Power coupling device, powertrain, and vehicle

Abstract

A power coupling device (1000), a powertrain (2000), and a vehicle (3000) are provided. The power coupling device includes a drive assembly (200), a coupling member (400), an elastic member (300), a first power assembly (110), and a second power assembly (120). Two ends of the elastic member (300) cooperate with the drive assembly (200) and the coupling member (400), respectively. The first power assembly (110) is normally drivingly connected to the coupling member (400). When the power coupling device is in a coupled state, the second power assembly (120) is drivingly connected to the coupling member (400). When the power coupling device is in a disengaged state, the second power assembly (120) is decoupled from the coupling member (400). The drive assembly drives the coupling member (400) by driving the resilient member (300), so that the power coupling is switched from a disengaged state to a coupled state.

Description

[Technical Field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority to Chinese Patent Application No. "202310013984.6" entitled "POWER COUPLING APPARATUS, POWERTRAIN, AND VEHICLE" filed on January 5, 2023 by BYD Company Limited.

[0002] This application relates to the field of mechanical transmission technology, and more particularly to power combinations, powertrains, and vehicles. [Background technology]

[0003] In existing synchronizers used in power couplings, if the relative positions of the gear sleeve and the engagement teeth of the shift fork are not aligned during engagement, the engagement teeth and the gear sleeve collide, preventing successful engagement. In this case, the shift fork must repeatedly disengage and re-engage until successful engagement is achieved. In other words, there are problems with engagement taking a long time and being susceptible to damage. Summary of the Invention

[0004] The present application is intended to solve at least one of the technical problems of the related art to some extent.

[0005] Accordingly, the present application provides a power coupling device, the power coupling device including: a drive assembly; an elastic member, where a first end of the elastic member cooperates with the drive assembly; a coupling member, where the coupling member cooperates with a second end of the elastic member; and a first power assembly and a second power assembly, where the first power assembly is normally drivingly connected to the coupling member, the power coupling device having a coupled state and a decoupled state, where when the power coupling device is in the coupled state, the second power assembly is drivingly connected to the coupling member, and when the power coupling device is in the decoupled state, the second power assembly is decoupled from the coupling member, in which case the drive assembly drives the coupling member by driving the elastic member, thereby switching the power coupling device from the decoupled state to the coupled state.

[0006] The power coupling device provided in the present application needs to be switched from a separated state to a coupled state, and the drive assembly first applies a driving force to the elastic member, so that the elastic member is compressed, and then the elastic member generates a pushing force to drive the coupling member to be coupled to the second power assembly. Even if the coupling member and the second power assembly cannot be successfully engaged due to a mismatch between their relative positions, the elastic member still waits for the coupling member and the second power assembly to rotate to a position where the coupling member and the second power assembly can be successfully engaged, and can use the pushing force of the elastic member to continuously drive the coupling member to be coupled to the second power assembly, so that the drive assembly does not need to repeatedly disengage and re-engage, and the power coupling between the first power assembly, the coupling member, and the second power assembly can be implemented by one drive, and the number of collisions between the coupling member and the second power assembly is reduced, which has the advantages of quick coupling and long service life.

[0007] The present application further provides a powertrain including the power combining device provided in the embodiments of the present application.

[0008] The present application further provides a vehicle including a powertrain provided in an embodiment of the present application.

[0009] Additional aspects and advantages of the present application will be set forth in part in the description that follows, and in part will be apparent from the description, or may be learned by practice of the present application. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a schematic diagram of a vehicle according to an embodiment of the present application; [Figure 2] 1 is a schematic cross-sectional view of a power coupling device in a disconnected state according to an embodiment of the present application; [Figure 3] 1 is a schematic cross-sectional view of a power coupling device in a coupled state according to an embodiment of the present application; [Figure 4] FIG. 2 is an exploded view of a power coupling device according to an embodiment of the present application. [Figure 5] 1 is a schematic diagram of a power coupling assembly according to an embodiment of the present application; [Figure 6] 1 is a schematic diagram of an arrangement member of a power coupling device according to an embodiment of the present application; [Figure 7] 1 is a schematic diagram of an arrangement member of a power coupling device according to an embodiment of the present application; DETAILED DESCRIPTION OF THE INVENTION

[0011]

[0023] The following describes embodiments of the present application in detail, and examples of embodiments are shown in the accompanying drawings, in which the same or similar reference numerals represent the same or similar elements, or elements having the same or similar functions, throughout. The following embodiments described with reference to the accompanying drawings are exemplary and are intended to illustrate the present application, but should not be understood as limiting the present application.

[0012] Hereinafter, a power combining device 1000, a power train 2000, and a vehicle 3000 according to an embodiment of the present application will be described in detail with reference to FIGS.

[0013] 1 , in some embodiments, a vehicle 3000 includes a powertrain 2000, a first wheel 3100, and a second wheel 3200. The powertrain 2000 includes a power coupling device 1000, a first motor 2100, and a second motor 2200. The power coupling device 1000 includes a first power assembly 110 and a second power assembly 120. The first motor 2100 is drivingly coupled to the first power assembly 110, and the first wheel 3100 is drivingly coupled to the first power assembly 110. The second motor 2200 is drivingly coupled to the second power assembly 120, and the second wheel 3200 is drivingly coupled to the second power assembly 120. In other words, the vehicle 3000 uses the powertrain 2000 in a wheel-side independent drive form. The power coupling device 1000 is configured to enable power coupling between the first power assembly 110 and the second power assembly 120, so that the powertrain 2000 changes from a wheel-side independent drive form to a centralized drive form, i.e., the first motor 2100 and the second motor 2200 jointly drive the first wheel 3100 and the second wheel 3200, so that the power coupling device can adapt to the power requirements in different scenarios and can be effectively used in escape scenarios under off-road operating conditions.

[0014] In some embodiments, the vehicle 3000 may include two powertrains 2000, one powertrain 2000 correspondingly driving the two front wheels and the other powertrain 2000 correspondingly driving the two rear wheels, i.e., the vehicle 3000 may be a four-wheel independent drive vehicle.

[0015] As shown in FIGS. 2 and 3 , the power coupling device 1000 further includes a drive assembly 200, a resilient member 300, and a coupling member 400. A first end of the resilient member 300 cooperates with the drive assembly 200, and a second end of the resilient member 300 cooperates with the coupling member 400. The coupling member 400 is normally drivingly coupled to the first power assembly 110; that is, the coupling member 400 and the first power assembly 110 are always coupled in a manner that allows power to be transmitted, such as a splined or geared connection. The power coupling device 1000 has an engaged state and a disengaged state. When the power coupling device 1000 is in the engaged state, the second power assembly 120 is drivingly coupled to the coupling member 400, as shown in FIG. 3 . When the power coupling device 1000 is in the disengaged state, the second power assembly 120 is disengaged from the coupling member 400, as shown in FIG. 2 . The drive assembly 200 drives the coupling member 400 by driving the resilient member 300, which causes the power coupling device 1000 to switch from a decoupled state to a coupled state. In some embodiments, the resilient member 300 is a coil spring structure.

[0016] The power coupling device 1000 provided in the present application needs to be switched from a separated state to a coupled state, and the drive assembly 200 first applies a driving force to the elastic member 300, resulting in the elastic member 300 being compressed, and then the elastic member 300 generates a pushing force to drive the coupling member 400 to be coupled to the second power assembly 120. Even if the coupling member 400 and the second power assembly 120 cannot be successfully engaged due to a mismatch between their relative positions, the elastic member can still wait for the coupling member 400 and the second power assembly 120 to rotate to a position where the coupling member and the second power assembly can be successfully engaged, and by using the pressing force of the elastic member 300, the coupling member 400 can be continuously driven to be coupled to the second power assembly 120, so that the drive assembly 200 does not need to repeatedly disengage and re-engage, and the power coupling between the first power assembly 110, the coupling member 400 and the second power assembly 120 can be implemented by one drive, and the number of collisions between the coupling member 400 and the second power assembly 120 is reduced, which has the advantages of quick coupling and long service life.

[0017] In some embodiments, the power coupling device 1000 further has an intermediate state. When the power coupling device 1000 is in the intermediate state, the second power assembly 120 is in contact with the coupling member 400 but is not drivingly connected thereto, and the elastic member 300 is in a compressed state. In other words, when the power coupling device 1000 is switched from the separated state to the coupled state, if the coupling member 400 and the second power assembly 120 collide due to a misalignment between their relative positions, i.e., when the power coupling device 1000 is in the intermediate state, the coupling member 400 and the second power assembly 120 are in contact but cannot drive power. In this case, the elastic member 300 continuously applies a pushing force to the coupling member 400 by compression while waiting for the coupling member 400 and the second power assembly 120 to rotate to a position where the coupling member and the second power assembly can be successfully engaged, pushing the coupling member 400 to a position where the coupling member is drivingly connected to the second power assembly 120.

[0018] 2 and 3 , in some embodiments, coupling member 400 includes a first sliding sleeve 410 and a first retaining portion 420, where first sliding sleeve 410 is movable relative to first power assembly 110 and second power assembly 120, and first retaining portion 420 is fastened to the outside of first sliding sleeve 410. Drive assembly 200 includes a second sliding sleeve 210, where second retaining portion 220 is disposed inside second sliding sleeve 210, and second sliding sleeve 210 is fitted onto first sliding sleeve 410 for relative movement, and first retaining portion 420 is disposed on the opposite side of second retaining portion 220. The elastic member 300 is fitted onto the first sliding sleeve 410, and the elastic member 300 fits between the first retaining portion 420 and the second retaining portion 220. The sleeving arrangement between the second sliding sleeve 210, the elastic member 300 and the first sliding sleeve 410, and the cooperating arrangement between the second retaining portion 220, the elastic member 300 and the first retaining portion 420 is simple, effective and reliable for implementing the sequential compression of the drive assembly 200, the elastic member 300 and the coupling member 400.

[0019] 2 and 3 , in some embodiments, a first alignment groove 430 is disposed on a side of the first retaining portion 420 facing the second retaining portion 220, and the second end of the elastic member 300 cooperates with the first alignment groove 430. In some embodiments, a second alignment groove 230 is defined between an outer sidewall of the first sliding sleeve 410, which is a side of the second retaining portion 220 facing the first retaining portion 420, and an inner sidewall of the second sliding sleeve 210, and the first end of the elastic member 300 cooperates with the second alignment groove 230. The first end or the second end of the elastic member 300 cooperates separately with a groove-like structure formed in the coupling member 400 or the drive assembly 200, thereby effectively avoiding problems such as release or shaking of the elastic member 300 and improving the structural reliability of the power coupling device 1000.

[0020] 2 to 4 , in some embodiments, the coupling member 400 includes a third retaining portion 440 adapted to cooperate with the drive assembly 200, the third retaining portion 440 being located on a side of the drive assembly 200 facing away from the elastic member 300. The drive assembly 200 drives the coupling member 400 by driving the third retaining portion 440, thereby switching the power coupling device 1000 from the coupled state to the disengaged state. Because the process of switching the power coupling device 1000 from the coupled state to the disengaged state can be performed directly, the drive assembly 200 can push the third retaining portion 440 to directly press the coupling member 400 in a direction opposite to the direction of compressing the elastic member 300, resulting in a simple and reliable structure.

[0021] In some embodiments, when the power coupling device 1000 is in the coupled state, the elastic member 300 is in a compressed state. When the elastic member 300 is in a compressed state, i.e., the coupling member 400 always tends to move toward the first power assembly 110, the third retaining portion 440 cooperates with the drive assembly 200 to act as a limiter, thereby fixing the position of the coupling member 400. This ensures the coupling stability of the power coupling device 1000 in the coupled state. In some embodiments, regardless of the state of the power coupling device 1000, the elastic member 300 is normally in a compressed state, i.e., the elastic member 300 is always compressed, thereby preventing the coupling member 400 from easily vibrating.

[0022] As shown in Figures 2 and 3, in some embodiments, the third retention portion 440 is fastened to the outside of the first sliding sleeve 410, and the third retention portion 440 is positioned on the side of the second retention portion 220 facing away from the elastic member 300.

[0023] 4 , in some embodiments, a third positioning groove 450 is disposed in the first sliding sleeve 410, and the third retaining portion 440 has a snap spring structure, and the third retaining portion 440 is sandwiched in the third positioning groove 450. The third retaining portion 440 is disposed to have a snap spring structure so as to facilitate assembly and disassembly between the third retaining portion 440 and the first sliding sleeve 410, and to further facilitate assembly and disassembly between the second sliding sleeve 210 and the first sliding sleeve 410.

[0024] In some embodiments, the movement stroke of the coupling member 400 is 10 mm to 14 mm. If the stroke of the coupling member 400 is too short (e.g., less than 10 mm), the swinging of the coupling member 400 and the elastic member 300 will easily cause incorrect coupling between the coupling member 400 and the second power assembly 120. If the stroke of the coupling member 400 is too long (e.g., more than 14 mm), the spatial compactness and coupling efficiency of the power coupling device 1000 will be affected.

[0025] 5 , in some embodiments, the power combination device 1000 further includes a positioning assembly 500, which includes a positioning member 510 and a position receiver 520. The positioning member 510 is disposed on the coupling member 400, and the position receiver 520 is fixedly disposed and configured to receive position information of the positioning member 510. In some embodiments, the position receiver 520 is fixedly coupled to a housing of the powertrain 2000. Because the position of the coupling member 400 can accurately reflect whether the power combination device 1000 is in a coupled or disengaged state, the positioning member 510 needs to be disposed on the coupling member 400 rather than on the drive assembly 200.

[0026] 4 to 7, in some embodiments, the positioning member 510 includes a magnetic body 511. In other words, the position receiver 520 acquires the position of the magnetic body 511 through changes in the magnetic field, and the positioning member 510 and the position receiver 520 do not need to be configured to transmit or receive signals. Therefore, the structure is simple and the cost is low.

[0027] 4, 6, and 7, in some embodiments, the positioning member 510 further includes a magnetic material bracket 512, which extends from the coupling member 400 to the position receiver 520, and the magnetic material 511 is disposed at an end of the magnetic material bracket 512 that is close to the position receiver 520. In an actual design of a structural arrangement, the distance between the coupling member 400 and the position receiver 520 is generally large, and when a change in position is detected through a change in a magnetic field, the distance between the magnetic material 511 and the position receiver 520 needs to be sufficiently short (for example, less than 8 mm) to ensure the detection accuracy requirements. Therefore, the magnetic material bracket 512 extending from the coupling member 400 to the position receiver 520 is disposed so that the distance between the magnetic material 511 and the position receiver 520 can be effectively shortened, thereby effectively ensuring the accuracy of the position estimation of the coupling member 400. In some embodiments, in the process of the drive assembly 200 driving the coupling member 400, the distance between the magnetic material 511 and the position receiver 520 varies between 3 mm and 7 mm.

[0028] 4, 6, and 7, in some embodiments, an anti-rotation limiting portion 513 is disposed on the magnetic material bracket 512. The anti-rotation limiting portion 513 is disposed to limit the rotation of the magnetic material bracket 512 to prevent the magnetic material bracket 512 from rotating due to the effect of gravity of the magnetic material bracket.

[0029] As shown in Figures 4, 6, and 7, in some embodiments, the drive assembly 200 further includes a first guide shaft 240, the second sliding sleeve 210 is movable along the axis of the first guide shaft 240, and the rotation stop limiting portion 513 is formed in a groove-shaped structure and cooperates with the first guide shaft 240 to limit the rotation of the magnetic bracket 512.

[0030] 4, in some embodiments, first engagement teeth 111 are disposed on first power assembly 110, second engagement teeth 121 are disposed on second power assembly 120, and third engagement teeth 460 are disposed on coupling member 400. First engagement teeth 111 are normally engaged with third engagement teeth 460. When power coupling device 1000 is in the engaged state, second engagement teeth 121 are engaged and connected with third engagement teeth 460. When power coupling device 1000 is in the disengaged state, second engagement teeth 121 are disengaged from third engagement teeth 460.

[0031] In some embodiments, the third engagement teeth 460 are fitted to the outer surfaces of the first engagement teeth 111, such that the first power assembly 110 is drivingly coupled to the coupling member 400 at a uniform rotational speed. When the power coupling device 1000 is in a coupled state, the third engagement teeth 460 are fitted to the outer surfaces of the second engagement teeth 121, such that the second power assembly 120 is drivingly coupled to the coupling member 400 at a uniform rotational speed. In other words, both the engagement connection between the third engagement teeth 460 and the first engagement teeth 111 and the engagement connection between the third engagement teeth 460 and the second engagement teeth 121 are spline connections, such that a connection capable of driving at a uniform rotational speed is implemented between the three engagement teeth.

[0032] In some other embodiments, the third engagement tooth 460 and the first engagement tooth 111 may alternatively have a mutually externally engaging gear connection with each other. The third engagement tooth 460 and the second engagement tooth 121 may alternatively have a mutually externally engaging gear connection with each other. In other words, the third engagement tooth 460 acts as an idler gear between the first engagement tooth 111 and the second engagement tooth 121, and when the number of teeth of the first engagement tooth 111 is equal to the number of teeth of the second engagement tooth 121, a drive at a constant rotational speed can be implemented between the first engagement tooth 111 and the second engagement tooth 121.

[0033] As shown in FIG. 4 , in some embodiments, the first power assembly 110 includes a first power shaft 112 and a first gear sleeve 113. The first gear sleeve 113 is fitted to the outer surface of the first power shaft 112. The first engagement teeth 111 are formed on the outer periphery of the first gear sleeve 113. The second power assembly 120 includes a second power shaft 122 and a second gear sleeve 123. The second gear sleeve 123 is fitted to the outer surface of the second power shaft 122, and the second engagement teeth 121 are formed on the outer periphery of the second gear sleeve 123. In some embodiments, the first power shaft 112 is separately coupled to the first motor 2100 and the first wheel 3100, and the second power shaft 122 is separately coupled to the second motor 2200 and the second wheel 3200. In some embodiments, the first gear sleeve 113 is drivingly connected to the first power shaft 112 by a splined arrangement, and the second gear sleeve 123 is drivingly connected to the second power shaft 122 by a splined arrangement.

[0034] 2-4 , in some embodiments, the first power assembly 110 further includes a first gear sleeve retaining portion 114 and a first snap spring 115, and the first gear sleeve retaining portion 114, the first gear sleeve 113, and the first snap spring 115 are arranged contiguously on the outer periphery of the first power shaft 112. The second power assembly 120 further includes a second gear sleeve retaining portion 124 and a second snap spring 125, and the second gear sleeve retaining portion 124, the second gear sleeve 123, and the second snap spring 125 are arranged contiguously on the outer periphery of the second power shaft 122. The first gear sleeve retaining portion 114 and the first snap spring 115 respectively restrict two sides of the first gear sleeve 113 to facilitate assembly and disassembly of the first gear sleeve 113. The second gear sleeve retaining portion 124 and the second snap spring 125 respectively restrict two sides of the second gear sleeve 123 to facilitate assembly and disassembly of the second gear sleeve 123. In some embodiments, at least one of the first gear sleeve retaining portion 114 and the second gear sleeve retaining portion 124 is a bearing.

[0035] 2 and 3, in some embodiments, the first gear sleeve 113 includes an inner ring 113a and an outer ring 113b. A side of the inner ring 113a adjacent to the first gear sleeve retaining portion 114 abuts and cooperates with the first gear sleeve retaining portion 114, and a side of the outer ring 113b adjacent to the first gear sleeve retaining portion 114 is spaced apart from the first gear sleeve retaining portion 114. The first engagement teeth 111 are formed on the outer periphery of the first gear sleeve 113, i.e., on the outer ring 113b. Therefore, when the inner ring 113a abuts and cooperates with the first gear sleeve retaining portion 114, the outer ring 113b is spaced apart from the first gear sleeve retaining portion 114 so that a restriction on one side of the first gear sleeve 113 can be implemented and a certain spatial margin can be ensured to avoid collision between the connecting member 400 and the first gear sleeve retaining portion 114.

[0036] 2 and 3 , in some embodiments, a side of the inner ring 113a remote from the first gear sleeve retaining portion 114 abuts and cooperates with the first snap spring 115, and a side of the outer ring 113b remote from the first gear sleeve retaining portion 114 protrudes relative to a side of the inner ring 113a remote from the first gear sleeve retaining portion 114. The outer ring 113b protrudes relative to the inner ring 113a, thereby increasing the length of the first engagement tooth 111 and thereby ensuring the stability of cooperation between the first engagement tooth 111 and the third engagement tooth 460 of the coupling member 400.

[0037] In some embodiments, the probability of successful cooperation between the second engagement teeth 121 and the third engagement teeth 460 may be represented by (ba)×z / d, where a is the tooth width of the second engagement teeth 121, b is the tooth gap of the third engagement teeth 460, z is the number of teeth of the second engagement teeth 121, and d is the reference diameter of each of the second engagement teeth 121 and the third engagement teeth 460. The value range of the probability of successful cooperation between the second engagement teeth 121 and the third engagement teeth 460, (ba)×z / d, is 0.5 to 0.8. In some embodiments, the number of teeth of the third engagement teeth 460 is greater than the number of teeth of the second engagement teeth 121, or the number of teeth of the third engagement teeth 460 is less than the number of teeth of the second engagement teeth 121. This contributes to increasing the probability of successful cooperation between the second engagement tooth 121 and the third engagement tooth 460.

[0038] 4 and 5 , in some embodiments, the drive assembly 200 further includes a drive member 250 and a shift fork 260, wherein the second sliding sleeve 210 is fixedly coupled to the shift fork 260, the shift fork 260 is disposed on the first guide shaft 240, and is movable along the axis of the first guide shaft 240, and the drive member 250 is configured to drive and move the shift fork 260. The drive member 250 may be a motor, and drives and moves the shift fork 260 through a drive mechanism including a lead screw and a lead screw nut to drive and move the second sliding sleeve 210, thereby pressing the elastic member 300 and the coupling member 400. In addition, the first guide shaft 240 is arranged to ensure the stability of the movement of the shift fork 260 and the second sliding sleeve 210.

[0039] 4, 6, and 7, in some embodiments, the positioning member 510 further includes a fastening member 514 and a second guide shaft 515, where the fastening member 514 and the magnetic bracket 512 are both disposed on the second guide shaft 515, the fastening member 514 fastening the first retaining portion 420, and the second guide shaft 515 is adapted to move along the axis of the second guide shaft. In some embodiments, the second guide shaft 515 movably passes through the shift fork 260, thereby improving the structural compactness of the power coupling device 1000.

[0040] The other components and operations of the power combination device 1000, the powertrain 2000, and the vehicle 3000 provided in the embodiments of the present application are all known to those skilled in the art, and will not be described in detail again herein.

[0041] In the description of the present application, orientations or positional relationships indicated by terms such as “center,” “longitudinal,” “transverse,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial,” “radial,” “circumferential,” and the like, are orientations or positional relationships illustrated with reference to the accompanying drawings, and are intended merely to facilitate and simplify the description of the present application, rather than to indicate or imply that the referenced devices or elements must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be understood as limiting the present application.

[0042] Additionally, the terms "first" and "second" are used solely for descriptive purposes and should not be understood as indicating or implying relative importance or quantity of the technical features being presented. Thus, a feature defined by "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality of" means two or more, unless expressly defined otherwise.

[0043] In this application, unless otherwise expressly stated and defined, terms such as "mount," "interconnect," "connect," and "fix" should be understood broadly, and may, for example, be understood as a fixed connection, a detachable connection, or an integral connection, as a mechanical connection or an electrical connection, as a direct connection or an indirect connection through an intermediate medium, or as an internal communication between two elements or an interactive relationship between two elements. Those skilled in the art can understand the specific meaning of the above terms in the present disclosure based on the specific circumstances.

[0044] Unless otherwise expressly stated and defined in this application, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact with each other, or that the first and second features are in indirect contact with each other via an intermediate medium. In addition, a first feature being "above," "over," or "on top of" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply that the horizontal height of the first feature is higher than that of the second feature. A first feature being "below," "under," or "beneath" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply that the horizontal height of the first feature is lower than that of the second feature.

[0045] In the description herein, reference to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described with reference to an embodiment or example is included in at least one embodiment or example of the present application. In this specification, illustrative references to the above terms do not necessarily refer to the same embodiment or example. Furthermore, specific features, structures, materials, or characteristics described may be suitably combined in any one or more embodiments or examples. In addition, where no inconsistency exists, those skilled in the art may incorporate and combine different embodiments or examples, and features of different embodiments or examples, described herein.

[0046] Although embodiments of the present application have been shown and described above, it may be understood that the above-described embodiments are illustrative and should not be understood as limiting the present application, and changes, modifications, substitutions and variations may be made to the above-described embodiments by those skilled in the art within the scope of the present application.

Claims

1. A power coupling device, a drive assembly; a resilient member, a first end of the resilient member cooperating with the drive assembly; a coupling member, said coupling member cooperating with the second end of said elastic member; a first power assembly and a second power assembly, the first power assembly normally drivingly connected to the coupling member, the power coupling having an engaged state and a disengaged state, the second power assembly being drivingly connected to the coupling member when the power coupling is in the engaged state, and the second power assembly being disengaged from the coupling member when the power coupling is in the disengaged state; The power coupling device, wherein the drive assembly drives the coupling member by driving the elastic member, such that the power coupling device is switched from the decoupled state to the coupled state.

2. 2. The power coupling of claim 1, further comprising an intermediate state, wherein when said power coupling is in said intermediate state, said second power assembly is in contact with but not drivingly connected to said coupling member and said resilient member is in a compressed state.

3. the coupling member comprises a first sliding sleeve and a first retaining portion, the first retaining portion being fastened to the outside of the first sliding sleeve, and the first sliding sleeve being movable relative to the first power assembly and the second power assembly; the drive assembly includes a second sliding sleeve and a second retaining portion, the first retaining portion is disposed on an opposite side of the second retaining portion, the second retaining portion is disposed inside the second sliding sleeve, and the second sliding sleeve is fitted onto the first sliding sleeve so as to be relatively movable; 3. The power coupling device according to claim 1, wherein the elastic member is fitted onto the first sliding sleeve, and the elastic member fits between the first retaining portion and the second retaining portion.

4. 4. The power coupling device of claim 3, wherein a first positioning groove is disposed on a side of the first retaining portion facing the second retaining portion, and the second end of the elastic member cooperates with the first positioning groove, and / or a second positioning groove is defined between an outer side wall of the first sliding sleeve, which is a side of the second retaining portion facing the first retaining portion, and an inner side wall of the second sliding sleeve, and the first end of the elastic member cooperates with the second positioning groove.

5. the coupling member includes a third retention portion, the third retention portion adapted to cooperate with the drive assembly, the third retention portion being located on a side of the drive assembly facing opposite the elastic member; The power coupling of claim 1 , wherein the drive assembly drives the coupling member by driving the third retaining portion, such that the power coupling is switched from the coupled state to the decoupled state.

6. 6. The power coupling of claim 5, wherein said resilient member is in a compressed state when said power coupling is in said coupled state.

7. the coupling member further comprises a first sliding sleeve, the first sliding sleeve being movable relative to the first power assembly and the second power assembly, and the third retaining portion being fastened to the outside of the first sliding sleeve; the drive assembly includes a second sliding sleeve, a second retaining portion is disposed inside the second sliding sleeve, and the second sliding sleeve is fitted onto the first sliding sleeve so as to be relatively movable; 7. The power coupling device according to claim 5, wherein the third retaining portion is located on a side of the second retaining portion facing away from the elastic member.

8. 8. The power coupling device according to claim 7, wherein a third positioning groove is disposed in the first sliding sleeve, the third retaining portion has a snap spring structure, and the third retaining portion is sandwiched in the third positioning groove.

9. 9. The power coupling device according to claim 1, wherein the stroke of movement of the coupling member is between 10 mm and 14 mm.

10. 9. The power coupling device of claim 1, further comprising a positioning assembly, the positioning assembly comprising a positioning member and a position receiver, the positioning member being disposed on the coupling member, and the position receiver being fixedly disposed and configured to receive position information of the positioning member.

11. The power coupling device of claim 10 , wherein the locating member comprises a magnetic material.

12. 12. The power coupling device of claim 11, wherein the locating member further comprises a magnetic bracket, the magnetic bracket extending from the coupling member to the position receiver, the magnetic material disposed on an end of the magnetic bracket proximate the position receiver.

13. 13. The power coupling device of claim 12, wherein a rotation stop limiting portion is disposed on the magnetic bracket.

14. the drive assembly comprises a first guide shaft and the second sliding sleeve, the second sliding sleeve being movable along the axis of the first guide shaft, the second sliding sleeve cooperating with the first end of the elastic member; 14. The power coupling of claim 13, wherein the anti-rotation limiting portion is formed in a groove-shaped configuration and cooperates with the first guide shaft.

15. the connecting member includes the first retention portion, the first retention portion being disposed in cooperation with the second end of the elastic member; 13. The power coupling device of claim 12, wherein the positioning member further comprises a clamping member and a second guide shaft, the clamping member and the magnetic bracket both being disposed on the second guide shaft, the clamping member clamping the first retaining portion, and the second guide shaft being adapted to move along an axis of the second guide shaft.

16. 16. A power coupling device according to any one of claims 11 to 15, wherein in the step of driving the coupling member with the drive assembly, the distance between the magnetic body and the position receiver varies between 3 mm and 7 mm.

17. a first engagement tooth disposed on the first power assembly, a second engagement tooth disposed on the second power assembly, and a third engagement tooth disposed on the coupling member; the first engagement tooth is normally engaged with the third engagement tooth; 17. The power coupling device of claim 1, wherein the second engagement tooth is engaged with the third engagement tooth when the power coupling device is in the coupled state, and the second engagement tooth is not engaged with the third engagement tooth when the power coupling device is in the disengaged state.

18. the third engagement teeth are fitted to the outer surface of the first engagement teeth, such that the first power assembly is drivingly connected to the coupling member at a uniform rotational speed; 18. The power coupling of claim 17, wherein when the power coupling is in the coupled state, the third engagement teeth are fitted onto outer surfaces of the second engagement teeth, such that the second power assembly is drivingly connected to the coupling member at a uniform rotational speed.

19. 19. The power coupling device of claim 18, wherein the first power assembly comprises a first power shaft and a first gear sleeve, the first gear sleeve fitted to an outer surface of the first power shaft, and the first engagement teeth formed on an outer periphery of the first gear sleeve; and the second power assembly comprises a second power shaft and a second gear sleeve, the second gear sleeve fitted to an outer surface of the second power shaft, and the second engagement teeth formed on an outer periphery of the second gear sleeve.

20. 20. The power coupling device of claim 19, wherein the first power assembly further comprises a first gear sleeve retaining portion and a first snap spring, the first gear sleeve retaining portion, the first gear sleeve, and the first snap spring being arranged contiguously on the outer periphery of the first power shaft, and the second power assembly further comprises a second gear sleeve retaining portion and a second snap spring, the second gear sleeve retaining portion, the second gear sleeve, and the second snap spring being arranged contiguously on the outer periphery of the second power shaft.

21. 21. The power coupling of claim 20, wherein at least one of the first gear sleeve retaining portion and the second gear sleeve retaining portion is a bearing.

22. the first gear sleeve comprises an inner ring and an outer ring; a side surface of the inner ring adjacent to the first gear sleeve retaining portion abutting and cooperating with the first gear sleeve retaining portion, and a side surface of the outer ring adjacent to the first gear sleeve retaining portion is spaced apart from the first gear sleeve retaining portion; and / or 22. A power coupling device according to claim 20 or 21, wherein a side of the inner ring remote from the first gear sleeve retaining portion abuts and cooperates with the first snap spring, and a side of the outer ring remote from the first gear sleeve retaining portion protrudes relative to the side of the inner ring remote from the first gear sleeve retaining portion.

23. 23. A power coupling device according to any one of claims 18 to 22, wherein the number of teeth of the third engagement teeth is greater than the number of teeth of the second engagement teeth, or the number of teeth of the third engagement teeth is less than the number of teeth of the second engagement teeth.

24. 23. The power combining device according to any one of claims 18 to 22, wherein a tooth width of the second engagement teeth is a, a tooth spacing of the third engagement teeth is b, the number of teeth of the second engagement teeth is z, reference diameters of the second engagement teeth and the third engagement teeth are d, and a value range of (b-a) x z / d is 0.5 to 0.

8.

25. 25. The power coupling device of claim 1, wherein the drive assembly comprises a drive member, the second sliding sleeve, a shift fork, and the first guide shaft, the second sliding sleeve cooperating with the first end of the resilient member, the second sliding sleeve fixedly coupled to the shift fork, the shift fork disposed on the first guide shaft and movable along the axis of the first guide shaft, and the drive member configured to drive the shift fork to move.

26. 26. A powertrain comprising: a power coupling device according to any one of claims 1 to 25; a first motor; and a second motor, wherein the first motor is drivingly connected to the first power assembly and the second motor is drivingly connected to the second power assembly.

27. 27. A vehicle comprising the powertrain of claim 26, a first wheel, and a second wheel, the first wheel being drivingly connected to the first power assembly and the second wheel being drivingly connected to the second power assembly.

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