Hybrid assembly and vehicle

Abstract

The application relates to the technical field of hybrid power, in particular to a hybrid assembly and a vehicle, which comprise an engine, the engine having an engine shaft; an electric machine, the electric machine having an electric machine shaft; and a shaft coupling, the engine shaft and the electric machine shaft being rigidly connected through the shaft coupling. In the hybrid assembly of the application, the engine shaft of the engine and the electric machine shaft of the electric machine are directly rigidly connected through the shaft coupling, so that the structural layout of the hybrid assembly is simpler and the cost is lower.

Description

Technical Field

[0001] This application relates to the field of hybrid technology, and more particularly to a hybrid powertrain and vehicle. Background Technology

[0002] In recent years, the new energy vehicle industry has continued to develop rapidly, with hybrid vehicles seeing a significant increase in market share. In existing technologies, traditional hybrid vehicles typically employ a complex power transmission system to transfer power between the engine and the electric drive system. Specifically, this complex power transmission system is located within the cavity between the engine and the electric drive system, allowing power to be transferred between them. However, this complex power transmission system not only results in a complex overall structural layout for the hybrid system but also leads to higher component costs. Utility Model Content

[0003] This application provides a hybrid powertrain with a simple structure and low cost.

[0004] To achieve the above objectives, according to a first aspect of this application, a hybrid powertrain is provided, comprising:

[0005] An engine having an engine shaft;

[0006] An electric motor, the electric motor having a motor shaft; and,

[0007] A coupling that rigidly connects the engine shaft and the motor shaft.

[0008] Optionally, at least one of the engine shaft and the motor shaft is detachably connected to the coupling.

[0009] Optionally, the engine shaft and the coupling are connected by a flange.

[0010] Optionally, the engine shaft is fixedly mounted or extends to form a first flange, and the coupling is fixedly mounted or extends to form a second flange, wherein the first flange and the second flange are detachably connected.

[0011] Optionally, the first flange is provided with a connecting boss, and the second flange is provided with a connecting hole, wherein the connecting boss can be detachably inserted into the connecting hole; or...

[0012] The first flange is provided with a connection hole, and the second flange is provided with a connection boss, which can be detachably inserted into the connection hole.

[0013] Optionally, the coupling and the motor shaft are connected by a detachable key.

[0014] Optionally, the coupling is provided with an external spline, and the motor shaft is provided with an internal spline, with the external spline and the internal spline being interference-fitted; or,

[0015] The coupling is provided with an internal spline, and the motor shaft is provided with an external spline. The external spline and the internal spline are connected by an interference fit.

[0016] Optionally, the external spline is an involute external spline, and the internal spline is an involute internal spline.

[0017] Optionally, the hybrid powertrain further includes a connecting housing, which is disposed between the engine and the motor, and both the engine and the motor are connected to the connecting housing.

[0018] Optionally, the connecting housing surrounds the coupling.

[0019] Optionally, the connecting housing is provided with a window to assist in the separation or disassembly of at least one of the motor shaft and the engine shaft from the coupling.

[0020] Optionally, the coupling is provided with pry points to assist in disassembling or assembling the connection between the coupling and the motor shaft, and the pry points correspond to the window.

[0021] Optionally, the hybrid assembly further includes a guide sleeve, one end of which is fixedly sleeved on the outside of the coupling, and the other end of which is fixedly sleeved on the outside of the motor shaft, and the guide sleeve, the motor shaft and the coupling are all coaxial.

[0022] Optionally, the guide sleeve has a first limiting part, and the motor includes a second limiting part, with the first limiting part abutting against the second limiting part.

[0023] Optionally, the motor further includes a motor body and a first seal. The motor body is provided with an extension hole. The motor shaft is disposed inside the motor body, and one end of the motor shaft is connected to the coupling through the extension hole. The inner ring of the first seal is sleeved on the motor shaft, and the outer ring of the first seal abuts against the periphery of the extension hole to prevent liquid inside the motor body from leaking out from the extension hole.

[0024] Optionally, the motor shaft includes a shaft body and a second seal. The shaft body has shaft holes extending through both ends, and the second seal is disposed in the shaft holes to prevent liquid inside the motor from leaking out from the shaft holes.

[0025] According to a second aspect of this application, a vehicle is also provided, including the aforementioned hybrid powertrain.

[0026] In the hybrid powertrain of this application embodiment, the engine shaft and the motor shaft are directly rigidly connected by a coupling, which makes the structural layout of the hybrid powertrain simpler and the cost lower.

[0027] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0030] Figure 1 This is a cross-sectional view of the hybrid powertrain provided in an exemplary embodiment of this disclosure.

[0031] Figure 2 yes Figure 1 The image shows a cross-sectional view of the engine shaft in the hybrid powertrain.

[0032] Figure 3 yes Figure 1 The diagram shows a cross-sectional view of the coupling in the hybrid powertrain.

[0033] Figure 4 yes Figure 1 The cross-sectional view of the guide sleeve in the hybrid powertrain is shown.

[0034] Figure 5 yes Figure 1 The diagram shows a cross-sectional view of the motor in the hybrid powertrain.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Engine; 11. Engine shaft; 111. First flange; 1111. Connecting boss

[0037] 2. Motor; 21. Motor shaft; 211. Internal spline; 212. Shaft body; 2121. Shaft hole; 213. Second seal; 22. Motor body; 221. Second limiting part; 222. Protrusion hole; 223. Guide groove; 23. First seal;

[0038] 3. Coupling; 31. Second flange; 311. Connecting hole; 32. External spline; 33. Pry point;

[0039] 4. Connecting shell; 41. Window;

[0040] 5. Guide sleeve; 51. First limiting part; 52. Guide body. Detailed Implementation

[0041] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0042] The first aspect of this application provides a hybrid powertrain, combined with Figure 1 It can be seen that the hybrid powertrain includes an engine 1, a motor 2 and a coupling 3; the engine 1 has an engine shaft 11, the motor 2 has a motor shaft 21, and the engine shaft 11 and the motor shaft 21 are rigidly connected by the coupling 3.

[0043] Since the engine shaft 11 and the motor shaft 21 are directly rigidly connected through the coupling 3, when the hybrid powertrain is working, the engine shaft 11 of the engine 1 and the motor shaft 21 of the motor 2 are directly transmitted by the coupling 3. This can optimize the axial space of the hybrid powertrain, make the structural layout of the hybrid powertrain simpler, and reduce the weight and component cost of the hybrid powertrain.

[0044] For example, when the motor shaft 21 of motor 2 rotates, it directly drives the engine shaft 11 of engine 1 to rotate via coupling 3, or vice versa. In this process, the main function of coupling 3 is to achieve power coupling and synchronization between engine 1 and motor 2, coordinate energy transfer, optimize system performance, and support energy recovery. This rigid connection design allows the hybrid powertrain to flexibly switch between pure electric mode, combined drive mode, and power generation and recovery mode, thereby achieving efficient and smooth power output.

[0045] In some embodiments, at least one of the engine shaft 11 and the motor shaft 21 is detachably connected to the coupling 3, so that the engine 1 and the motor 2 can be separated, which is more conducive to the maintenance and repair of the hybrid powertrain and can effectively extend the service life of the hybrid powertrain.

[0046] In some embodiments, the engine shaft 11 is a crankshaft, and the crankshaft of the engine 1 is rigidly connected to the motor shaft 21 of the motor 2 through the coupling 3, so that when the hybrid powertrain is working, the crankshaft of the engine 1 and the motor shaft 21 of the motor 2 can directly transmit power through the coupling 3.

[0047] In some embodiments, combined with Figure 2-3It is known that the engine shaft 11 and the coupling 3 are connected by a flange. Most existing engine shafts 11 have a flange structure. The engine shaft 11 and the coupling 3 are connected by a flange. While enabling the engine shaft 11 and the coupling 3 to be disassembled, the structural changes of engine 1 parts can be minimized, and the development cost of key components can be reduced.

[0048] In some embodiments, one end of the engine shaft 11 extends to form a first flange 111, and one end of the coupling 3 extends to form a second flange 31. The first flange 111 and the second flange 31 are detachably connected. Both the first flange 111, integrally formed at one end of the engine shaft 11, and the second flange 31, integrally formed at one end of the coupling 3, have higher strength and better fatigue performance. When the engine shaft 11 transmits power to the motor shaft 21 through the coupling 3, the stability and reliability of the connection node between the engine shaft 11 and the coupling 3 can be ensured. In other implementations, the first flange 111 can be fixed to the engine shaft 11 by welding or other fixing methods, and the second flange 31 can be fixed to the coupling 3 by welding or other fixing methods.

[0049] When installing the engine shaft 11 and coupling 3, align the first flange 111 and the second flange 31, and then secure them with bolts. When it is necessary to disassemble the engine shaft 11 and coupling 3, simply remove the bolts from the first flange 111 and the second flange 31.

[0050] Specifically, both the first flange 111 and the second flange 31 are disc-shaped structures with multiple bolts evenly arranged along the circumference of the first flange 111 and the second flange 31 to ensure the stability of the connection between the engine shaft 11 and the coupling 3, and at the same time ensure the coaxiality of the engine shaft 11 and the coupling 3.

[0051] In some embodiments, the first flange 111 is provided with a connecting boss 1111, which may be frustum, cylindrical, or other shapes. The second flange 31 is provided with a connecting hole 311, the shape of which is adapted to the shape of the connecting boss 1111, and the connecting boss 1111 is detachably inserted into the connecting hole 311. In other implementations, the connecting hole 311 may be located on the first flange 111, and the connecting boss 1111 may be located on the second flange 31.

[0052] When installing the engine shaft 11 and coupling 3, align the connecting boss 1111 of the first flange 111 with the connecting hole 311 of the second flange 31, then insert the connecting boss 1111 into the connecting hole 311, and finally tighten the first flange 111 and the second flange 31 with bolts. The cooperation between the connecting boss and the connecting hole 311 facilitates easier alignment and assembly of the first flange 111 and the second flange 31, improves the stability of the connection between the engine shaft 11 and coupling 3, and further enhances the coaxiality of the engine shaft 11 and coupling 3.

[0053] In some embodiments, combined with Figure 3 , Figure 5 It can be seen that the other end of coupling 3 is connected to one end of motor shaft 21 by a detachable key. The motor 2 and engine 1 can be separated by disassembling coupling 3 and motor shaft 21.

[0054] In this application, the hybrid powertrain can also implement active vibration reduction control of the motor under the action of an external electric drive controller to achieve vibration absorption function.

[0055] In some embodiments, the coupling 3 is provided with an external spline 32, and the motor shaft 21 is provided with an internal spline 211, with the external spline 32 and the internal spline 211 being interference-fitted. In other implementations, the internal spline 211 may be provided on the coupling 3, and the external spline 32 may be provided on the motor shaft 21.

[0056] When installing coupling 3 and motor shaft 21, after aligning the external spline 32 at the other end of coupling 3 with the internal spline 211 at one end of motor shaft 21, the other end of coupling 3 is inserted into one end of motor shaft 21 to complete the interference fit connection between external spline 32 and internal spline 211. The interference fit connection between coupling 3 and motor shaft 21 using internal spline 211 and external spline 32 ensures the accuracy of speed and torque transmission between engine 1 and electric drive system during power transmission.

[0057] For example, the power transmission between the engine shaft 11 of engine 1 and the motor shaft 21 of motor 2 can be as follows: when the engine shaft 11 rotates, the coupling 3 is driven to rotate synchronously through the cooperation of the first flange 111 and the second flange 31. When the coupling 3 rotates, the motor shaft 21 is driven to rotate synchronously through the cooperation of the external spline 32 and the internal spline 211. When the motor shaft 21 rotates, the coupling 3 is driven to rotate synchronously through the cooperation of the external spline 32 and the internal spline 211. When the coupling 3 rotates, the engine shaft 11 is driven to rotate synchronously through the cooperation of the first flange 111 and the second flange 31.

[0058] In some embodiments, the external spline 32 is an involute external spline, and the internal spline 211 is an involute internal spline. Between the coupling 3 and the motor shaft 21, automatic centering and alignment can be achieved through the tooth flanks of the involute external and internal splines, maximizing the concentricity of the coupling 3 and the motor shaft 21 and improving the stability of power transmission. Furthermore, the interference fit between the involute external and internal splines avoids the problem of decreased speed control accuracy caused by tooth surface wear under prolonged rotational impact between the engine 1 and the motor 2.

[0059] In some embodiments, please refer to Figure 1 The hybrid powertrain also includes a connecting housing 4, which is disposed between the engine 1 and the motor 2, and both the engine 1 and the motor 2 are connected to the connecting housing 4. Installing the connecting housing 4 between the engine 1 and the motor 2 to connect the engine 1 and the motor 2 ensures the stability of the position between the engine 1 and the motor 2, so that the engine shaft 11 of the engine 1 and the motor shaft 21 of the motor 2 can transmit power more stably through the coupling 3.

[0060] The connecting housing 4, used to reinforce the connection stability between engine 1 and motor 2, can be a separate component or an extension structure integrally formed with either motor 2 or engine 1, depending on design and usage requirements. Specifically, it can include the following three cases: 1) One end of the connecting housing 4 is welded to the side of motor 2 or directly integrally formed, while the other end is detachably fixed to the side of engine 1 using bolts or other structures; 2) One end of the connecting housing 4 can be detachably fixed to the side of motor 2 using bolts or other structures, while the other end is welded to the side of engine 1 or directly integrally formed; 3) Both ends of the connecting housing 4 are detachably fixed to the sides of motor 1 and motor 2 respectively using bolts or other structures.

[0061] In some embodiments, the connecting housing 4 surrounds the coupling 3 to protect the coupling 3 from interference or collision with external structures.

[0062] In some embodiments, the connecting housing 4 is provided with a window 41 for assisting in the separation or assembly / disassembly of at least one of the motor shaft 21 and the engine shaft 11 from the coupling 3.

[0063] Specifically, the connection points between the motor shaft 21 and the coupling 3, and between the engine shaft 11 and the coupling 3, correspond to the window 41. Tools such as wrenches can be inserted through the window 41 into the connection points between the motor shaft 21 and the coupling 3 to disassemble and assemble the bolts on the first flange 111 and the second flange 31, thereby completing the disassembly and assembly of the motor shaft 21 and the coupling 3. Alternatively, tools can be inserted through the window 41 into the coupling 3 or the connection point between the motor shaft 21 and the coupling 3, and the coupling 3 can be pushed to separate the coupling 3 and the motor shaft 21.

[0064] In some embodiments, please refer to Figure 3 The coupling 3 is equipped with a pry point 33 to assist in separating or assembling the connection between the coupling 3 and the motor shaft 21, and the pry point 33 corresponds to the window 41. Based on the setting of the pry point 33, by inserting a tool from the window 41 to the pry point 33, the separation of the involute external spline of the coupling 3 and the involute internal spline of the motor shaft 21 can be completed more easily through the pry point 33.

[0065] Specifically, the pry point 33 can be a hole or groove structure on the coupling 3.

[0066] In some embodiments, the hybrid powertrain further includes a guide sleeve 5, one end of which is fixedly sleeved on the outside of the coupling 3, and the other end of which is fixedly sleeved on the outside of the motor shaft 21. The guide sleeve 5, the motor shaft 21, and the coupling 3 are all coaxial, so as to improve the coaxiality of the coupling 3 and the motor shaft 21 through the connection of the guide sleeve 5 with the coupling 3 and the motor shaft 21.

[0067] In some embodiments, please refer to Figure 4-5 The guide sleeve 5 has a first limiting part 51, and the motor 2 includes a second limiting part 221. The first limiting part 51 abuts against the second limiting part 221. When the coupling 3 and the motor shaft 21 are installed, the guide sleeve 5 is first fitted onto the motor shaft 21; at this time, the second limiting part 221 limits the guide sleeve 5 to ensure its accurate installation position; then the coupling 3 is aligned with the guide sleeve 5 and inserted into the guide sleeve 5 and the motor shaft 21 in sequence to complete the installation of the coupling 3 and the motor shaft 21.

[0068] In some embodiments, the motor 2 further includes a motor body 22 and a first seal 23. The motor body 22 is provided with an extension hole 222. The motor shaft 21 is disposed inside the motor body 22, and one end of the motor shaft 21 is connected to the coupling 3 through the extension hole 222. The inner ring of the first seal 23 is sleeved on the motor shaft 21, and the outer ring of the first seal 23 abuts against the periphery of the extension hole 222 to prevent liquid inside the motor body 22 from leaking out from the extension hole 222.

[0069] Specifically, the liquid in the motor body 22 is cooling oil, and the first seal 23 prevents the cooling oil from leaking out from the gap between the protrusion hole 222 and the motor shaft 21. The first seal 23 is preferably an oil seal.

[0070] In some embodiments, the guide sleeve 5 further includes a guide body 52, a first limiting part 51 surrounds the outer periphery of the guide body 52 and is integrally formed with the guide body 52, the two ends of the guide body 52 are respectively sleeved on the coupling 3 and the motor shaft 21, and are fixedly connected to the coupling 3 and the motor shaft 21 by interference fit; the second limiting part 221 is an annular protrusion structure provided on the motor body 22, and the motor body 22 is provided with a guide groove 223, the guide groove 223 is connected to the protrusion hole 222, and the second limiting part 221 surrounds the outer periphery of the guide groove 223.

[0071] When the guide sleeve 5 is installed, the guide body 52 is sleeved on the motor shaft 21 and pushed along the motor shaft 21 until the guide body 52 extends into the guide groove 223, and the first limiting part 51 abuts against the second limiting part 221 to complete the installation of the guide sleeve 5.

[0072] In some embodiments, the motor shaft 21 includes a shaft body 212 and a second seal 213. The shaft body 212 has shaft holes 2121 extending through both ends. The second seal 213 is disposed within the shaft holes 2121 to prevent liquid inside the motor 2 from leaking out through the shaft holes 2121. The aforementioned involute internal spline is disposed within the shaft hole 2121. That is, when the coupling 3 is connected to the motor shaft 21, the other end of the coupling 3 extends into the shaft hole 2121 to achieve an interference fit between the involute external spline and the involute internal spline. The second seal 213 prevents cooling oil inside the motor body 22 from leaking out through the gap between the coupling 3 and the shaft hole 2121.

[0073] According to a second aspect of this application, a vehicle is also provided, including the aforementioned hybrid powertrain.

[0074] In the description of this application, 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 technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0075] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0076] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0077] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A hybrid powertrain, characterized in that, include: An engine having an engine shaft; An electric motor, the electric motor having a motor shaft; and, A coupling, through which the engine shaft and the motor shaft are rigidly connected; At least one of the engine shaft and the motor shaft is detachably connected to the coupling.

2. A hybrid powertrain according to claim 1, characterized in that, The engine shaft and the coupling are connected by a flange.

3. A hybrid powertrain according to claim 2, characterized in that, The engine shaft is fixedly mounted or extended to form a first flange, and the coupling is fixedly mounted or extended to form a second flange. The first flange and the second flange are detachably connected.

4. A hybrid powertrain according to claim 3, characterized in that, The first flange is provided with a connecting boss, and the second flange is provided with a connecting hole, wherein the connecting boss can be detachably inserted into the connecting hole; or... The first flange is provided with a connection hole, and the second flange is provided with a connection boss, which can be detachably inserted into the connection hole.

5. A hybrid powertrain according to claim 1, characterized in that, The coupling is detachably keyed to the motor shaft.

6. A hybrid powertrain according to claim 5, characterized in that, The coupling is provided with an external spline, and the motor shaft is provided with an internal spline; the external spline and the internal spline are connected by an interference fit; or... The coupling is provided with an internal spline, and the motor shaft is provided with an external spline. The external spline and the internal spline are connected by an interference fit.

7. A hybrid powertrain according to claim 6, characterized in that, The external spline is an involute external spline, and the internal spline is an involute internal spline.

8. A hybrid powertrain according to claim 1, characterized in that, The hybrid powertrain also includes a connecting housing, which is disposed between the engine and the motor, and both the engine and the motor are connected to the connecting housing.

9. A hybrid powertrain according to claim 8, characterized in that, The connecting housing surrounds the coupling.

10. A hybrid powertrain according to claim 9, characterized in that, The connecting housing is provided with a window to assist in the separation or assembly / disassembly of at least one of the motor shaft and the engine shaft from the coupling.

11. A hybrid powertrain according to claim 10, characterized in that, The coupling is provided with pry points to assist in separating or disassembling the connection between the coupling and the motor shaft, and the pry points correspond to the window.

12. A hybrid powertrain according to any one of claims 1-11, characterized in that, The hybrid assembly also includes a guide sleeve, one end of which is fixedly sleeved on the outside of the coupling, and the other end of which is fixedly sleeved on the outside of the motor shaft. The guide sleeve, the motor shaft, and the coupling are all coaxial.

13. A hybrid powertrain according to claim 12, characterized in that, The guide sleeve has a first limiting part, and the motor includes a second limiting part, with the first limiting part abutting against the second limiting part.

14. A hybrid powertrain according to any one of claims 1-11, characterized in that, The motor also includes a motor body and a first seal. The motor body is provided with an extension hole. The motor shaft is disposed inside the motor body, and one end of the motor shaft is connected to the coupling through the extension hole. The inner ring of the first seal is sleeved on the motor shaft, and the outer ring of the first seal abuts against the periphery of the extension hole to prevent liquid inside the motor body from leaking out from the extension hole.

15. A hybrid powertrain according to any one of claims 1-11, characterized in that, The motor shaft includes a shaft body and a second seal. The shaft body has shaft holes extending through both ends. The second seal is disposed in the shaft holes to prevent liquid inside the motor from leaking out of the shaft holes.

16. A vehicle, characterized in that, Includes the hybrid powertrain described in any one of claims 1-15.

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