Crankshaft assembly of engine, engine and vehicle

Abstract

The invention discloses a crankshaft assembly of an engine, the engine and a vehicle, and relates to the technical field of engines, the crankshaft assembly comprises a crankshaft, a first rolling bearing, a second rolling bearing and a sliding bearing, the crankshaft comprises a plurality of crankshaft body sections and a connecting rod journal section, and the crankshaft body sections are sequentially arranged at intervals in the length direction of the crankshaft; a connecting rod journal section is connected between any two adjacent crankshaft body sections, at least one crankshaft body section is sleeved with a first rolling bearing, the first rolling bearing is used for being connected with an engine body of an engine, the connecting rod journal section is sleeved with a second rolling bearing, and the second rolling bearing is used for being connected with a crankshaft connecting rod of the engine. At least one crankshaft body section is sleeved with a sliding bearing, and the sliding bearing is used for being connected with an engine body. According to the crankshaft assembly, the energy loss can be reduced, the mechanical loss of an engine is effectively reduced, and the efficiency of the engine is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of engines, and in particular to a crankshaft assembly of an engine, an engine and a vehicle. Background Art

[0002] In the related technologies, with the development of society, people have higher and higher requirements on the power and economy of engines, and need to increase the output power of engines while ensuring a certain displacement. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a crankshaft assembly of an engine, which can reduce energy loss, effectively reduce mechanical loss of the engine, and help improve engine efficiency.

[0004] The present invention also provides an engine using the crankshaft assembly.

[0005] The present invention further provides a vehicle using the engine.

[0006] According to the first aspect of the present invention, the crankshaft assembly of the engine comprises: a crankshaft, a first rolling bearing, a second rolling bearing and a sliding bearing, the crankshaft comprises a plurality of crankshaft body sections and connecting rod journal sections, the plurality of crankshaft body sections are arranged in sequence along the length direction of the crankshaft, a connecting rod journal section is connected between any two adjacent crankshaft body sections, at least one crankshaft body section is sleeved with the first rolling bearing, the first rolling bearing is used to be connected to the engine body of the engine, the connecting rod journal section is sleeved with the second rolling bearing, the second rolling bearing is used to be connected to the crankshaft connecting rod of the engine, and at least one crankshaft body section is sleeved with the sliding bearing, the sliding bearing is used to be connected to the engine body.

[0007] The crankshaft assembly of the engine according to the embodiment of the present application can reduce energy loss, effectively reduce the mechanical loss of the engine, and help improve the engine efficiency.

[0008] According to some embodiments of the present invention, the first rolling bearing includes: a first outer liner ring, a first inner liner ring, a first mounting ring and a plurality of first rollers, the first outer liner ring is sleeved on the first inner liner ring, and the first outer liner ring is spaced apart from the first inner liner ring to form a first mounting space between the first inner liner ring and the first outer liner ring, the first mounting ring is sleeved on the first inner liner ring and is located in the first mounting space, a plurality of the first rollers are all located in the first mounting space, and a plurality of the first rollers can be rotatably disposed on the first mounting ring, a plurality of the first rollers are arranged in sequence along the circumference of the first inner liner ring, and a plurality of the first rollers are all in contact with the first outer liner ring and the first inner liner ring.

[0009] According to some embodiments of the present invention, the first outer liner ring is formed with a first oil inlet hole, the first oil inlet hole is communicated with the first installation space, and the first oil inlet hole is used to be arranged corresponding to the oil supply port on the engine body.

[0010] According to some embodiments of the present invention, an oil collecting groove is formed on a surface of the first outer liner ring facing the first inner liner ring, the oil collecting groove extends along the circumference of the first outer liner ring, and the first oil inlet hole is formed on a bottom wall of the oil collecting groove.

[0011] According to some embodiments of the present invention, the first outer lining ring includes a first sub-outer lining ring and a second sub-outer lining ring, and the first sub-outer lining ring and the second sub-outer lining ring are detachably connected to form the first annular outer lining ring, the first inner lining ring includes a first sub-inner lining ring and a second sub-inner lining ring, and the first sub-inner lining ring and the second sub-inner lining ring are detachably connected to form the first annular inner lining ring, the first mounting ring includes a first sub-mounting ring and a second sub-mounting ring, and the first sub-mounting ring and the second sub-mounting ring are detachably connected to form the first annular mounting ring, the first sub-outer lining ring is arranged around the first sub-inner lining ring, the first sub-mounting ring is located between the first sub-outer lining ring and the first sub-inner lining ring, and the first sub-mounting ring is provided with a part of the first rollers, the second sub-outer lining ring is arranged around the second sub-inner lining ring, the second sub-mounting ring is located between the second sub-outer lining ring and the second sub-inner lining ring, and the second sub-mounting ring is provided with another part of the first rollers.

[0012] According to some embodiments of the present invention, the second rolling bearing includes: a second outer liner ring, a second inner liner ring, a second mounting ring and a plurality of second rollers, the second outer liner ring is sleeved on the second inner liner ring, and the second outer liner ring is spaced apart from the second inner liner ring to form a second mounting space between the second inner liner ring and the second outer liner ring, the second mounting ring is sleeved on the second inner liner ring and is located in the second mounting space, a plurality of second rollers are all located in the second mounting space, and a plurality of second rollers can be rotatably disposed on the second mounting ring, a plurality of second rollers are arranged in sequence along the circumference of the second inner liner ring, and a plurality of second rollers are all in contact with the second outer liner ring and the second inner liner ring.

[0013] According to some embodiments of the present invention, the second inner liner ring is formed with a second oil inlet hole, the second oil inlet hole is communicated with the second installation space, and the second oil inlet hole is communicated with the oil flow channel on the crankshaft.

[0014] According to some embodiments of the present invention, the second outer lining ring includes a third sub-outer lining ring and a fourth sub-outer lining ring, and the third sub-outer lining ring and the fourth sub-outer lining ring are detachably connected to form the second outer lining ring in an annular shape. The second inner lining ring includes a third sub-inner lining ring and a fourth sub-inner lining ring, and the third sub-inner lining ring and the fourth sub-inner lining ring are detachably connected to form the second inner lining ring in an annular shape. The second mounting ring includes a third sub-mounting ring and a fourth sub-mounting ring, and the third sub-mounting ring and the fourth sub-mounting ring are detachably connected to form the second mounting ring in an annular shape. The third sub-outer lining ring is arranged around the third sub-inner lining ring, and the third sub-mounting ring is located between the third sub-outer lining ring and the third sub-inner lining ring, and the third sub-mounting ring is provided with a part of the second rollers. The fourth sub-outer lining ring is arranged around the fourth sub-inner lining ring, and the fourth sub-mounting ring is located between the fourth sub-outer lining ring and the fourth sub-inner lining ring, and the fourth sub-mounting ring is provided with another part of the second rollers.

[0015] According to some embodiments of the present invention, the crankshaft is formed with an oil flow channel, the oil flow channel is used to be arranged corresponding to the oil supply port on the engine body, and the oil flow channel is connected to the second rolling bearing.

[0016] According to some embodiments of the present invention, the oil flow channel includes: an oil inlet flow channel, a connecting flow channel and a branch flow channel. The crankshaft body section corresponding to the sliding bearing forms the oil inlet flow channel, the connecting rod journal section forms a branch flow channel, the connecting flow channel extends along the length direction of the crankshaft, and the connecting flow channel connects the branch flow channel and the oil inlet flow channel.

[0017] According to some embodiments of the present invention, the connecting flow channel includes a plurality of sub-flow channel segments, which are connected in sequence along the length direction of the crankshaft, and any two adjacent sub-flow channel segments are connected by bending, and the connection between two adjacent sub-flow channel segments is connected to the corresponding branch flow channel.

[0018] The engine according to the second aspect of the present invention comprises the crankshaft assembly of the engine described in the above embodiment.

[0019] A vehicle according to an embodiment of the third aspect of the present invention comprises the engine described in the above embodiment.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 is a cross-sectional view of the crankshaft, the first rolling bearing, the sliding bearing and the engine body assembled according to an embodiment of the present application;

[0023] Figure 2 is a cross-sectional view of the assembly of the crankshaft and the second rolling bearing and the arrangement of the oil flow channel according to an embodiment of the present application;

[0024] Figure 3 is a cross-sectional view of a first sub-rolling bearing according to an embodiment of the present application;

[0025] Figure 4 is a cross-sectional view of a first sub-outer liner ring according to an embodiment of the present application;

[0026] Figure 5 is a cross-sectional view of a second sub-rolling bearing according to an embodiment of the present application;

[0027] Figure 6 is a cross-sectional view of a third sub-rolling bearing according to an embodiment of the present application;

[0028] Figure 7 is a cross-sectional view of a third sub-liner ring according to an embodiment of the present application;

[0029] Figure 8 It is a cross-sectional view of the fourth sub-rolling bearing according to an embodiment of the present application.

[0030] Reference numerals:

[0031] Crankshaft 10, crankshaft body section 11, connecting rod journal section 12,

[0032] first rolling bearing 20, first roller 21, first installation space 22, first oil inlet hole 23, oil collecting groove 24, first sub-rolling bearing 25, first sub-outer liner ring 251, first sub-inner liner ring 252, first sub-installation ring 253, second sub-rolling bearing 26, second sub-outer liner ring 261, second sub-inner liner ring 262, second sub-installation ring 263,

[0033] second rolling bearing 30, second roller 31, second installation space 32, second oil inlet hole 33, third sub-rolling bearing 34, third sub-outer liner ring 341, third sub-inner liner ring 342, third sub-installation ring 343, fourth sub-rolling bearing 35, fourth sub-outer liner ring 351, fourth sub-inner liner ring 352, fourth sub-installation ring 353,

[0034] Sliding bearing 40,

[0035] Oil flow channel 50, oil inlet flow channel 51, connecting flow channel 52, sub-flow channel section 521, branch flow channel 53,

[0036] The engine body 100 and the crankshaft connecting rod 200 are shown. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] Reference below Figure 1-Figure 8 The crankshaft assembly of the engine according to the embodiment of the present invention is described, the crankshaft assembly is provided in the engine, and the engine is installed on a vehicle. Of course, the present invention is not limited thereto, and the engine with the crankshaft assembly can also be installed on other mechanical devices using the engine, such as: ships, airplanes, etc. The embodiment of the present application is described by taking the engine with the crankshaft assembly installed on a vehicle as an example.

[0039] The crankshaft assembly of the engine according to the first aspect of the present invention is as follows: Figure 1 and Figure 2As shown, the crankshaft assembly may include: a crankshaft 10, a first rolling bearing 20, a second rolling bearing 30 and a sliding bearing 40. The crankshaft 10 includes a plurality of crankshaft body sections 11 and a connecting rod journal section 12. The plurality of crankshaft body sections 11 are arranged in sequence along the length direction of the crankshaft 10. A connecting rod journal section 12 is connected between any two adjacent crankshaft body sections 11. At least one crankshaft body section 11 is provided with a first rolling bearing 20, which is used to be connected to an engine body 100 of an engine. The connecting rod journal section 12 is provided with a second rolling bearing 30, which is used to be connected to a crankshaft connecting rod 200 of an engine. At least one crankshaft body section 11 is provided with a sliding bearing 40, which is used to be connected to an engine body 100.

[0040] It should be noted that in the relevant technologies, with the development of society, people have higher and higher requirements on the power and economy of engines, and need to increase the output power of the engine while ensuring a certain displacement.

[0041] Based on this, the embodiment of the present application proposes a crankshaft assembly of an engine, wherein the crankshaft 10 may include a plurality of crankshaft body segments 11 and a plurality of connecting rod journal segments 12, wherein the plurality of crankshaft body segments 11 and the plurality of connecting rod journal segments 12 may be integrally formed, and the plurality of crankshaft body segments 11 are sequentially arranged at intervals along the length direction of the crankshaft 10. Figure 1 When the direction is set, the length direction of the crankshaft 10 is Figure 1 The X direction in the crankshaft 10. A plurality of connecting rod journal segments 12 are sequentially arranged at intervals along the length direction of the crankshaft 10, and a plurality of crankshaft body segments 11 are coaxially arranged, and the central axis of each connecting rod journal segment 12 is parallel to the length direction of the crankshaft 10. A connecting rod journal segment 12 is connected between any two adjacent crankshaft body segments 11, and a crankshaft body segment 11 is provided at each end of the crankshaft 10, and the number of crankshaft body segments 11 on the crankshaft 10 is one more than the number of connecting rod journal segments 12.

[0042] At least one crankshaft body section 11 is sleeved with a first rolling bearing 20, and the first rolling bearing 20 can be interference fit with the corresponding crankshaft body section 11, so as to ensure that the first rolling bearing 20 and the corresponding crankshaft body section 11 do not rotate relative to each other and are tightly fitted. The first rolling bearing 20 can be connected to the engine body 100 of the engine, the first rolling bearing 20 can directly abut against the engine body 100 to limit the position, the first rolling bearing 20 can be interference fit with the engine body 100, and the first rolling bearing 20 and the engine body 100 do not rotate relative to each other. The first rolling bearing 20 can play a role in transmitting loads, and the first rolling bearing 20 has a low friction coefficient, which can reduce friction, help reduce energy loss, and thus effectively reduce the mechanical loss of the engine.

[0043] Each connecting rod journal section 12 is sleeved with a second rolling bearing 30, and the second rolling bearing 30 can be interference fit with the corresponding connecting rod journal section 12, so as to ensure that the second rolling bearing 30 and the corresponding connecting rod journal section 12 do not rotate relative to each other and are tightly fitted. The second rolling bearing 30 can be connected to the crankshaft connecting rod 200 of the engine, and the crankshaft connecting rod 200 of the engine can be sleeved on the second rolling bearing 30. The second rolling bearing 30 can play a role in transmitting load, and the second rolling bearing 30 has a low friction coefficient, which can reduce friction, help reduce energy loss, and thus effectively reduce the mechanical loss of the engine.

[0044] At least one crankshaft body section 11 is sleeved with a sliding bearing 40, and the sliding bearing 40 can be interference fit with the corresponding crankshaft body section 11, so as to ensure that the sliding bearing 40 is arranged on the corresponding crankshaft body section 11, and the sliding bearing 40 can be tightly matched with the corresponding crankshaft body section 11. The sliding bearing 40 can be connected to the engine body 100 through a bearing shell. At least one crankshaft body section 11 is sleeved with a first rolling bearing 20, and at least one crankshaft body section 11 is sleeved with a sliding bearing 40. This application is described by taking one crankshaft body section 11 as being sleeved with a sliding bearing 40, and the other crankshaft body sections 11 as being sleeved with a first rolling bearing 20.

[0045] Compared with the prior art, the embodiment of the present application replaces most of the sliding bearings 40 on the crankshaft 10 with a first rolling bearing 20 and a second rolling bearing 30. The friction coefficient of the first rolling bearing 20 and the second rolling bearing 30 is lower than the friction coefficient of the sliding bearing, which can reduce energy loss, effectively reduce the mechanical loss of the engine, and is conducive to improving the engine efficiency.

[0046] In some embodiments of the present invention, Figure 3-Figure 5 As shown, the first rolling bearing 20 may include: a first outer liner ring, a first inner liner ring, a first mounting ring and a plurality of first rollers 21, the first outer liner ring is sleeved on the first inner liner ring, and the first outer liner ring is spaced apart from the first inner liner ring to form a first mounting space 22 between the first inner liner ring and the first outer liner ring, the first mounting ring is sleeved on the first inner liner ring and is located in the first mounting space 22, a plurality of first rollers 21 are all located in the first mounting space 22, and a plurality of first rollers 21 can all be rotatably arranged on the first mounting ring, a plurality of first rollers 21 are arranged in sequence along the circumference of the first inner liner ring, and a plurality of first rollers 21 are all in contact with the first outer liner ring and the first inner liner ring.

[0047] The first rolling bearing 20 is sleeved on the crankshaft body section 11, the first outer liner ring can be connected to the engine body 100, and the first inner liner ring can be connected to the corresponding crankshaft body section 11. The first outer liner ring is sleeved on the first inner liner ring, the first outer liner ring and the first inner liner ring are coaxially arranged, the first outer liner ring is spaced from the first inner liner ring, and a first installation space 22 is formed between the first outer liner ring and the first inner liner ring. The first installation ring is sleeved on the first inner liner ring, and the first outer liner ring, the first inner liner ring and the first installation ring are coaxially arranged. The first installation ring is located in the first installation space 22, and a plurality of first rollers 21 are also located in the first installation space 22. The plurality of first rollers 21 are all installed on the first installation ring, and the plurality of first rollers 21 can roll on the first installation ring along the circumference of the first installation ring. The first installation ring can be provided with a plurality of first installation holes, and the plurality of first rollers 21 and the plurality of first installation holes are arranged one by one. The first rollers 21 are inserted into the corresponding first installation holes, thereby preventing the plurality of first rollers 21 from falling off from the first rolling bearing 20. The plurality of first rollers 21 are evenly arranged along the circumference of the first inner liner ring, and the first mounting ring can keep the spacing between any two first rollers 21 constant. The outer circumferential walls of the plurality of first rollers 21 can abut against the inner wall of the first outer liner ring, and the outer circumferential walls of the plurality of first rollers 21 can abut against the outer circumferential wall of the first inner liner ring, so as to realize the relative rotation between the first inner liner ring and the first outer liner ring.

[0048] In some embodiments of the present invention, Figure 3 and Figure 4 As shown, the first outer liner ring is formed with a first oil inlet hole 23 , the first oil inlet hole 23 is communicated with the first installation space 22 , and the first oil inlet hole 23 is used to be arranged corresponding to the oil supply port on the engine body 100 .

[0049] A first oil inlet hole 23 is formed on the first outer liner ring. The first oil inlet hole 23 can penetrate the first outer liner ring in the radial direction of the first outer liner ring, and the first oil inlet hole 23 can be communicated with the first installation space 22. An oil supply port is formed on the engine body 100. When the first rolling bearing 20 is connected to the engine body 100, the first oil inlet hole 23 is arranged corresponding to the oil supply port on the engine body 100, and the first oil inlet hole 23 is communicated with the oil supply port of the engine body 100. The lubricating oil in the engine body 100 can enter the first installation space 22 through the oil supply port and the first oil inlet hole 23, and the lubricating oil can lubricate the first rolling bearing 20, thereby reducing friction and dissipating heat, and can extend the service life of the first rolling bearing 20.

[0050] In some embodiments of the present invention, Figure 3 and Figure 4 As shown, an oil collecting groove 24 is formed on the surface of the first outer liner ring facing the first inner liner ring. The oil collecting groove 24 extends along the circumference of the first outer liner ring, and a first oil inlet hole 23 is formed on the bottom wall of the oil collecting groove 24 .

[0051] An oil collecting groove 24 is formed on the surface of the first outer liner ring facing the first inner liner ring. The oil collecting groove 24 is open toward the first inner liner ring. The width of the oil collecting groove 24 is smaller than the width of the first outer liner ring. The oil collecting groove 24 extends along the circumference of the first inner liner ring. A first oil inlet hole 23 is formed on the bottom wall of the oil collecting groove 24. The first oil inlet hole 23 is connected to the oil collecting groove 24. When the lubricating oil enters the first installation space 22 through the first oil inlet hole 23, the oil collecting groove 24 can be used to collect the lubricating oil leaked from the inside of the first rolling bearing 20 or the oil droplets caused by splash lubrication. The oil collecting groove 24 can realize the collection and utilization of the lubricating oil, ensure the continuous lubrication of the first rolling bearing 20, and improve the lubrication efficiency.

[0052] In some embodiments of the present invention, Figure 3-Figure 5 As shown, the first outer liner ring includes a first sub-outer liner ring 251 and a second sub-outer liner ring 261, and the first sub-outer liner ring 251 and the second sub-outer liner ring 261 are detachably connected to form an annular first outer liner ring, the first inner liner ring includes a first sub-inner liner ring 252 and a second sub-inner liner ring 262, and the first sub-inner liner ring 252 and the second sub-inner liner ring 262 are detachably connected to form an annular first inner liner ring, and the first mounting ring includes a first sub-mounting ring 253 and a second sub-mounting ring 263, and the first sub-mounting ring 253 and the second sub-mounting ring 263 are detachably docked to form a first annular mounting ring, the first sub-outer lining ring 251 is arranged around the first sub-inner lining ring 252, the first sub-mounting ring 253 is located between the first sub-outer lining ring 251 and the first sub-inner lining ring 252, the first sub-mounting ring 253 is provided with a portion of the first roller 21, the second sub-outer lining ring 261 is arranged around the second sub-inner lining ring 262, the second sub-mounting ring 263 is located between the second sub-outer lining ring 261 and the second sub-inner lining ring 262, the second sub-mounting ring 263 is provided with another portion of the first roller 21.

[0053] The first rolling bearing 20 can be constructed as a split structure, which is convenient for the first rolling bearing 20 to be installed on the crankshaft body section 11, which is beneficial to improving the installation efficiency of the first rolling bearing 20. The first outer liner ring can include a first sub-outer liner ring 251 and a second sub-outer liner ring 261. The first sub-outer liner ring 251 and the second sub-outer liner ring 261 are detachably connected. The first sub-outer liner ring 251 and the second sub-outer liner ring 261 can be connected by means of snap connection, bonding, etc., so as to form a ring-shaped first outer liner ring. As an example, a snap connection structure can be formed on the first sub-outer liner ring 251, and a snap groove can be formed on the second sub-outer liner ring 261. The snap connection structure and the snap groove are assembled together to achieve the connection between the first sub-outer liner ring 251 and the second sub-outer liner ring 261.

[0054] The first liner ring may include a first sub-liner ring 252 and a second sub-liner ring 262. The first sub-liner ring 252 and the second sub-liner ring 262 may be detachably connected to each other. The first sub-liner ring 252 and the second sub-liner ring 262 may be connected by snap connection, bonding, etc., so as to form an annular first liner ring. As an example, a snap connection structure may be formed on the first sub-liner ring 252, and a snap groove may be formed on the second sub-liner ring 262. The snap connection structure and the snap groove are assembled together to achieve the connection between the first sub-liner ring 252 and the second sub-liner ring 262.

[0055] The first mounting ring may include a first sub-mounting ring 253 and a second sub-mounting ring 263. The first sub-mounting ring 253 and the second sub-mounting ring 263 may be detachably connected to each other. The first sub-mounting ring 253 and the second sub-mounting ring 263 may be connected by means of snap connection, bonding, etc., so as to form an annular first mounting ring. As an example, a snap connection structure may be formed on the first sub-mounting ring 253, and a snap groove may be formed on the second sub-mounting ring 263. The snap connection structure and the snap groove are assembled in cooperation, so as to realize the connection between the first sub-mounting ring 253 and the second sub-mounting ring 263.

[0056] In the embodiment of the present application, the cross-sections of the first sub-outer liner ring 251 and the second sub-outer liner ring 261 can both be semicircular, and the first sub-outer liner ring 251 and the second sub-outer liner ring 261 can both be configured as half of the first outer liner ring, and the first sub-outer liner ring 251 and the second sub-outer liner ring 261 are butted together to form a first outer liner ring. The cross-sections of the first sub-inner liner ring 252 and the second sub-inner liner ring 262 can both be semicircular, and the first sub-inner liner ring 252 and the second sub-inner liner ring 262 can both be configured as half of the first inner liner ring, and the first sub-inner liner ring 252 and the second sub-inner liner ring 262 are butted together to form a first inner liner ring. The cross-sections of the first sub-mounting ring 253 and the second sub-mounting ring 263 can both be semicircular, and the first sub-mounting ring 253 and the second sub-mounting ring 263 can both be configured as half of the first mounting ring, and the first sub-mounting ring 253 and the second sub-mounting ring 263 are butted together to form a first mounting ring.

[0057] The first sub-outer liner ring 251 is arranged around the first sub-inner liner ring 252, the first sub-mounting ring 253 is located between the first sub-outer liner ring 251 and the first sub-inner liner ring 252, and the first sub-mounting ring 253 is provided with a part of the first roller 21. As an example, the first sub-outer liner ring 251 can be configured as half of the first outer liner ring, the first sub-inner liner ring 252 can be configured as half of the first inner liner ring, the first sub-mounting ring 253 can be configured as half of the first mounting ring, the end faces of the first sub-outer liner ring 251, the first sub-inner liner ring 252 and the first sub-mounting ring 253 can be aligned, and the first sub-outer liner ring 251, the first sub-inner liner ring 252, the first sub-mounting ring 253 and a part of the first roller 21 can be jointly configured as the first sub-rolling bearing 25.

[0058] The second sub-outer liner ring 261 is arranged around the second sub-inner liner ring 262, the second sub-mounting ring 263 is located between the second sub-outer liner ring 261 and the second sub-inner liner ring 262, and the second sub-mounting ring 263 is provided with another part of the first roller 21. As an example, the second sub-outer liner ring 261 can be configured as half of the first outer liner ring, the second sub-inner liner ring 262 can be configured as half of the first inner liner ring, the second sub-mounting ring 263 can be configured as half of the first mounting ring, the end faces of the second sub-outer liner ring 261, the second sub-inner liner ring 262 and the second sub-mounting ring 263 can be aligned, and the second sub-outer liner ring 261, the second sub-inner liner ring 262, the second sub-mounting ring 263 and another part of the first roller 21 can be jointly configured as the second sub-rolling bearing 26.

[0059] The first rolling bearing 20 can be composed of a first sub-rolling bearing 25 and a second sub-rolling bearing 26, and the first sub-rolling bearing 25 and the second sub-rolling bearing 26 can be butted to form the first rolling bearing 20. The first sub-rolling bearing 25 is arranged on the crankshaft body section 11 through the first sub-inner liner ring 252, and the second sub-rolling bearing 26 is arranged on the same crankshaft body section 11 through the second sub-inner liner ring 262. The first sub-rolling bearing 25 and the second sub-rolling bearing 26 can be fixedly connected by butting the first sub-outer liner ring 251 and the second sub-outer liner ring 261, the first sub-inner liner ring 252 and the second sub-inner liner ring 262, and the first sub-mounting ring 253 and the second sub-mounting ring 263, so as to achieve the effect that the first rolling bearing 20 is sleeved on the crankshaft body section 11.

[0060] The first oil inlet hole 23 and the oil collecting groove 24 can be both provided in the first sub-outer liner ring 251, or the first oil inlet hole 23 and the oil collecting groove 24 can be both provided in the second sub-outer liner ring 261. The embodiment of the present application is described by taking the first oil inlet hole 23 and the oil collecting groove 24 both provided in the first sub-outer liner ring 251 as an example.

[0061] In some embodiments of the present invention, Figure 6-Figure 8 As shown, the second rolling bearing 30 may include: a second outer liner ring, a second inner liner ring, a second mounting ring and a plurality of second rollers 31, the second outer liner ring is sleeved on the second inner liner ring, and the second outer liner ring is spaced apart from the second inner liner ring to form a second mounting space 32 between the second inner liner ring and the second outer liner ring, the second mounting ring is sleeved on the second inner liner ring and is located in the second mounting space 32, a plurality of second rollers 31 are all located in the second mounting space 32, and a plurality of second rollers 31 can all be rotatably arranged on the second mounting ring, a plurality of second rollers 31 are arranged in sequence along the circumference of the second inner liner ring, and a plurality of second rollers 31 are all in contact with the second outer liner ring and the second inner liner ring.

[0062] The second rolling bearing 30 is sleeved on the connecting rod journal section 12, the second outer liner ring can be connected to the crankshaft connecting rod 200 of the engine, and the second inner liner ring can be connected to the corresponding connecting rod journal section 12. The second outer liner ring is sleeved on the second inner liner ring, the second outer liner ring and the second inner liner ring are coaxially arranged, the second outer liner ring is spaced from the second inner liner ring, and a second installation space 32 is formed between the second outer liner ring and the second inner liner ring. The second installation ring is sleeved on the second inner liner ring, the second outer liner ring, the second inner liner ring and the second installation ring are coaxially arranged. The second installation ring is located in the second installation space 32, and a plurality of second rollers 31 are also located in the second installation space 32. The plurality of second rollers 31 are all installed on the second installation ring, and the plurality of second rollers 31 can roll on the second installation ring along the circumference of the second installation ring. The second mounting ring may be provided with a plurality of second mounting holes, and the plurality of second rollers 31 and the plurality of second mounting holes are provided one by one, and the second rollers 31 are inserted into the corresponding second mounting holes, thereby preventing the plurality of second rollers 31 from falling off the second rolling bearing 30. The plurality of second rollers 31 are evenly arranged along the circumference of the second inner liner ring, and the second mounting ring can keep the interval distance between any two second rollers 31 constant. The outer peripheral walls of the plurality of second rollers 31 can abut against the inner wall of the second outer liner ring, and the outer peripheral walls of the plurality of second rollers 31 can abut against the outer peripheral wall of the second inner liner ring, so that the plurality of second rollers 31 can roll along the circumference of the second inner liner ring, and realize the relative rotation between the second inner liner ring and the second outer liner ring.

[0063] In some embodiments of the present invention, Figure 6 and Figure 7 As shown, the second inner liner ring is formed with a second oil inlet hole 33 , the second oil inlet hole 33 is communicated with the second installation space 32 , and the second oil inlet hole 33 is communicated with the flow channel on the crankshaft 10 .

[0064] A second oil inlet hole 33 is formed on the second inner liner ring. The second oil inlet hole 33 can penetrate the second inner liner ring in the radial direction of the second inner liner ring, and the second oil inlet hole 33 can be communicated with the second installation space 32. A flow channel can be formed inside the crankshaft 10, and the lubricating oil can flow in the flow channel. When the second rolling bearing 30 is sleeved on the connecting rod journal section 12 of the crankshaft 10, the second oil inlet hole 33 can be set corresponding to the outlet of the flow channel on the crankshaft 10, and the second oil inlet hole 33 can be communicated with the flow channel on the crankshaft 10. The lubricating oil in the flow channel on the crankshaft 10 can enter the second installation space 32 through the outlet of the flow channel and the second oil inlet hole 33, and the lubricating oil can lubricate the second rolling bearing 30, thereby reducing friction and dissipating heat, and can extend the service life of the second rolling bearing 30.

[0065] In some embodiments of the present invention, Figure 6-Figure 8As shown, the second outer liner ring includes a third sub-outer liner ring 341 and a fourth sub-outer liner ring 351, and the third sub-outer liner ring 341 and the fourth sub-outer liner ring 351 are detachably connected to form an annular second outer liner ring. The second inner liner ring includes a third sub-inner liner ring 342 and a fourth sub-inner liner ring 352, and the third sub-inner liner ring 342 and the fourth sub-inner liner ring 352 are detachably connected to form an annular second inner liner ring. The second mounting ring includes a third sub-mounting ring 343 and a fourth sub-mounting ring 353. The third sub-mounting ring 343 and the fourth sub-mounting ring 353 is detachably docked to form a second annular mounting ring, the third sub-outer lining ring 341 is arranged around the third sub-inner lining ring 342, the third sub-mounting ring 343 is located between the third sub-outer lining ring 341 and the third sub-inner lining ring 342, the third sub-mounting ring 343 is provided with a portion of the second roller 31, the fourth sub-outer lining ring 351 is arranged around the fourth sub-inner lining ring 352, the fourth sub-mounting ring 353 is located between the fourth sub-outer lining ring 351 and the fourth sub-inner lining ring 352, the fourth sub-mounting ring 353 is provided with another portion of the second roller 31.

[0066] The second rolling bearing 30 can be constructed as a split structure, which is convenient for the second rolling bearing 30 to be installed on the connecting rod journal section 12, which is beneficial to improving the installation efficiency of the second rolling bearing 30. The second outer liner ring can include a third sub-outer liner ring 341 and a fourth sub-outer liner ring 351, and the third sub-outer liner ring 341 and the fourth sub-outer liner ring 351 are detachably connected, and the third sub-outer liner ring 341 and the fourth sub-outer liner ring 351 can be connected by means of snap connection, bonding, etc., so as to form a ring-shaped second outer liner ring. As an example, a snap connection structure can be formed on the third sub-outer liner ring 341, and a snap groove can be formed on the fourth sub-outer liner ring 351. The snap connection structure and the snap groove are assembled in cooperation, so as to realize the connection between the third sub-outer liner ring 341 and the fourth sub-outer liner ring 351.

[0067] The second liner ring may include a third sub-liner ring 342 and a fourth sub-liner ring 352, the third sub-liner ring 342 and the fourth sub-liner ring 352 are detachably connected, and the third sub-liner ring 342 and the fourth sub-liner ring 352 may be connected by snap connection, bonding, etc., so as to form an annular second liner ring. As an example, a snap connection structure may be formed on the third sub-liner ring 342, and a snap groove may be formed on the fourth sub-liner ring 352, and the snap connection structure and the snap groove are assembled in cooperation, so as to realize the connection between the third sub-liner ring 342 and the fourth sub-liner ring 352.

[0068] The second mounting ring may include a third sub-mounting ring 343 and a fourth sub-mounting ring 353, the third sub-mounting ring 343 and the fourth sub-mounting ring 353 are detachably connected, and the third sub-mounting ring 343 and the fourth sub-mounting ring 353 may be connected by means of snap connection, bonding, etc., so as to form an annular second mounting ring. As an example, a snap connection structure may be formed on the third sub-mounting ring 343, and a snap groove may be formed on the fourth sub-mounting ring 353, and the snap connection structure and the snap groove are assembled in cooperation, so as to realize the connection between the third sub-mounting ring 343 and the fourth sub-mounting ring 353.

[0069] In the embodiment of the present application, the cross-sections of the third sub-outer liner ring 341 and the fourth sub-outer liner ring 351 can both be semicircular, and the third sub-outer liner ring 341 and the fourth sub-outer liner ring 351 can both be configured as half of the second outer liner ring, and the third sub-outer liner ring 341 and the fourth sub-outer liner ring 351 are butt-jointed to form the second outer liner ring. The cross-sections of the third sub-inner liner ring 342 and the fourth sub-inner liner ring 352 can both be semicircular, and the third sub-inner liner ring 342 and the fourth sub-inner liner ring 352 can both be configured as half of the second inner liner ring, and the third sub-inner liner ring 342 and the fourth sub-inner liner ring 352 are butt-jointed to form the second inner liner ring. The cross-sections of the third sub-mounting ring 343 and the fourth sub-mounting ring 353 can both be semicircular, and the third sub-mounting ring 343 and the fourth sub-mounting ring 353 can both be configured as half of the second mounting ring, and the third sub-mounting ring 343 and the fourth sub-mounting ring 353 are butt-jointed to form the second mounting ring.

[0070] The third sub-outer liner ring 341 is arranged around the third sub-inner liner ring 342, the third sub-mounting ring 343 is located between the third sub-outer liner ring 341 and the third sub-inner liner ring 342, and the third sub-mounting ring 343 is provided with a part of the second roller 31. As an example, the third sub-outer liner ring 341 can be configured as half of the second outer liner ring, the third sub-inner liner ring 342 can be configured as half of the second inner liner ring, the third sub-mounting ring 343 can be configured as half of the second mounting ring, the end faces of the third sub-outer liner ring 341, the third sub-inner liner ring 342 and the third sub-mounting ring 343 can be aligned, and the third sub-outer liner ring 341, the third sub-inner liner ring 342, the third sub-mounting ring 343 and a part of the second roller 31 can be jointly configured as the third sub-rolling bearing 34.

[0071] The fourth sub-outer liner ring 351 is arranged around the fourth sub-inner liner ring 352, the fourth sub-mounting ring 353 is located between the fourth sub-outer liner ring 351 and the fourth sub-inner liner ring 352, and the fourth sub-mounting ring 353 is provided with another part of the second roller 31. As an example, the fourth sub-outer liner ring 351 can be configured as half of the second outer liner ring, the fourth sub-inner liner ring 352 can be configured as half of the second inner liner ring, the fourth sub-mounting ring 353 can be configured as half of the second mounting ring, the end faces of the fourth sub-outer liner ring 351, the fourth sub-inner liner ring 352 and the fourth sub-mounting ring 353 can be aligned, and the fourth sub-outer liner ring 351, the fourth sub-inner liner ring 352, the fourth sub-mounting ring 353 and another part of the second roller 31 can be configured as a fourth sub-rolling bearing 35.

[0072] The second rolling bearing 30 can be composed of a third sub-rolling bearing 34 and a fourth sub-rolling bearing 35, and the third sub-rolling bearing 34 and the fourth sub-rolling bearing 35 can be butted to form the second rolling bearing 30. The third sub-rolling bearing 34 is arranged on the connecting rod journal section 12 through the third sub-inner liner ring 342, and the fourth sub-rolling bearing 35 is arranged on the same connecting rod journal section 12 through the fourth sub-inner liner ring 352. The third sub-rolling bearing 34 and the fourth sub-rolling bearing 35 can be fixedly connected by butting the third sub-outer liner ring 341 and the fourth sub-outer liner ring 351, the third sub-inner liner ring 342 and the fourth sub-inner liner ring 352, and the third sub-mounting ring 343 and the fourth sub-mounting ring 353, so as to achieve the effect that the second rolling bearing 30 is sleeved on the connecting rod journal section 12.

[0073] The second oil inlet hole 33 may be disposed in the third sub-inner ring 342 , or the second oil inlet hole 33 may be disposed in the fourth sub-inner ring 352 . The embodiment of the present application is described by taking the second oil inlet hole 33 disposed in the third sub-inner ring 342 as an example.

[0074] In some embodiments of the present invention, Figure 2 As shown, the crankshaft 10 is formed with an oil flow channel 50 , and the oil flow channel 50 is used to be arranged corresponding to the oil supply port on the engine body 100 , and the oil flow channel 50 is connected to the second rolling bearing 30 .

[0075] An oil flow channel 50 is formed inside the crankshaft 10. The oil flow channel 50 has an oil flow channel inlet and an oil flow channel outlet. The oil flow channel 50 can be arranged corresponding to the oil supply port on the engine body 100. The lubricating oil in the engine body 100 can enter the oil flow channel 50 through the oil supply port and the oil flow channel inlet. The oil flow channel 50 is connected to the second rolling bearing 30. The oil flow channel 50 is connected to the second oil inlet hole 33. The lubricating oil can enter the second installation space 32 through the oil flow channel outlet and the second oil inlet hole 33, and the lubricating oil can lubricate the second rolling bearing 30. By setting the oil flow channel 50, the lubricating oil in the engine body 100 can lubricate the second rolling bearing 30.

[0076] In some embodiments of the present invention, Figure 2 As shown, the oil flow channel 50 may include: an oil inlet flow channel 51, a connecting flow channel 52 and a branch flow channel 53. The crankshaft body section 11 arranged corresponding to the sliding bearing 40 forms an oil inlet flow channel 51, and the connecting rod journal section 12 forms a branch flow channel 53. The connecting flow channel 52 extends along the length direction of the crankshaft 10, and the connecting flow channel 52 connects the branch flow channel 53 and the oil inlet flow channel 51.

[0077] The crankshaft body section 11 sleeved with the sliding bearing 40 is formed with an oil inlet channel 51, and the oil inlet channel 51 has an oil inlet channel inlet and an oil inlet channel outlet, and the lubricating oil can enter the oil inlet channel 51 through the sliding bearing 40. The connecting rod journal section 12 is formed with a branch channel 53, and there can be multiple branch channels 53, each of which has a branch channel inlet and a branch channel outlet, and each branch channel 53 has a second rolling bearing 30 correspondingly arranged therewith, and each branch channel outlet can be communicated with the second oil inlet hole 33, and the lubricating oil in the branch channel 53 can enter the second rolling bearing 30 through the branch channel outlet and the second oil inlet hole 33. The connecting channel 52 extends along the length direction of the crankshaft 10, and the connecting channel 52 connects the branch channel 53 and the oil inlet channel 51, and the connecting channel 52 can be communicated with multiple branch channels 53.

[0078] As an example, Figure 2 As shown, along the length direction of the crankshaft 10, the crankshaft body section 11 corresponding to the sliding bearing 40 can be arranged in the middle of the crankshaft 10, the oil inlet channel 51 can be arranged in the middle of the crankshaft 10, and the connecting channel 52 extends along the length direction of the crankshaft 10 toward both ends of the crankshaft 10, which is beneficial to reduce the flow distance of the lubricating oil inside the crankshaft 10, reduce the consumption of lubricating oil, increase the rate at which the lubricating oil flows to the branch channel 53, and improve the lubrication efficiency of the second rolling bearing 30.

[0079] In an embodiment of the present application, the sliding bearing 40 can be formed with a third oil inlet hole and an oil outlet hole. The lubricating oil in the engine body 100 can enter the sliding bearing 40 through the oil supply port and the third oil inlet hole. The lubricating oil can enter the oil inlet channel 51 through the oil outlet hole and the oil inlet channel inlet. The lubricating oil enters the connecting channel 52 through the oil inlet channel outlet. The lubricating oil flows in the connecting channel 52. The lubricating oil can enter the branch channel 53 through the branch channel inlet, and then enter the corresponding second rolling bearing 30 through the branch channel outlet and the second oil inlet hole 33, thereby achieving the effect of lubricating the second rolling bearing 30.

[0080] In some embodiments of the present invention, Figure 2As shown, the connecting flow channel 52 may include multiple sub-flow channel segments 521, which are connected in sequence along the length direction of the crankshaft 10, and any two adjacent sub-flow channel segments 521 are bent and connected, and the connection between two adjacent sub-flow channel segments 521 is connected to the corresponding branch flow channel 53.

[0081] Multiple sub-flow channel segments 521 are connected in sequence along the length direction of the crankshaft 10. The sub-flow channel segment 521 can extend from one connecting rod journal segment 12 to another adjacent connecting rod journal segment 12. The extension direction of the sub-flow channel segment 521 matches the structure of the crankshaft 10. The extension directions of two adjacent sub-flow channel segments 521 are different. Any two sub-flow channel segments 521 are connected in a bent manner. The connecting flow channel 52 can be connected to multiple branch flow channels 53. The sub-flow channel segment 521 can be connected between two adjacent branch flow channels 53. The connection between two adjacent sub-flow channel segments 521 is connected to the corresponding branch flow channel 53, so that the lubricating oil in the connecting flow channel 52 can be diverted to multiple branch flow channels 53, so that the lubricating oil can lubricate multiple second rolling bearings 30.

[0082] An engine according to an embodiment of the second aspect of the present invention comprises the crankshaft assembly of the engine in the above embodiment.

[0083] According to the engine of the embodiment of the present application, using the crankshaft assembly of the engine in the above embodiment can reduce the mechanical loss of the engine and improve the efficiency of the engine.

[0084] A vehicle according to an embodiment of the third aspect of the present invention comprises the engine in the above embodiment.

[0085] The vehicle according to the embodiment of the present application uses the engine in the above embodiment, which is beneficial to improving the fuel economy of the vehicle, reducing harmful emissions, and protecting the environment.

[0086] The crankshaft assembly of the engine, the other components and operations of the engine and the vehicle according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail herein.

[0087] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0088] Although the 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 present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A crankshaft assembly of an engine, characterized in that: include: A crankshaft (10), the crankshaft (10) comprising a plurality of crankshaft body sections (11) and connecting rod journal sections (12), the plurality of crankshaft body sections (11) being arranged in sequence and spaced apart along the length direction of the crankshaft (10), and one connecting rod journal section (12) being connected between any two adjacent crankshaft body sections (11); a first rolling bearing (20) and a second rolling bearing (30), wherein at least one of the crankshaft body sections (11) is sleeved with the first rolling bearing (20), the first rolling bearing (20) being used to be connected to an engine body (100) of the engine, and the connecting rod journal section (12) is sleeved with the second rolling bearing (30), the second rolling bearing (30) being used to be connected to a crankshaft connecting rod (200) of the engine; A sliding bearing (40), wherein at least one of the crankshaft body sections (11) is sleeved with the sliding bearing (40), and the sliding bearing (40) is used to be connected to the engine body (100).

2. The crankshaft assembly of the engine according to claim 1, characterized in that: The first rolling bearing (20) includes: a first outer liner ring, a first inner liner ring, a first mounting ring and a plurality of first rollers (21); the first outer liner ring is sleeved on the first inner liner ring, and the first outer liner ring is spaced apart from the first inner liner ring to form a first mounting space (22) between the first inner liner ring and the first outer liner ring; the first mounting ring is sleeved on the first inner liner ring and is located in the first mounting space (22); the plurality of first rollers (21) are all located in the first mounting space (22), and the plurality of first rollers (21) can all be rotatably disposed on the first mounting ring; the plurality of first rollers (21) are arranged in sequence along the circumference of the first inner liner ring, and the plurality of first rollers (21) are all in contact with the first outer liner ring and the first inner liner ring.

3. The crankshaft assembly of the engine according to claim 2, characterized in that: The first outer liner ring is formed with a first oil inlet hole (23), the first oil inlet hole (23) is communicated with the first installation space (22), and the first oil inlet hole (23) is used to be arranged corresponding to the oil supply port on the engine body (100).

4. The crankshaft assembly of the engine according to claim 3, characterized in that: An oil collecting groove (24) is formed on the surface of the first outer liner ring facing the first inner liner ring. The oil collecting groove (24) extends along the circumference of the first outer liner ring. The bottom wall of the oil collecting groove (24) is formed with the first oil inlet hole (23).

5. The crankshaft assembly of the engine according to claim 2, characterized in that: The first outer lining ring comprises a first sub-outer lining ring (251) and a second sub-outer lining ring (261), the first sub-outer lining ring (251) and the second sub-outer lining ring (261) are detachably connected to form the first annular outer lining ring; the first inner lining ring comprises a first sub-inner lining ring (252) and a second sub-inner lining ring (262), the first sub-inner lining ring (252) and the second sub-inner lining ring (262) are detachably connected to form the first annular inner lining ring; the first mounting ring comprises a first sub-mounting ring (253) and a second sub-mounting ring (263), the first sub-mounting ring (253) and the second sub-mounting ring (263) are detachably connected to form the first annular mounting ring; The first sub-outer liner ring (251) is arranged around the first sub-inner liner ring (252), the first sub-mounting ring (253) is located between the first sub-outer liner ring (251) and the first sub-inner liner ring (252), and the first sub-mounting ring (253) is provided with a portion of the first roller (21); The second sub-outer lining ring (261) is arranged around the second sub-inner lining ring (262), the second sub-mounting ring (263) is located between the second sub-outer lining ring (261) and the second sub-inner lining ring (262), and the second sub-mounting ring (263) is provided with another part of the first roller (21).

6. The crankshaft assembly of the engine according to claim 2, characterized in that: The second rolling bearing (30) includes: a second outer liner ring, a second inner liner ring, a second mounting ring and a plurality of second rollers (31); the second outer liner ring is sleeved on the second inner liner ring, and the second outer liner ring is spaced apart from the second inner liner ring to form a second mounting space (32) between the second inner liner ring and the second outer liner ring; the second mounting ring is sleeved on the second inner liner ring and is located in the second mounting space (32); a plurality of second rollers (31) are all located in the second mounting space (32), and a plurality of second rollers (31) can all be rotatably disposed on the second mounting ring; a plurality of second rollers (31) are arranged in sequence along the circumference of the second inner liner ring, and a plurality of second rollers (31) are all in contact with the second outer liner ring and the second inner liner ring.

7. The crankshaft assembly of the engine according to claim 6, characterized in that: The second inner liner ring is formed with a second oil inlet hole (33), the second oil inlet hole (33) is communicated with the second installation space (32), and the second oil inlet hole (33) is communicated with the oil flow channel (50) on the crankshaft (10).

8. The crankshaft assembly of the engine according to claim 6, characterized in that: The second outer lining ring comprises a third sub-outer lining ring (341) and a fourth sub-outer lining ring (351), and the third sub-outer lining ring (341) and the fourth sub-outer lining ring (351) are detachably connected to form the second outer lining ring in an annular shape; the second inner lining ring comprises a third sub-inner lining ring (342) and a fourth sub-inner lining ring (352), and the third sub-inner lining ring (342) and the fourth sub-inner lining ring (352) are detachably connected to form the second inner lining ring in an annular shape; the second mounting ring comprises a third sub-mounting ring (343) and a fourth sub-mounting ring (353), and the third sub-mounting ring (343) and the fourth sub-mounting ring (353) are detachably connected to form the second mounting ring in an annular shape; The third sub-outer liner ring (341) is arranged around the third sub-inner liner ring (342), the third sub-mounting ring (343) is located between the third sub-outer liner ring (341) and the third sub-inner liner ring (342), and the third sub-mounting ring (343) is provided with a portion of the second roller (31); The fourth sub-outer lining ring (351) is arranged around the fourth sub-inner lining ring (352), the fourth sub-mounting ring (353) is located between the fourth sub-outer lining ring (351) and the fourth sub-inner lining ring (352), and the fourth sub-mounting ring (353) is provided with another part of the second roller (31).

9. The crankshaft assembly of an engine according to any one of claims 1 to 8, characterized in that: The crankshaft (10) is formed with an oil flow channel (50), the oil flow channel (50) is used to be arranged corresponding to the oil supply port on the engine body (100), and the oil flow channel (50) is connected to the second rolling bearing (30).

10. The crankshaft assembly of the engine according to claim 9, characterized in that: The oil flow channel (50) comprises: an oil inlet flow channel (51), a connecting flow channel (52) and a branch flow channel (53); the crankshaft body section (11) corresponding to the sliding bearing (40) forms the oil inlet flow channel (51); the connecting rod journal section (12) forms the branch flow channel (53); the connecting flow channel (52) extends along the length direction of the crankshaft (10); and the connecting flow channel (52) connects the branch flow channel (53) and the oil inlet flow channel (51).

11. The crankshaft assembly of the engine according to claim 10, characterized in that: The connecting flow channel (52) comprises a plurality of sub-flow channel segments (521), wherein the sub-flow channel segments (521) are connected in sequence along the length direction of the crankshaft (10), and any two adjacent sub-flow channel segments (521) are connected in a bent manner, and the connection between two adjacent sub-flow channel segments (521) is connected to the corresponding branch flow channel (53).

12. An engine, characterized in that: A crankshaft assembly for an engine comprising the invention as claimed in any one of claims 1 to 11.

13. A vehicle, characterized in that: Comprising an engine according to claim 12.

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