Power coupling device, power assembly and vehicle

Abstract

The utility model discloses a power coupling device, a power assembly and a vehicle. The power coupling device comprises a first transmission part, and the first transmission part is connected with one of a driving device and a driving shaft; the first end of the connecting piece is connected with the first transmission piece; the second transmission part can be connected with the second end of the connecting part, and the second transmission part is connected with the other one of the driving device and the driving shaft; when the connecting piece is located at the first position, the first transmission piece is connected with the second transmission piece through the connecting piece; and when the connecting piece is located at the second position, the connecting piece is disconnected from the second transmission piece. According to the power coupling device, the power assembly and the vehicle, counter electromotive force generated by the motor when the vehicle is dragged can be effectively avoided.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a power coupling device, a power assembly and a vehicle. Background Art

[0002] In the prior art, when a vehicle is in a towing state, the back electromotive force is usually controlled by controlling the on and off of the three-phase bridge arm switch to control the magnetic field generated by the stator and the magnetic field generated by the back electromotive force to offset each other, which has a technical problem of low reliability. Utility Model Content

[0003] A series of simplified concepts are introduced in the utility model content section, which will be further described in detail in the detailed implementation section. The utility model content section of the utility model does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0004] In order to at least partially solve the above problems, according to a first aspect of the utility model, a power coupling device is provided, characterized in that it comprises:

[0005] a first transmission member connected to one of the driving device and the driving shaft;

[0006] A connecting member, a first end of which is connected to the first transmission member;

[0007] a second transmission member, the second transmission member being connectable to the second end of the connecting member, the second transmission member being connected to the other of the driving device and the driving shaft;

[0008] When the connecting member is in the first position, the first transmission member is connected to the second transmission member through the connecting member;

[0009] When the connecting member is in the second position, the connecting member is disconnected from the second transmission member.

[0010] Exemplarily, a drive assembly is connected to the connecting member, and the drive assembly is used to drive the connecting member to switch between the first position and the second position.

[0011] Exemplarily, the drive assembly comprises:

[0012] An air pump, when the air pump supplies air to the power coupling device, the connecting member is in the first position, and when the air pump draws air from the power coupling device, the connecting member is in the second position.

[0013] Exemplarily, the first transmission member is disposed around the outside of the second transmission member; or,

[0014] The second transmission member is disposed around the outside of the first transmission member.

[0015] Exemplarily, a receiving groove is provided on a side of the first transmission member facing the second transmission member;

[0016] The connecting member comprises a sliding block, and the sliding block can move in the receiving groove;

[0017] A groove is provided on a side of the second transmission member facing the first transmission member;

[0018] When the sliding block is in the first position, the sliding block is at least partially located in the groove;

[0019] When the sliding block is at the second position, none of the sliding blocks are located in the groove.

[0020] Exemplarily, the first transmission member further comprises a chamber; the connecting member further comprises a sealing member connected to the sliding block;

[0021] The seal is movable within the chamber, and the seal is used to seal the chamber.

[0022] Exemplarily, the length of the chamber along the first direction: the length of the groove along the first direction=1.2-1.5:1.

[0023] Exemplarily, the power coupling device further includes:

[0024] A first position sensor, wherein the first position sensor is disposed in the receiving slot and / or the groove, and data information fed back by the first position sensor is used to characterize the matching relationship between the sliding block and the groove.

[0025] Exemplarily, the power coupling device further includes:

[0026] The second position sensor is disposed on the first transmission member and / or the second transmission member, and is used to detect the relative position of the first transmission member and the second transmission member.

[0027] Exemplarily, there are at least two of the receiving slots, the grooves and the sliding blocks.

[0028] According to a second aspect of the utility model, a power assembly is provided, which includes the power coupling device as described above.

[0029] According to a third aspect of the utility model, a vehicle is provided, which includes the power assembly as described above.

[0030] According to the power coupling device, power assembly and vehicle of the utility model, when the vehicle is in a normal driving state, the connecting member can be controlled to be in the first position, and the drive device and the drive shaft can be connected through the first transmission member, the connecting member and the second transmission member to transmit power; when the vehicle is in a trailer state, the connecting member can be controlled to be in the second position to disconnect the drive device and the drive shaft, so that the drive device will not generate back electromotive force in this state, which can effectively ensure the safety of the drive device and its stability and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The following drawings of the present application are hereby used as part of the present application for understanding the present application. The drawings show the embodiments of the present application and their descriptions, and are used to explain the device and principle of the present application. In the drawings,

[0032] Figure 1 is a schematic structural block diagram of a power coupling device according to an embodiment of the present application;

[0033] Figure 2 for Figure 1 A schematic structural diagram of the first transmission member and the second transmission member in FIG.

[0034] Figure 3 is a cross-sectional view of a first transmission member, a second transmission member and a connecting member, wherein the connecting member is in a first position;

[0035] Figure 4 It is a cross-sectional view of the first transmission member, the second transmission member and the connecting member, wherein the connecting member is in the second position.

[0036] Description of reference numerals:

[0037] 100-motor controller protection device, 110-first transmission member, 111-accommodating groove, 112 chamber, 120-second transmission member, 121-groove, 130-connecting member, 131-sliding block, 132-connecting rod, 133-sealing member, 140-driving assembly, 141-air pump, 142-connecting pipe, 143-actuating member;

[0038] 200-driving device;

[0039] 300-Drive shaft. DETAILED DESCRIPTION

[0040] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present application. However, it is apparent to those skilled in the art that the present application can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present application, some technical features well known in the art are not described.

[0041] It should be understood that the present application can be implemented in different forms and should not be construed as being limited to the embodiments presented herein. On the contrary, providing these embodiments will make the disclosure thorough and complete and fully convey the scope of the present application to those skilled in the art. In the accompanying drawings, the sizes and relative sizes of layers and regions may be exaggerated for clarity. The same reference numerals throughout represent the same elements.

[0042] It should be understood that although the terms first, second, third, etc. can be used to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Therefore, without departing from the teachings of the present application, the first element, component, region, layer or part discussed below can be represented as a second element, component, region, layer or part.

[0043] Spatially relative terms such as "under", "beneath", "below", "under", "above", "above", etc., may be used herein for convenience of description to describe the relationship of one element or feature to other elements or features shown in the figures. It should be understood that the spatially relative terms are intended to encompass different orientations of the device in use and operation in addition to the orientation shown in the figures.

[0044] The purpose of the terms used herein is only to describe specific embodiments and is not intended to be limiting of the present application. When used herein, the singular forms "one", "an" and "said / the" are also intended to include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "consisting of" and / or "comprising", when used in this specification, determine the presence of the features, integers, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or groups. When used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0045] Embodiments of the utility model are described herein with reference to cross-sectional views as schematic diagrams of ideal embodiments (and intermediate structures) of the present application. In this way, variations in the shapes shown due to, for example, manufacturing techniques and / or tolerances can be expected. Therefore, the embodiments of the present application should not be limited to the specific shapes shown herein, but include shape deviations due to, for example, manufacturing. Therefore, what is shown in the figures is schematic in nature, and their shapes are not intended to display the actual shape of the device and are not intended to limit the scope of the present application.

[0046] See attached Figure 1-4The power coupling device 100 according to an embodiment of the present application is exemplarily described. The power coupling device 100 is applied to a vehicle, which is an electric drive vehicle.

[0047] See attached Figure 1 In this embodiment, the power coupling device 100 includes a first transmission member 110, a second transmission member 120 and a connecting member 130. The first transmission member 110 is connected to the driving device 200 of the vehicle, and the driving device 200 includes a motor (such as a permanent magnet synchronous motor, etc.), that is, the first transmission member 110 is connected to the output shaft of the motor. It should be noted that the connection mentioned in this application can be a transmission connection, and this transmission connection can be a direct transmission connection or an indirect transmission connection. The second transmission member 120 is connected to the driving shaft 300 of the vehicle, and the driving shaft 300 of the vehicle is connected to the wheels of the vehicle for driving the wheels to rotate. The first end of the connecting member 130 is connected to the first transmission member 110, and the second transmission member 120 can be connected to the second end of the connecting member 130, and the transmission member 120 can also be separated from the second end of the connecting member 130. The connecting member 130 is configured to be switchable between a first position and a second position. When the connecting member 130 is in the first position, the first transmission member 110 is connected to the second transmission member 120 through the connecting member 130, that is, the first transmission member 110, the connecting member 130 and the second transmission member 120 form a transmission connection, that is, the torque output by the driving device 200 can be transmitted to the driving shaft 300 through the first transmission member 110, the connecting member 130 and the second transmission member 120 to drive the wheel to rotate. When the connecting member 130 is in the second position, the connecting member 130 is disconnected from the second transmission member 120 and no longer forms a transmission connection. At this time, if the wheel rotates, the torque generated by it can only be transmitted to the second transmission member 120, and cannot be transmitted to the driving device 200 through the connecting member 130 and the first transmission member 110, and will not drive the rotor of the motor in the driving device 200 to rotate.

[0048] Thus, when the vehicle is in a normal driving state, the connecting member 130 can be controlled to be in the first position, and the drive device 200 and the drive shaft 300 can form a transmission connection through the first transmission member 110, the connecting member 130 and the second transmission member 120; when the vehicle is in a towing state, the connecting member 130 can be controlled to be in the second position, cutting off the transmission connection between the drive shaft 300 and the drive device 200. At this time, the rotation of the wheel will not drive the rotor of the motor in the drive device 200 to rotate, so that the motor in the drive device 200 will not generate back electromotive force in this state, avoiding damage to the drive device 200 due to the back electromotive force generated by the motor, and can effectively ensure safety, stability and reliability. When a vehicle with the power coupling device 100 of the present application is towing, it will not generate back electromotive force, does not need to dismantle the hardware, and there is no risk of internal short circuit of the motor. Compared with the solution of the prior art, it has significant advantages.

[0049] See attached Figure 2-4 In this embodiment, the second transmission member 120 is arranged around the outside of the first transmission member 110. The surface of the first transmission member 110 facing the second transmission member 120 (that is, the outer surface of the first transmission member 110) and the surface of the second transmission member 120 facing the first transmission member 110 (the inner surface of the second transmission member 120) are both circumferential surfaces, so that the first transmission member 110 and the second transmission member 120 can rotate around the same rotation axis. The first transmission member 110 and the second transmission member 120 are rotatably fixed on the vehicle, the first transmission member 110 is directly or indirectly connected to the driving device 200, and the second transmission member 120 is provided with gear teeth on the side away from the first transmission member 110, and the second transmission member 120 can be directly or indirectly connected to the driving shaft 300 through the gear teeth. Exemplarily, the first transmission member 100 can be fixedly or detachably connected to the output shaft of the motor in the driving device 200. Exemplarily, the second transmission member 120 can be connected to the driving shaft 300 through a transmission component such as a reduction box. Such a structural design is easy to implement.

[0050] The first transmission member 110 is provided with a receiving groove 111 on one side facing the second transmission member 120, and the second transmission member 120 is provided with a groove 121 on one side facing the first transmission member 110, and the groove 121 corresponds to the position of the receiving groove 111. The connecting member 130 includes a sliding block 131, which is slidably connected to the first transmission member 110, and the sliding block 131 can slide in the receiving groove 111. When the sliding block 131 is in the first position, the sliding block 131 is at least partially located in the groove 121, and at this time, the first transmission member 110 and the second transmission member 120 can achieve synchronous rotation through the sliding block 131, that is, when the driving device 200 drives the first transmission member 110 to rotate, the first transmission member 110 can drive the second transmission member 120 to rotate synchronously through the sliding block 131, and then drive the driving shaft 300 to rotate. When the connecting member 130 is in the second position, the sliding block 131 is not located in the groove 121, that is, the sliding block 131 can be completely located in the receiving groove 111. At this time, the first transmission member 110 and the second transmission member 120 are separated, and the rotation of the wheel will only drive the second transmission member 120 to rotate, and the second transmission member 120 will not drive the first transmission member 110 to rotate, that is, it will not drive the rotor of the motor of the driving device 200 to rotate, and the driving device 200 will not generate a back electromotive force due to the rotation of the wheel. In some other embodiments, the first transmission member can be configured to be arranged around the outside of the second transmission member, and the groove 121 is provided on the side of the first transmission member facing the second transmission member, and the receiving groove 111 is provided on the side of the second transmission member facing the first transmission member.

[0051] In this embodiment, there are at least two receiving grooves 111, grooves 121 and sliding blocks 131, each of which is evenly arranged along the circumference of the outer side of the first transmission member 110, each of which is evenly arranged along the circumference of the inner side of the second transmission member 120 and corresponds to the position of each receiving groove 111, and each connecting member 130 is respectively arranged in each receiving groove 111. In other embodiments, only one receiving groove 111, groove 121 and sliding block 131 may be provided.

[0052] In this embodiment, the first transmission member 110 further includes a chamber 112, the chamber 112 is connected to the receiving groove 111, the receiving groove 111 is located between the chamber 112 and the groove 121, and the chamber 112 can be cylindrical. The connecting member 130 also includes a sealing member 133 connected to the sliding block 131. In this embodiment, the sealing member 133 is connected to the sliding block 131 through a connecting rod 132. In some other embodiments, the sealing member 133 and the sliding block 131 can be directly connected. The sealing member 133 can move in the chamber 112. When the sealing member 133 moves in the chamber 112, it can drive the sliding block 131 to move synchronously in the receiving groove. The sealing member 133 is used to seal the chamber 112, that is, the edge of the sealing member 133 is sealed and connected to the inner wall of the chamber 112, so that by controlling the gas pressure in the chamber 112, the sealing member 133 can be controlled to move in the chamber 112, and then the sliding block 131 can be controlled to switch between the first position and the second position. When the pressure in the chamber 112 is positive and greater than a certain pressure threshold, the gas pressure can push the seal 133 to move toward the groove 121, that is, push the connecting member 130 to move toward the groove 121 as a whole, from the second position to the first position and remain in the first position, at this time, the sliding block 131 is at least partially located in the groove 121; when the pressure in the air chamber is negative and less than a certain pressure threshold, the gas pressure can drive the seal 133 to move away from the groove 121, that is, drive the connecting member 130 to move away from the groove 121 as a whole, from the first position to the second position and remain in the second position, at this time, the sliding block 131 is not located in the groove 121. The sliding block 131 (and the connecting rod 132) can be made of metal to ensure sufficient strength, and the seal 133 can be made of rubber to ensure sealing.

[0053] In this embodiment, the chamber 112, the accommodating groove 111 and the groove 121 all extend along the first direction, and the connecting member 130 moves along the first direction to switch between the first position and the second position. The length of the chamber 112 along the first direction: the length of the groove 121 along the first direction = 1.2 to 1.5: 1. Setting the length ratio in this range can ensure that the sealing member 133 will not fall out of the chamber 112 when the connecting member switches between the first position and the second position. The specific length of the chamber 112 along the first direction and the specific length of the groove 121 along the first direction can be determined according to the specific dimensions of the first transmission member 110 and the second transmission member 120, and this application does not limit this.

[0054] In this embodiment, the power coupling device 100 further includes a driving assembly 140, which is connected to the connecting member 130, and the driving assembly 140 is used to drive the connecting member 130 to switch between the first position and the second position.

[0055] The driving assembly 140 includes an air pump 141. When the air pump 141 supplies air to the power coupling device 100, the connecting member is in the first position. When the air pump 141 extracts air from the power coupling device 100, the connecting member is in the second position. Specifically, the air pump 141 is indirectly connected to the connecting member 130 through the connecting pipe 142 and the first transmission member 110. The air pump 141 can be connected to the chamber 112 on the connecting member 130 through the connecting pipe 142, supplying or extracting air to the chamber 112 to control the movement of the sealing member 133 in the chamber 112, and then controlling the sliding block 131 to switch between the first position and the second position. The first end of the connecting pipe 142 is connected to the air pump 141, and the second end of the connecting pipe 142 can be connected to the chamber 112. The drive assembly 140 further includes an actuator 143, which is connected to the connecting tube 142 and is used to drive the connecting tube 142 to move so as to connect or separate the connecting tube 142 from the chamber 112. In some embodiments, the drive assembly 140 may not include the actuator 143, and the second end of the connecting tube 142 is always connected to the chamber 112.

[0056] When the vehicle breaks down and needs to enter the towing state, the actuator 143 can be controlled to drive the connecting tube 142 to move so that the second end of the connecting tube 142 is connected to the chamber 112; then the air pump 141 is controlled to evacuate air so that the chamber 112 is in a negative pressure state, thereby moving the connecting member 130 from the first position to the second position; then the actuator 143 is controlled to drive the connecting tube 142 to move so that the second end of the connecting tube 142 is separated from the chamber 112, the chamber 112 is kept in a negative pressure state, and the connecting member 130 is kept in the second position. After the second end of the connecting tube 142 is separated from the chamber 112, the existence of the connecting tube 142 will not affect the rotation of the second connecting member 130. At this time, the towing can be carried out. When the faulty vehicle needs to enter a normal driving state after being repaired, the actuator 143 can be controlled to drive the connecting tube 142 to move so that the second end of the connecting tube 142 is connected to the chamber 112; then the air pump 141 is controlled to supply air so that the chamber 112 is in a positive pressure state, thereby moving the connecting member 130 from the second position to the first position; then the actuator 143 is controlled to drive the connecting tube 142 to move so that the second end of the connecting tube 142 is separated from the chamber 112, the chamber 112 is kept in a positive pressure state, and the connecting member 130 is kept in the first position. The second transmission member 120 can be provided with an interface corresponding to the connecting tube 142 and connected to the chamber 112, and when the connecting tube 142 moves, its second end can be extended into the interface to evacuate or supply air to the chamber 112, or, be drawn out from the interface. A sealing structure can be provided in the chamber 112, and the sealing structure is used to seal the interface when the connecting tube 142 is drawn out from the interface to prevent air leakage in the chamber 112.

[0057] In this embodiment, the actuator 143 includes a cylinder, and the piston rod of the cylinder is connected to the second end of the connecting tube 142 to drive the connecting tube 142 to move. In some other embodiments, the actuator 143 can also be a motor or other suitable device capable of driving the connecting tube 142 to move.

[0058] In this embodiment, the drive assembly 140 is integrated in the power coupling device 100. In other embodiments, the drive assembly 140 may not be provided in the power coupling device 100. When the vehicle needs to enter the trailer state, the staff uses a separate exhaust device (such as an air pump and a connecting pipe independent of the power coupling device 100 or the vehicle) to exhaust air from the chamber 112 to move the connector 130 from the first position to the second position.

[0059] In this embodiment, the power coupling device 100 further includes a first position sensor, which is disposed in the receiving groove 111 and / or the groove 121, and is used to detect the position of the sliding block 131. The data information fed back by the first position sensor is used to characterize the matching relationship between the sliding block 131 and the groove 121, so as to determine whether the connecting member 130 is in the second position. The first position sensor can be, for example, a distance measuring sensor disposed in the receiving groove 111 or the groove 121, which can be configured to measure the distance between the sliding block 131 and the groove 121, and then determine the matching relationship between the sliding block 131 and the groove 121. The first position sensor can also be a contact sensor or a proximity sensor, which can have two, respectively disposed in the receiving groove 111 and the groove 121, and different first position sensors can be triggered respectively when the connecting member 130 is in the first position and the second position. Therefore, according to the detection result of the first position sensor, the towing can be performed only when it is determined that the connecting member 130 is in the second position. This is to avoid towing when the connecting member 130 is not in the second position, causing the drive device 200 to generate a back electromotive force.

[0060] In this embodiment, the power coupling device 100 further includes a second position sensor, which is disposed on the first transmission member 110 and / or the second transmission member 120, and is used to detect the relative position of the first transmission member 110 and the second transmission member 120. The second position sensor may, for example, include two angle sensors disposed on the first transmission member 110 and the second transmission member 120, which are used to detect the rotation angles of the first transmission member 110 and the second transmission member 120, and then the relative position of the first transmission member 110 and the second transmission member 120 can be determined accordingly. Therefore, according to the detection result of the second position sensor, when it is determined that the positions of the receiving groove 111 and the groove 121 correspond, the connecting member 130 can be controlled to move from the second position to the first position.

[0061] In some other embodiments, the first transmission member 110 may be directly or indirectly connected to the vehicle's drive shaft 300, and the vehicle's drive shaft 300 is connected to the vehicle's wheels to drive the wheels to rotate. The second transmission member 120 may be directly or indirectly connected to the vehicle's drive device 200, that is, directly or indirectly connected to the output shaft of the motor in the drive device 200.

[0062] In some other embodiments, the connecting member 130 may only include a slider 131, the first transmission member 110 may only be provided with a receiving groove 111 corresponding to the connecting member 130, and the driving assembly 140 may include a motor and a transmission structure connected to the first transmission member 110, and the motor is connected to the slider 131 through the transmission structure to drive the slider 131 to switch between the first position and the second position. It should be noted that the driving assembly 140 may also be other structural forms known to those skilled in the art, as long as it can drive the connecting member 130 to move to switch between the first position and the second position.

[0063] The present application also provides a power assembly, which includes the power coupling device 100 as described above.

[0064] The present application also provides a vehicle, which includes the powertrain as described above. The vehicle is a motor-driven vehicle, and the motor may be a permanent magnet synchronous motor or other motor that can generate back electromotive force.

[0065] Although example embodiments have been described herein with reference to the accompanying drawings, it should be understood that the above example embodiments are merely exemplary and are not intended to limit the scope of the present application to this. Those of ordinary skill in the art may make various changes and modifications therein without departing from the scope and spirit of the present application. All these changes and modifications are intended to be included within the scope of the present application as required by the appended claims.

[0066] In the description provided herein, a large number of specific details are described. However, it is understood that the embodiments of the present application can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0067] Similarly, it should be understood that in order to streamline the present application and help understand one or more of the various utility model aspects, in the description of the exemplary embodiments of the present application, the various features of the present application are sometimes grouped together into a single embodiment, figure, or description thereof. However, the method of the present application should not be interpreted as reflecting the following intention: the claimed application requires more features than the features explicitly stated in each claim. More specifically, as reflected in the corresponding claims, the inventive point is that the corresponding technical problem can be solved with features that are less than all the features of a single disclosed embodiment. Therefore, the claims following the specific embodiment are hereby explicitly incorporated into the specific embodiment, wherein each claim itself serves as a separate embodiment of the present application.

[0068] It will be understood by those skilled in the art that, except for mutually exclusive features, all features disclosed in this specification (including the accompanying claims, abstracts and drawings) and all processes or units of any method or device disclosed in this specification may be combined in any combination. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstracts and drawings) may be replaced by an alternative feature that provides the same, equivalent or similar purpose.

[0069] In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0070] It should be noted that the above-mentioned embodiments illustrate rather than limit the invention and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims.

Claims

1. A power coupling device, characterized in that: include: a first transmission member connected to one of the driving device and the driving shaft; A connecting member, a first end of which is connected to the first transmission member; a second transmission member, the second transmission member being connectable to the second end of the connecting member, the second transmission member being connected to the other of the driving device and the driving shaft; When the connecting member is in the first position, the first transmission member is connected to the second transmission member through the connecting member; When the connecting member is in the second position, the connecting member is disconnected from the second transmission member.

2. The power coupling device according to claim 1, characterized in that: A driving assembly is connected to the connecting member, and the driving assembly is used to drive the connecting member to switch between the first position and the second position.

3. The power coupling device according to claim 2, characterized in that: The drive assembly comprises: An air pump, when the air pump supplies air to the power coupling device, the connecting member is in the first position, and when the air pump draws air from the power coupling device, the connecting member is in the second position.

4. The power coupling device according to any one of claims 1 to 3, characterized in that: The first transmission member is disposed around the outside of the second transmission member; or, The second transmission member is disposed around the outside of the first transmission member.

5. The power coupling device according to claim 4, characterized in that: A receiving groove is provided on a side of the first transmission member facing the second transmission member; The connecting member comprises a sliding block, and the sliding block can move in the receiving groove; A groove is provided on a side of the second transmission member facing the first transmission member; When the sliding block is in the first position, the sliding block is at least partially located in the groove; When the sliding block is at the second position, none of the sliding blocks are located in the groove.

6. The power coupling device according to claim 5, characterized in that: The first transmission member further comprises a chamber; the connecting member further comprises a sealing member connected to the sliding block; The seal is movable within the chamber, and the seal is used to seal the chamber.

7. The power coupling device according to claim 6, characterized in that: The length of the chamber along the first direction: the length of the groove along the first direction=1.2-1.5:

1.

8. The power coupling device according to claim 5, characterized in that: The power coupling device also includes: A first position sensor, wherein the first position sensor is disposed in the receiving slot and / or the groove, and data information fed back by the first position sensor is used to characterize the matching relationship between the sliding block and the groove.

9. The power coupling device according to claim 5, characterized in that: The power coupling device also includes: The second position sensor is disposed on the first transmission member and / or the second transmission member, and is used to detect the relative position of the first transmission member and the second transmission member.

10. The power coupling device according to claim 5, characterized in that: There are at least two of the receiving slots, the grooves and the sliding blocks.

11. A powertrain, characterized in that: Comprising a power coupling device as claimed in any one of claims 1 to 10.

12. A vehicle, characterized in that: Comprising the powertrain as claimed in claim 11.

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