiment of the present invention includes: a generator 10, an engine 20, a first oil seal 30 and a second oil seal 40.

[0055] The generator 10 includes a housing 11 and a rotor 12 disposed in the housing 11; the engine 20 includes a casing 21 and a crankshaft 22 disposed in the casing 21, the casing 21 being provided with a through hole, one end of the crankshaft 22 passing through the through hole and fixed to the rotor 12; a first oil seal 30 and a second oil seal 40 are sleeved on the crankshaft 22 and arranged at intervals along the axial direction of the crankshaft 22, the first oil seal 30 and the second oil seal 40 are in sealing contact with the inner wall of the through hole, wherein a breathable passage 211 is formed on the casing 21, one end of the breathable passage 211 passes through the outer surface of the casing 21, and the other end of the breathable passage 211 passes through the inner wall of the through hole and is located between the first oil seal 30 and the second oil seal 40.

[0056] In some specific examples, such as Figure 1 and Figure 2 As shown, the engine 20 is arranged on the left side of the generator 10, and a through hole is provided on the right side wall of the casing 21 of the engine 20, which passes through the right side wall. A first mounting cavity 201 is formed in the casing 21 of the engine 20, and a second mounting cavity 101 is formed in the casing 11 of the generator 10. The crankshaft 22 is arranged in the first mounting cavity 201, and the right end of the crankshaft 22 extends through the through hole into the second mounting cavity 101 and is fixedly connected to the rotor 12 in the second mounting cavity 101. That is to say, the rotation of the crankshaft 22 can drive the rotor 12 of the generator 10 to rotate.

[0057] For example Figure 3 As shown, a first oil seal 30 and a second oil seal 40 are sleeved on the crankshaft 22. The first oil seal 30 and the second oil seal 40 are spaced apart in the axial direction of the crankshaft 22, with the first oil seal 30 being arranged to the left of the second oil seal 40. Furthermore, the first oil seal 30 and the second oil seal 40 extend in an annular shape along the circumference of the crankshaft 22 of the engine 20, and the outer circumferential surfaces of the first oil seal 30 and the second oil seal 40 abut against the inner wall of the through hole.

[0058] Furthermore, the first oil seal 30 and the second oil seal 40 are one-way oil seals, that is, the air outside the engine 20 and the generator 10 can enter the interior of the engine 20 and the generator 10 through the one-way oil seals, while the medium inside the engine 20 and the generator 10 will not leak from the interior of the engine 20 and the generator 10 to the outside. Therefore, the sealing performance of the first oil seal 30 and the second oil seal 40 can be effectively improved.

[0059] In some specific examples, such as Figure 3As shown, a ventilation channel 211 extending vertically is provided on the right side wall of the casing 21 of the engine 20. The upper end of the ventilation channel 211 extends through the outer surface of the casing 21, and the lower end of the ventilation channel 211 extends through the inner wall of the through hole. The lower end of the ventilation channel 211 is located between the first oil seal 30 and the second oil seal 40. Furthermore, the generator 10 is provided with a stator 13, which is disposed in the second mounting cavity 101, and the outer circumference of the stator 13 is fixedly connected to the inner wall of the casing 11 of the generator 10.

[0060] In this embodiment, when power system 100 is operating, the crankshaft 22 of engine 20 transmits power to rotor 12 of generator 10 through its own rotation, driving rotor 12 to rotate. This, in turn, generates an induced electromotive force within stator 13 through electromagnetic induction, thereby generating electricity. The first oil seal 30 prevents leakage of the medium within engine 20, while the second oil seal 40 prevents leakage of the medium within generator 10. Both the first oil seal 30 and the second oil seal 40 function to ensure normal oil pumping.

[0061] It should be noted that due to temperature fluctuations and the gases generated during engine 20 operation, additional pressure is generated inside the engine housing 21. The vent channel 211 allows the gases inside the engine housing 21 to be released to the outside. Furthermore, when the outside air pressure is high, the vent channel 211 allows air to enter the engine housing 21, thereby avoiding excessive pressure differences between the inside and outside of the housing 21 and preventing damage to the oil seals and seal failure caused by pressure. Thus, the vent channel 211 ensures pressure balance, effectively protecting the first and second oil seals 30, 40, and thereby effectively improving the reliability of the first and second oil seals 30, 40.

[0062] According to the power system 100 of the embodiment of the present invention, a generator 10, an engine 20, a first oil seal 30 and a second oil seal 40 are provided in the power system 100. The generator 10 includes a housing 11 and a rotor 12 provided in the housing 11. The engine 20 includes a case 21 and a crankshaft 22 provided in the case 21. The case 21 is provided with a through hole. One end of the crankshaft 22 passes through the through hole and is fixed to the rotor 12. The first oil seal 30 and the second oil seal 40 are sleeved on the crankshaft 22 and are arranged at intervals along the axial direction of the crankshaft 22. The first oil seal 30 and The second oil seal 40 is in sealing contact with the inner wall of the through hole, wherein a ventilation channel 211 is formed on the box body 21, one end of the ventilation channel 211 passes through the outer surface of the box body 21, and the other end of the ventilation channel 211 passes through the inner wall of the through hole and is located between the first oil seal 30 and the second oil seal 40. This can not only effectively ensure the sealing effect of the engine 20 and the generator 10 and reduce the risk of leakage of the internal medium of the power system 100, but also effectively protect the first oil seal 30 and the second oil seal 40, thereby effectively improving the reliability of the power system 100.

[0063] In one embodiment of the present invention, Figure 1-Figure 3 As shown, the first oil seal 30 and the second oil seal 40 are symmetrically arranged in the axial direction of the crankshaft 22 .

[0064] In some specific examples, such as Figure 1-Figure 3 As shown, the first oil seal 30 and the second oil seal 40 are symmetrically arranged in the left-right direction. Further, in the left-right direction, the first oil seal 30 and the second oil seal 40 are symmetrically arranged in reverse.

[0065] This embodiment can effectively optimize the spatial layout of the first oil seal 30 and the second oil seal 40 by symmetrically arranging the first oil seal 30 and the second oil seal 40 in the axial direction of the crankshaft 22, thereby effectively saving installation space and effectively improving space utilization.

[0066] In one embodiment of the present invention, Figure 1-Figure 3 As shown, the power system 100 further includes a breathable member 50 , which blocks the breathable channel 211 and is configured to allow only gas to pass through the breathable member 50 .

[0067] It should be noted that the breathable member 50 can effectively prevent external pollutants such as dust and solid particles from entering the interior of the engine 20 case 21 and the generator 10 housing 11, protecting the internal components of the engine 20 and the generator 10 from contamination, ensuring the cleanliness of the working environment of key components such as the crankshaft 22, the first oil seal 30, the second oil seal 40 and the rotor 12, thereby extending their service life.

[0068] This embodiment provides a breathable member 50 in the power system 100. The breathable member 50 blocks the breathable channel 211 and is configured to allow only gas to pass through the breathable member 50. This can prevent external pollutants from entering the interior of the power system 100, thereby ensuring the cleanliness of the internal environment of the power system 100 and effectively improving the durability of the power system 100.

[0069] In one embodiment of the present invention, Figure 1-Figure 3 As shown, the air permeable member 50 is disposed at one end of the air permeable channel 211 away from the through hole.

[0070] In some specific examples, such as Figure 1-Figure 3 As shown, the breathable member 50 is fixedly mounted at the upper end of the breathable passage 211. This facilitates inspection, cleaning, or replacement of the breathable member 50 without requiring access to the interior of the power system 100, thereby simplifying the maintenance process. Furthermore, it prevents contaminants such as solid particles from entering the breathable passage 211, thereby preventing them from clogging the breathable passage 211 and effectively ensuring the breathability of the breathable passage 211.

[0071] This embodiment arranges the breathable member 50 at the end of the breathable channel 211 away from the through hole, which not only facilitates the repair and replacement of the breathable member 50, thereby effectively improving the maintenance efficiency of the breathable member 50, but also prevents pollutants from clogging the breathable channel 211, thereby effectively ensuring the air permeability of the breathable channel 211, thereby further improving the reliability of the breathable channel 211.

[0072] In one embodiment of the present invention, Figure 3 As shown, the air passage 211 includes a main section 2111 and an assembly section 2112. The main section 2111 extends radially along the crankshaft 22, and one end passes through the inner wall of the through hole. The assembly section 2112 is connected to the end of the main section 2111 away from the through hole and extends radially along the crankshaft 22 to pass through the outer wall of the case 21. The diameter of the assembly section 2112 is larger than the diameter of the main section 2111. The air permeable member 50 is arranged on the outside of the case 21, and a portion of it is blocked in the assembly section 2112.

[0073] In some specific examples, such as Figure 3 As shown, the main body section 2111 and the assembly section 2112 are both extended in the up and down directions. The main body section 2111 is arranged on the lower side of the assembly section 2112. The lower end of the main body section 2111 passes through the inner wall of the through hole. The upper end of the main body section 2111 is connected to the lower end of the assembly section 2112. The upper end of the assembly section 2112 extends upward to pass through the outer wall of the box body 21.

[0074] Furthermore, the diameter of the assembly section 2112 is greater than that of the main body section 2111, thereby effectively saving installation space and reducing the volume of the power system 100. Furthermore, a portion of the breathable member 50 can be assembled and sealed within the assembly section 2112. In other words, the assembly section 2112 provides a mounting location for the breathable member 50, thereby effectively improving the convenience of installing the breathable member 50.

[0075] In this embodiment, a main body section 2111 and an assembly section 2112 are provided in the air permeable channel 211. The main body section 2111 extends radially along the crankshaft 22, and one end passes through the inner wall of the through hole. The assembly section 2112 is connected to the end of the main body section 2111 away from the through hole and extends radially along the crankshaft 22 to pass through the outer wall of the case 21. The diameter of the assembly section 2112 is larger than the diameter of the main body section 2111. The air permeable member 50 is arranged on the outside of the case 21, and a part of it is blocked in the assembly section 2112. This can not only effectively save the installation space of the power system 100, but also facilitate the installation of the air permeable member 50, thereby effectively improving the assembly efficiency of the air permeable member 50.

[0076] In one embodiment of the present invention, Figure 1-Figure 3 As shown, the breathable member 50 is a vent plug.

[0077] This embodiment, by configuring the air permeable member 50 as a vent plug, facilitates inspection, cleaning, or repair of the air permeable member 50, thereby effectively reducing the difficulty of maintaining the air permeable member 50 and thereby effectively improving the maintenance efficiency of the air permeable member 50. Furthermore, the vent plug has a simple structure and low cost, thereby effectively reducing the cost of the air permeable member 50.

[0078] In one embodiment of the present invention, Figure 1 and Figure 2 As shown, the generator 10 also includes: a connecting bracket 14, which is annular. One end of the crankshaft 22 is inserted into the inner side of the connecting bracket 14 and fixedly connected to the connecting bracket 14, and the rotor 12 is sleeved and fixed on the outer side of the connecting bracket 14.

[0079] In some specific examples, such as Figure 1 and Figure 2 As shown, a connecting bracket 14 is disposed within the second mounting cavity 101 of the generator 10. The connecting bracket 14 extends in an annular shape along the circumference of the crankshaft 22. Furthermore, the right end of the crankshaft 22 passes through the inner side of the connecting bracket 14 and is fixedly connected to the connecting bracket 14. The rotor 12 and the connecting bracket 14 are fixedly connected using a press-fit process, and a locking ring is disposed between the ends of the rotor 12 and the connecting bracket 14 to ensure a secure connection between the rotor 12 and the connecting bracket 14.

[0080] This embodiment provides an annular connecting bracket 14 within the generator 10. One end of the crankshaft 22 is inserted into and fixedly connected to the connecting bracket 14, while the rotor 12 is sleeved and fixedly attached to the outer side of the connecting bracket 14. This effectively simplifies the fixed connection between the crankshaft 22 and the rotor 12, thereby effectively improving assembly efficiency. Furthermore, the annular connecting bracket 14 provides a sturdy and stable support platform for the rotor 12, thereby helping to improve the stability and reliability of the generator 10 during operation.

[0081] In one embodiment of the present invention, Figure 1 and Figure 2 As shown, the crankshaft 22 and the connecting bracket 14 are connected by a connecting key 60 , and the number of the connecting key 60 is one or a plurality of connecting keys 60 arranged at intervals along the circumference of the crankshaft 22 .

[0082] For example, the number of the connection key 60 may be one; for another example, the number of the connection key 60 may be multiple, for example, the number of the connection key 60 may be two, three, four, five, or more than six. In some specific examples, such as Figure 1 As shown, the connecting key 60 is a flat key, and the number of the flat key is one; in other specific examples, such as Figure 2 As shown, the connecting key 60 is a flat key, and there are two flat keys, which are arranged at intervals in the circumferential direction of the crankshaft 22 .

[0083] In this embodiment, the crankshaft 22 and the connecting bracket 14 are connected by a connecting key 60. The number of the connecting key 60 is one or a plurality of connecting keys 60 arranged at intervals along the circumference of the crankshaft 22, which can effectively ensure the reliability of the connection between the crankshaft 22 and the connecting bracket 14, thereby ensuring the reliability of power transmission.

[0084] In one embodiment of the present invention, Figure 4 and Figure 5 As shown, a first groove is formed on the outer peripheral surface of the crankshaft 22, and a second groove is formed on the inner wall surface of the connecting bracket 14. The connecting key 60 is adapted to the shapes of the first groove and the second groove, and one part is fitted in the first groove and the other part is fitted in the second groove.

[0085] In some specific examples, such as Figure 4 and Figure 5 As shown, a first groove is formed on the outer peripheral surface of the crankshaft 22 and is recessed from the outside to the inside along the radial direction of the crankshaft 22, and a second groove is formed on the inner wall surface of the connecting bracket 14 and is recessed from the inside to the outside along the radial direction of the crankshaft 22. A part of the connecting key 60 can be fitted into the first groove, and the other part of the connecting key 60 can be fitted into the second groove. Thus, the end of the crankshaft 22 can be fixedly connected to the connecting bracket 14. That is to say, the rotation of the crankshaft 22 can drive the rotation of the connecting bracket 14.

[0086] In this embodiment, a first groove is formed on the outer peripheral surface of the crankshaft 22 and a second groove is formed on the inner wall surface of the connecting bracket 14. The connecting key 60 is adapted to the shapes of the first groove and the second groove, and one part is fitted in the first groove and the other part is fitted in the second groove. This can not only ensure the connection strength between the crankshaft 22 and the connecting bracket 14, but also make the connecting key 60 detachable and connected, thereby facilitating the maintenance of the connecting key 60 and effectively improving the convenience of maintenance.

[0087] In one embodiment of the present invention, Figure 6 As shown, the connecting key 60 is integrally formed with the connecting bracket 14 , and the crankshaft 22 is formed with a keyway that matches the shape of the connecting key 60 .

[0088] In some specific examples, such as Figure 6 As shown, a keyway is formed on the outer circumferential surface of the right end of the crankshaft 22, and the connecting key 60 on the connecting bracket 14 can be assembled into the keyway, thereby effectively ensuring a reliable connection between the crankshaft 22 and the connecting bracket 14. Furthermore, the connecting key 60 and the connecting bracket 14 are integrally formed, thereby effectively improving the structural strength of the connecting key 60 and reducing the risk of the connecting key 60 loosening.

[0089] In this embodiment, the connecting key 60 and the connecting bracket 14 are integrally formed, and a keyway that matches the shape of the connecting key 60 is formed on the crankshaft 22. This not only effectively improves the structural strength of the connecting key 60, but also effectively reduces the risk of the connecting key 60 becoming loose, thereby effectively improving the reliability and stability of the connecting key 60.

[0090] In one embodiment of the present invention, as shown in Figure 6, a boss 221 is formed on the outer surface of one end of the crankshaft 22, and the boss 221 extends along the axial direction of the crankshaft 22. A raised retaining rib 2211 is formed at one end of the boss 221 facing the housing 21, and the retaining rib 2211 cooperates with the boss 221 to define a keyway.

[0091] In some specific examples, as shown in Figure 6, a boss 221 is formed on the outer circumferential surface of the right end of the crankshaft 22. Furthermore, the number of bosses 221 can be multiple, for example, two, three, four, five, or six or more. The boss 221 extends in the left-right direction. A retaining rib 2211 is formed at the left end of the boss 221, protruding from the inside to the outside along the radial direction of the crankshaft 22. The retaining rib 2211 corresponds to the boss 221 in a one-to-one relationship. Furthermore, a keyway is formed on the outer circumferential surface of the boss 221, recessed from the outside to the inside along the radial direction of the crankshaft 22. The keyway is formed by the boss 221 and the retaining rib 2211.

[0092] In this embodiment, a boss 221 is formed on the outer surface of one end of the crankshaft 22. The boss 221 extends along the axial direction of the crankshaft 22. A raised retaining rib 2211 is formed at one end of the boss 221 facing the housing 21. The retaining rib 2211 cooperates with the boss 221 to define a keyway, which can effectively improve the structural strength and durability of the keyway, thereby effectively ensuring the reliability of the connection between the crankshaft 22 and the connecting bracket 14.

[0093] In one embodiment of the present invention, Figure 4 As shown, a connecting hole 222 is formed at one end of the crankshaft 22, and the connecting hole 222 extends along the axial direction of the crankshaft 22 and passes through the end surface of one end of the crankshaft 22. The power system 100 also includes a fixing bolt 70, and the stud 71 of the fixing bolt 70 is threadedly engaged in the connecting hole 222. The screw head 72 of the fixing bolt 70 abuts against the shoulder 1421 on the inner wall surface of the connecting bracket 14 and / or the end of the connecting key 60 facing away from the housing 21 in the axial direction of the crankshaft 22.

[0094] In some specific examples, such as Figure 4 As shown, a connecting hole 222 is formed at the right end of the crankshaft 22 of the engine 20. The connecting hole 222 is extended in the left-right direction and the right end of the connecting hole 222 extends to the right through the right end surface of the crankshaft 22. Furthermore, a threaded structure is provided on the hole wall of the connecting hole 222, and the stud 71 of the fixing bolt 70 can be threadedly engaged in the connecting hole 222.

[0095] For example, the side surface of the screw head 72 of the fixing bolt 70 facing the stud 71 can abut against the shoulder 1421 on the inner wall surface of the connecting bracket 14 in the axial direction of the crankshaft 22; for another example, the side surface of the screw head 72 of the fixing bolt 70 facing the stud 71 can abut against the end of the connecting key 60 facing away from the housing 21 in the axial direction of the crankshaft 22; for another example, the side surface of the screw head 72 of the fixing bolt 70 facing the stud 71 can abut against the shoulder 1421 on the inner wall surface of the connecting bracket 14 and the end of the connecting key 60 facing away from the housing 21 in the axial direction of the crankshaft 22.

[0096] In this embodiment, a connecting hole 222 is formed at one end of the crankshaft 22, and the connecting hole 222 extends along the axial direction of the crankshaft 22 and passes through the end face of one end of the crankshaft 22, and a fixing bolt 70 is provided in the power system 100, and the stud 71 of the fixing bolt 70 is threadedly engaged in the connecting hole 222, and the screw head 72 of the fixing bolt 70 abuts against the shoulder 1421 on the inner wall surface of the connecting bracket 14 and / or the end of the connecting key 60 facing away from the housing 21 in the axial direction of the crankshaft 22, which can make the connection between the crankshaft 22 and the connecting bracket 14 more stable, thereby further improving the reliability of the connection between the crankshaft 22 and the connecting bracket 14.

[0097] In one embodiment of the present invention, Figure 4 As shown, a first inclined surface 223 is formed on the outer surface of one end of the crankshaft 22. In the direction from the case 21 toward the shell 11 along the axial direction of the crankshaft 22, the first inclined surface 223 extends obliquely toward the central axis of the crankshaft 22, and a second inclined surface 1422 parallel to and fitted with the first inclined surface 223 is formed on the inner wall surface of the connecting bracket 14.

[0098] In some specific examples, such as Figure 4 As shown, a first inclined surface 223 is formed on the lower outer surface of the right end of the crankshaft 22, and the first inclined surface 223 is a plane. In the direction from left to right, the first inclined surface 223 is inclined and extends toward the central axis of the crankshaft 22, and the second inclined surface 1422 on the inner wall surface of the connecting bracket 14 can be parallel to the first inclined surface 223.

[0099] Thus, when the connecting bracket 14 is installed on the right end of the crankshaft 22, it can play a guiding role in the installation, thereby facilitating the operation. Under the fixing action of the fastening bolts, the connecting bracket 14 can be installed in place, thereby ensuring that the crankshaft 22 and the connecting bracket 14 are relatively fixed, and the rotor 12 of the generator 10 is positioned, thereby effectively ensuring that the crankshaft 22 of the engine 20 and the rotor 12 of the generator 10 are installed concentrically.

[0100] In this embodiment, a first inclined surface 223 is formed on the outer surface of one end of the crankshaft 22. In the direction from the case 21 toward the shell 11 along the axial direction of the crankshaft 22, the first inclined surface 223 extends obliquely toward the central axis of the crankshaft 22. A second inclined surface 1422 parallel to and fitted with the first inclined surface 223 is formed on the inner wall surface of the connecting bracket 14. This can facilitate the installation and positioning of the rotor 12 of the generator 10, and can effectively ensure that the crankshaft 22 of the engine 20 and the rotor 12 of the generator 10 are installed concentrically, thereby effectively ensuring the installation effect.

[0101] In one embodiment of the present invention, Figure 4-Figure 6 As shown, the connecting bracket 14 includes: an outer ring plate 141, an inner ring plate 142 and a connecting plate 143. The outer ring plate 141 and the inner ring plate 142 both extend along the axial direction of the rotor 12 and extend in a ring shape along the circumferential direction of the rotor 12. The outer ring plate 141 is arranged on the outer side of the inner ring plate 142 in the radial direction of the rotor 12. The connecting plate 143 is connected between the outer ring plate 141 and the inner ring plate 142. The inner ring plate 142 is fixed to the crankshaft 22, and the rotor 12 is sleeved and fixed on the outer ring plate 141.

[0102] In some specific examples, such as Figure 4-Figure 6As shown, the outer ring plate 141 and the inner ring plate 142 are both extended in the left-right direction and extend in a ring shape along the circumference of the rotor 12. That is, the outer ring plate 141 and the inner ring plate 142 are both barrel-shaped structures. Furthermore, a connecting plate 143 is provided between the outer ring plate 141 and the inner ring plate 142. One end of the connecting plate 143 is fixedly connected to the inner circumferential surface of the outer ring plate 141, and the other end of the connecting plate 143 is fixedly connected to the outer circumferential surface of the inner ring plate 142.

[0103] For example Figure 4 and Figure 6 As shown, the right end of the crankshaft 22 is passed through the inner ring plate 142 and fixedly connected to the inner ring plate 142. The rotor 12 and the outer ring plate 141 are fixedly connected by a press-fitting process, and a locking ring is provided between the end of the rotor 12 and the end of the outer ring plate 141 to ensure the fixed connection between the rotor 12 and the outer ring plate 141.

[0104] In this embodiment, an outer ring plate 141, an inner ring plate 142 and a connecting plate 143 are provided in the connecting bracket 14. The outer ring plate 141 and the inner ring plate 142 both extend in the axial direction of the rotor 12 and extend in a ring shape in the circumferential direction of the rotor 12. The outer ring plate 141 is arranged on the radially outer side of the inner ring plate 142 of the rotor 12, and the connecting plate 143 is connected between the outer ring plate 141 and the inner ring plate 142. The inner ring plate 142 is fixed to the crankshaft 22, and the rotor 12 is sleeved and fixed on the outer ring plate 141. This can effectively optimize the structural construction of the connecting bracket 14, so that the stress between the rotor 12 and the outer ring plate 141 is evenly distributed, and the stress between the crankshaft 22 and the inner ring plate 142 is evenly distributed, thereby effectively improving the reliability and durability of the connecting bracket 14.

[0105] In one embodiment of the present invention, Figure 1 and Figure 2 As shown, the shell 11 is open to one side of the box body 21, and the open side of the shell 11 is provided with a first flange portion 111, and the box body 21 is provided with a second flange portion 212. The first flange portion 111 and the second flange portion 212 are connected in the axial direction of the crankshaft 22 by fasteners.

[0106] In some specific examples, the first flange portion 111 and the second flange portion 212 are both provided with fixing holes arranged at intervals along the circumference of the crankshaft 22, and the fixing holes on the first flange portion 111 and the fixing holes on the second flange portion 212 are arranged one by one correspondingly, and fasteners are provided in the fixing holes, so that the first flange portion 111 and the second flange portion 212 can be reliably fixed together.

[0107] In this embodiment, a first flange portion 111 is provided on the open side of the shell 11, and a second flange portion 212 is provided on the box body 21. The first flange portion 111 and the second flange portion 212 are connected to each other in the axial direction of the crankshaft 22 by fasteners. The first flange portion 111 and the second flange portion 212 can be reliably fixed together, thereby effectively ensuring the fixing effect between the engine 20 and the generator 10, and further effectively improving the stability and reliability of the power system 100.

[0108] In one embodiment of the present invention, Figure 1 and Figure 2 As shown, in the axial direction of the crankshaft 22, the side wall of the housing 11 facing away from the engine 20 is an end cover 112, and a mounting portion 1121 is formed on the end cover 112. The mounting portion 1121 is cylindrical and extends along the axis of the crankshaft 22. A bearing 80 is provided on the inner side of the mounting portion 1121, and one end of the crankshaft 22 is fitted in the bearing 80. Alternatively, the generator 10 includes a connecting bracket 14, and the rotor 12 is sleeved on the outer side of the connecting bracket 14. One end of the crankshaft 22 is fixed to the connecting bracket 14. The connecting bracket 14 has a support portion 144 extending toward the mounting portion 1121, and one end of the support portion 144 is passed through the bearing 80.

[0109] In some specific examples, such as Figure 1 and Figure 2 As shown, the right side wall of the housing 11 is an end cover 112. Further, the end cover 112 is detachably connected to the housing 11 by bolts. A mounting portion 1121 is formed on the side wall of the end cover 112 facing the engine 20. The mounting portion 1121 is a barrel-shaped structure extending in the left-right direction.

[0110] Furthermore, a first connecting portion 11211 is provided on the mounting portion 1121, and the first connecting portion 11211 extends in a ring shape along the circumference of the crankshaft 22. In some specific examples, such as Figure 1 As shown, the connecting bracket 14 has a support portion 144 extending toward the mounting portion 1121, the outer ring of the bearing 80 is pressed onto the inner circumferential surface of the first connecting portion 11211 of the mounting portion 1121, the inner ring of the bearing 80 is sleeved on the outer circumferential surface of the right end of the support portion 144, and the inner ring of the bearing 80 is fixedly connected to the support portion 144.

[0111] In other specific examples, such as Figure 2 As shown, the outer ring of the bearing 80 is pressed onto the inner circumferential surface of the first connecting portion 11211 of the mounting portion 1121, and the inner ring of the bearing 80 is sleeved on the outer circumferential surface of the right end of the crankshaft 22, and the inner ring of the bearing 80 is fixedly connected to the crankshaft 22.

[0112] In this embodiment, by fitting one end of the crankshaft 22 into the bearing 80, or inserting one end of the support portion 144 of the connecting bracket 14 into the bearing 80, the mounting portion 1121 of the end cap 112 can provide a reliable support point for the crankshaft 22 or the support portion 144 of the connecting bracket 14, thereby effectively increasing the stability of the power system 100. Furthermore, the frictional resistance during the rotation of the crankshaft 22 or the connecting bracket 14 can be effectively reduced, thereby effectively improving the efficiency of power transmission.

[0113] In one embodiment of the present invention, Figure 1 and Figure 2 As shown, the power system 100 further includes a resolver device 90 , which is sleeved on the outside of the support portion 144 or the crankshaft 22 and spaced apart from the bearing 80 in the axial direction of the crankshaft 22 .

[0114] It should be noted that resolver device 90 is a sensor that can be used to monitor the position and speed of rotor 12 of generator 10, ensuring synchronous and stable operation of generator 10. By monitoring the position and speed of rotor 12 in real time, resolver device 90 can provide key control parameters, helping to adjust the output power and frequency of generator 10, ensuring stable and efficient operation of generator 10.

[0115] For example Figure 1 and Figure 2 As shown, the mounting portion 1121 is provided with a second connecting portion 11212, the second connecting portion 11212 extends in a ring shape along the circumference of the crankshaft 22, and the second connecting portion 11212 is provided on the left side of the first connecting portion 11211. In some specific examples, such as Figure 1 As shown, the outer ring of the rotating device 90 is pressed onto the inner circumference of the second connecting portion 11212 of the mounting portion 1121, and the inner ring of the rotating device 90 is sleeved on the outer circumference of the right end of the support portion 144, and the inner ring of the rotating device 90 is fixedly connected to the support portion 144.

[0116] In other specific examples, such as Figure 2 As shown, the outer ring of the resolver device 90 is pressed onto the inner circumferential surface of the second connecting portion 11212 of the mounting portion 1121, and the inner ring of the resolver device 90 is sleeved on the outer circumferential surface of the right end of the crankshaft 22, and the inner ring of the resolver device 90 is fixedly connected to the crankshaft 22.

[0117] In this embodiment, a resolver device 90 is provided in the power system 100. The resolver device 90 is sleeved on the outer side of the support portion 144 or the crankshaft 22 and is spaced apart from the bearing 80 in the axial direction of the crankshaft 22. This allows for real-time monitoring of the position and speed of the rotor 12, thereby helping to adjust the output power and frequency of the generator 10, thereby effectively improving the operating efficiency and stability of the generator 10.

[0118] The vehicle according to the second embodiment of the present invention includes the power system 100 according to the first embodiment of the present invention.

[0119] According to the vehicle of the embodiment of the present invention, by providing the power system 100 of the first aspect described above, not only can the sealing effect of the engine 20 and the generator 10 be effectively ensured, and the risk of leakage of the medium inside the power system 100 be reduced, but the first oil seal 30 and the second oil seal 40 can also be effectively protected, thereby effectively improving the reliability of the power system 100.

[0120] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" 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, rather than indicating or implying 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 limiting the present invention.

[0121] 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 number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0122] In the present invention, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0123] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0124] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A power system (100), characterized in that: include: A generator (10), the generator (10) comprising a housing (11) and a rotor (12) disposed within the housing (11); An engine (20), the engine (20) comprising a housing (21) and a crankshaft (22) disposed in the housing (21), the housing (21) being provided with a through hole, one end of the crankshaft (22) passing through the through hole and being fixed to the rotor (12); A first oil seal (30) and a second oil seal (40) are sleeved on the crankshaft (22) and arranged at intervals along the axial direction of the crankshaft (22). The first oil seal (30) and the second oil seal (40) are in sealing contact with the inner wall of the through hole. A ventilation channel (211) is formed on the box body (21), one end of the ventilation channel (211) passes through the outer surface of the box body (21), and the other end of the ventilation channel (211) passes through the inner wall of the through hole and is located between the first oil seal (30) and the second oil seal (40).

2. The power system (100) according to claim 1, characterized in that The first oil seal (30) and the second oil seal (40) are symmetrically arranged in the axial direction of the crankshaft (22).

3. The power system (100) according to claim 1, characterized in that Also includes: A breathable member (50) blocks the breathable passage (211) and is configured to allow only gas to pass through the breathable member (50).

4. The power system (100) according to claim 3, characterized in that The air permeable member (50) is provided at one end of the air permeable channel (211) away from the through hole.

5. The power system (100) according to claim 4, characterized in that The air permeable channel (211) comprises a main section (2111) and an assembly section (2112). The main section (2111) extends in the radial direction of the crankshaft (22), and one end of the main section passes through the inner wall of the through hole. The assembly section (2112) is connected to the end of the main section (2111) away from the through hole and extends in the radial direction of the crankshaft (22) to pass through the outer wall of the housing (21). The diameter of the assembly section (2112) is greater than the diameter of the main body section (2111), and the breathable member (50) is arranged outside the box body (21), with a portion of it sealed inside the assembly section (2112).

6. The power system (100) according to claim 3, characterized in that The air-permeable member (50) is a vent plug.

7. The power system (100) according to any one of claims 1 to 6, characterized in that: The generator (10) further comprises: a connecting bracket (14), the connecting bracket (14) being annular, one end of the crankshaft (22) being passed through the inner side of the connecting bracket (14) and being fixedly connected to the connecting bracket (14), and the rotor (12) being sleeved and fixedly connected to the outer side of the connecting bracket (14).

8. The power system (100) according to claim 7, characterized in that The crankshaft (22) and the connecting bracket (14) are connected via a connecting key (60), and the number of the connecting key (60) is one or a plurality of connecting keys (60) arranged at intervals along the circumference of the crankshaft (22).

9. The power system (100) according to claim 8, characterized in that A first groove is formed on the outer peripheral surface of the crankshaft (22), a second groove is formed on the inner wall surface of the connecting bracket (14), and the connecting key (60) is adapted to the shapes of the first groove and the second groove, with one part fitting in the first groove and the other part fitting in the second groove.

10. The power system (100) according to claim 8, characterized in that The connecting key (60) and the connecting bracket (14) are integrally formed, and the crankshaft (22) is formed with a keyway that matches the shape of the connecting key (60).

11. The power system (100) according to claim 10, characterized in that A boss (221) is formed on the outer surface of one end of the crankshaft (22), and the boss (221) extends along the axial direction of the crankshaft (22). A protruding retaining rib (2211) is formed on the end of the boss (221) facing the housing (21), and the retaining rib (2211) cooperates with the boss (221) to define the keyway.

12. The power system (100) according to claim 7, characterized in that A connecting hole (222) is formed at one end of the crankshaft (22), and the connecting hole (222) extends along the axial direction of the crankshaft (22) and passes through the end surface of the one end of the crankshaft (22). The power system (100) further comprises a fixing bolt (70), wherein the stud (71) of the fixing bolt (70) is threadedly engaged in the connecting hole (222), and the screw head (72) of the fixing bolt (70) abuts against a shoulder (1421) on the inner wall surface of the connecting bracket (14) and / or an end of the connecting key (60) facing away from the housing (21) in the axial direction of the crankshaft (22).

13. The power system (100) according to claim 12, characterized in that A first inclined surface (223) is formed on the outer surface of the one end of the crankshaft (22), and in a direction from the case (21) toward the housing (11) along the axial direction of the crankshaft (22), the first inclined surface (223) extends obliquely toward the central axis of the crankshaft (22). A second inclined surface (1422) is formed on the inner wall surface of the connecting bracket (14) and is parallel to and in contact with the first inclined surface (223).

14. The power system (100) according to claim 7, characterized in that The connecting bracket (14) comprises an outer ring plate (141), an inner ring plate (142) and a connecting plate (143). The outer ring plate (141) and the inner ring plate (142) both extend in the axial direction of the rotor (12) and extend in a ring shape in the circumferential direction of the rotor (12). The outer ring plate (141) is arranged on the outer side of the inner ring plate (142) in the radial direction of the rotor (12). The connecting plate (143) is connected between the outer ring plate (141) and the inner ring plate (142). The inner ring plate (142) is fixed to the crankshaft (22), and the rotor (12) is sleeved and fixed on the outer ring plate (141).

15. The power system (100) according to claim 1, characterized in that The shell (11) is open toward one side of the case (21); a first flange portion (111) is provided on the open side of the shell (11); the case (21) is provided with a second flange portion (212); the first flange portion (111) and the second flange portion (212) are butt-jointed in the axial direction of the crankshaft (22) via fasteners.

16. The power system (100) according to claim 1, characterized in that In the axial direction of the crankshaft (22), the side wall of the housing (11) facing away from the engine (20) is an end cover (112), and a mounting portion (1121) is formed on the end cover (112). The mounting portion (1121) is cylindrical and extends along the axis of the crankshaft (22). A bearing (80) is provided on the inner side of the mounting portion (1121). The one end of the crankshaft (22) is fitted into the bearing (80), or the generator (10) includes a connecting bracket (14), the rotor (12) is sleeved on the outside of the connecting bracket (14), the one end of the crankshaft (22) is fixed to the connecting bracket (14), and the connecting bracket (14) has a supporting portion (144) extending toward the mounting portion (1121), and one end of the supporting portion (144) is passed through the bearing (80).

17. The power system (100) according to claim 16, characterized in that The invention also includes a rotary device (90), which is sleeved on the outer side of the support portion (144) or the crankshaft (22) and is spaced apart from the bearing (80) in the axial direction of the crankshaft (22).

18. A vehicle, characterized in that: Comprising a power system (100) according to any one of claims 1-17.

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