Torsion transmission structure, range extending driving structure and vehicle

Abstract

The invention provides a torsion transmission structure, a range extending driving structure and a vehicle, the torsion transmission structure comprises a transmission assembly, the transmission assembly comprises a first transmission shaft, a second transmission shaft and a torsion shaft, the first transmission shaft is provided with a first tooth-shaped structure, and the second transmission shaft is provided with a second tooth-shaped structure; the torsion shaft is connected with and matched with the first transmission shaft and the second transmission shaft in a rotation stopping mode. The first transmission shaft has an initial state and a transmission state. The clutch piece is movably arranged, the clutch piece is provided with a locking position and a releasing position, the crankshaft is provided with a third tooth-shaped structure, and when the clutch piece is located at the releasing position, the first tooth-shaped structure and the second tooth-shaped structure are both engaged with the third tooth-shaped structure; and one of the two adjacent transmission teeth of the third tooth-shaped structure is attached to the transmission teeth of the first tooth-shaped structure, and the other one of the two adjacent transmission teeth of the third tooth-shaped structure is attached to the transmission teeth of the second tooth-shaped structure. Through the scheme, the problem that connection of the crankshaft and the rotor cannot meet the use requirement can be solved.

Description

Technical Field

[0001] This invention relates to the field of new energy vehicle technology, and more specifically, to a torque transmission structure, a range-extending drive structure, and a vehicle. Background Technology

[0002] Existing range extender engines primarily use a dual-mass flywheel or a single-mass flywheel with a torque limiter to connect the crankshaft and the motor shaft. Figure 1 The diagram shows a traditional crankshaft and dual-mass flywheel 1 connection structure for a range extender. The connection between a single-mass flywheel and a torque limiter is similar. Both methods involve connecting flywheel 1 to the rear flange of the crankshaft using flywheel bolts 2, and connecting the other side to the motor shaft via a spline. The structures of the dual-mass flywheel 1 and the single-mass flywheel and torque limiter connection are complex, require more space, and have a higher overall cost.

[0003] In some models, the connection design involves machining splines in the rear bore of the engine crankshaft and on the rotor. The motor splined shaft is directly inserted into the crankshaft splined bore, thus achieving power transmission between the crankshaft and the rotor. Figure 2 As shown. For ease of disassembly and assembly, the splined bore at the rear end of the crankshaft and the splined joint on the rotor are generally fitted with a clearance fit. However, during engine operation, the engine's power output fluctuates, and the clearance fit of the splined joint will generate knocking noise, affecting the overall NVH (noise, vibration, and harshness) of the vehicle. Since new energy vehicles have high NVH requirements, knocking noise will affect the overall vehicle quality and cause customer complaints. Some manufacturers consider using an interference fit between the splined shaft and the splined bore in their designs. Although this can avoid the knocking noise problem caused by the clearance fit of the splined joint, it is inconvenient to disassemble and assemble. Furthermore, since both the crankshaft and the rotor have a certain axial movement requirement, an interference fit will cause the crankshaft to be subjected to uneven force on one side, leading to excessive wear and failure of the crankshaft thrust washers during engine operation, ultimately resulting in engine failure. Summary of the Invention

[0004] This invention provides a torque transmission structure, a range extender drive structure, and a vehicle to solve the problem that the crankshaft and rotor connection in related technologies cannot meet the usage requirements.

[0005] According to one aspect of the present invention, a torque transmission structure is provided, comprising: a transmission assembly including a first transmission shaft, a second transmission shaft, and a torque shaft coaxially arranged; the first transmission shaft having a first tooth profile, the second transmission shaft having a second tooth profile, and the two ends of the torque shaft being connected to the first transmission shaft and the second transmission shaft respectively and engaging with anti-rotation; the first transmission shaft having an initial state in which the first tooth profile and the second tooth profile are aligned, and a transmission state in which the first tooth profile and the second tooth profile are misaligned; a clutch movably disposed along the axial direction of the first transmission shaft, the clutch having a locked position and a released position; when the clutch is in the locked position, the transmission shaft is in the initial state, and when the clutch is in the released position, the transmission shaft is in the transmission state; wherein, the crankshaft has a third tooth profile; when the clutch is in the released position, both the first tooth profile and the second tooth profile mesh with the third tooth profile, and one of two adjacent transmission teeth of the third tooth profile engages with a transmission tooth of the first tooth profile, and the other of two adjacent transmission teeth of the third tooth profile engages with a transmission tooth of the second tooth profile.

[0006] Furthermore, the clutch has a fourth tooth structure. When the clutch is in the locked position, both the first and second tooth structures engage with the fourth tooth structure. When the clutch is in the released position, the fourth tooth structure disengages from either the first or second tooth structure.

[0007] Furthermore, the crankshaft or the rotor of the drive motor can drive the clutch to move from the locked position to the released position.

[0008] Furthermore, the end face of the crankshaft can be engaged with the end face of the clutch to move the clutch from the locked position to the released position. When the clutch is in the released position, the clutch disengages from the first drive shaft and moves onto the second drive shaft, and the fourth tooth structure meshes with the second tooth structure.

[0009] Furthermore, the crankshaft has a crankshaft bore, a third tooth structure is disposed on the inner sidewall of the crankshaft bore, a first tooth structure is disposed on the outer sidewall of the first transmission shaft, a second tooth structure is disposed on the outer sidewall of the second transmission shaft, the clutch is a clutch sleeve, and a fourth tooth structure is disposed on the inner sidewall of the clutch sleeve. When the clutch is in the locked position, the clutch sleeve is sleeved on the outer periphery of the first and second transmission shafts. When the clutch moves from the locked position to the released position, the clutch sleeve is sleeved on the outer periphery of the second transmission shaft, and the first transmission shaft and part of the second transmission shaft are located in the crankshaft bore.

[0010] Furthermore, the clutch sleeve includes a sleeve and multiple anti-rotation protrusions disposed on the end face of the sleeve. The multiple anti-rotation protrusions are spaced apart along the circumference of the sleeve. A fourth tooth structure extends to the anti-rotation protrusions. The wall of the crankshaft bore has multiple anti-rotation grooves, and the multiple anti-rotation protrusions are inserted into the multiple anti-rotation grooves one by one.

[0011] Furthermore, the first drive shaft has a drive hole, the second drive shaft has a center hole, and the two ends of the torque shaft are respectively inserted into the drive hole and the center hole, and are anti-rotationally engaged with the drive hole and the center hole.

[0012] Furthermore, a positioning protrusion is provided on the side of the first drive shaft facing the second drive shaft, and the central hole includes a positioning hole section and an anti-rotation hole section that are connected. The torque shaft is anti-rotated in conjunction with the anti-rotation hole section, and the positioning protrusion is inserted into the positioning hole section and is clearance-fitted with the positioning hole section.

[0013] Furthermore, the center hole also includes a process hole section, which is located on the side of the anti-rotation hole section away from the positioning hole section. The process hole section is connected to the anti-rotation hole section. The torque transmission structure also includes a screw plug, which is set in the process hole section and threadedly connected to the process hole section.

[0014] Furthermore, an operating part is provided on the side of the first drive shaft opposite to the second drive shaft. The operating part enables the first drive shaft to rotate relative to the second drive shaft, thereby switching the first drive shaft from the initial state to the transmission state.

[0015] According to another aspect of the present invention, a range extender drive structure is provided, comprising: a range extender having a crankshaft; a drive motor including a housing and a rotor rotatably disposed within the housing; and a torque transmission structure having a second drive shaft connected to the rotor, wherein the torque transmission structure is the torque transmission structure provided above.

[0016] Furthermore, the rotor has a connecting hole, the inner wall of the connecting hole has a fifth tooth structure, the second tooth structure of the second drive shaft is disposed on the outer wall of the second drive shaft, the second drive shaft is inserted into the connecting hole, the second drive shaft and the connecting hole are transition fit or interference fit, and the fifth tooth structure meshes with the second tooth structure.

[0017] According to another aspect of the present invention, a vehicle is provided, the vehicle including the range-extending drive structure provided above.

[0018] Applying the technical solution of this invention, the torque transmission structure includes a transmission assembly and a clutch. The second transmission shaft is interference-fitted or transition-fitted to the rotor of the drive motor. Both ends of the torque shaft are connected to the first and second transmission shafts respectively, forming an anti-rotation fit. With the clutch in the released position, the first transmission shaft is rotated, switching it from a transmission state where the first and second tooth structures are misaligned to an initial state where the first and second tooth structures are aligned. At this time, the torque shaft twists under the drive of the first transmission shaft, generating a certain torque, which moves the clutch from the released position. Move the clutch to the locked position, connecting the torque transmission structure to the crankshaft, and move the clutch from the locked position to the released position. Under the torque of the torque shaft, the first drive shaft rotates relative to the second drive shaft, switching from the initial state to the transmission state. The first and second toothed structures are misaligned, both meshing with the third toothed structure. Furthermore, one of the two adjacent transmission teeth of the third toothed structure engages with a transmission tooth of the first toothed structure, and the other of the two adjacent transmission teeth of the third toothed structure engages with a transmission tooth of the second toothed structure. This eliminates backlash between the transmission teeth of the drive shaft and crankshaft using the first and second toothed structures. Moreover, during disassembly, only the second drive shaft needs to be separated from the torque shaft to separate the first drive shaft from the crankshaft. This prevents engine failure due to axial movement during engine operation, which could cause the crankshaft to be biased to one side, and also does not affect the overall NVH (noise, vibration, and harshness) of the vehicle, improving the driving experience. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0020] Figure 1 An exploded view of the crankshaft and flywheel in the related technology is shown;

[0021] Figure 2 Exploded views of crankshafts and rotors in related technologies are shown;

[0022] Figure 3 An exploded view of a range-extending drive structure provided according to an embodiment of the present invention is shown;

[0023] Figure 4 A cross-sectional view of a range-extending drive structure provided according to an embodiment of the present invention is shown;

[0024] Figure 5 A structural diagram of a crankshaft with a range-extending drive structure provided according to an embodiment of the present invention is shown;

[0025] Figure 6A structural diagram of the first transmission shaft of the torque transmission structure provided according to an embodiment of the present invention is shown;

[0026] Figure 7 A structural diagram of the clutch component of the torque transmission structure provided according to an embodiment of the present invention is shown;

[0027] Figure 8 A structural diagram of the second transmission shaft of the torque transmission structure provided according to an embodiment of the present invention is shown;

[0028] Figure 9 A cross-sectional view of the second transmission shaft of the torque transmission structure provided according to an embodiment of the present invention is shown;

[0029] Figure 10 A structural diagram of the screw plug of the torque transmission structure provided according to an embodiment of the present invention is shown;

[0030] Figure 11 A structural diagram of the torque shaft of the torque transmission structure provided according to an embodiment of the present invention is shown;

[0031] Figure 12 A structural diagram of the rotor of the range-extending drive structure provided according to an embodiment of the present invention is shown.

[0032] The above figures include the following reference numerals:

[0033] 1. Flywheel; 2. Flywheel bolts;

[0034] 10. Transmission assembly; 11. First transmission shaft; 111. First toothed structure; 112. Transmission hole; 113. Positioning protrusion; 114. Operating part; 12. Second transmission shaft; 121. Second toothed structure; 122. Center hole; 123. Positioning hole section; 124. Anti-rotation hole section; 125. Process hole section; 13. Torque shaft;

[0035] 20. Clutch element; 21. Fourth tooth structure; 22. Sleeve; 23. Anti-rotation protrusion;

[0036] 30. Crankshaft; 31. Third tooth profile structure; 32. Crankshaft bore; 321. Anti-rotation groove;

[0037] 40. Screw plug;

[0038] 50. Rotor; 51. Connecting hole; 511. Fifth tooth structure. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] like Figures 3 to 12 As shown, this embodiment of the invention provides a torque transmission structure, which includes a transmission assembly 10 and a clutch 20. The transmission assembly 10 includes a first transmission shaft 11, a second transmission shaft 12, and a torque shaft 13 coaxially arranged. The first transmission shaft 11 has a first tooth structure 111, and the second transmission shaft 12 has a second tooth structure 121. The two ends of the torque shaft 13 are respectively connected to the first transmission shaft 11 and the second transmission shaft 12 and are anti-rotationally engaged. The first transmission shaft 11 has an initial state in which the first tooth structure 111 and the second tooth structure 121 are aligned, and a transmission state in which the first tooth structure 111 and the second tooth structure 121 are misaligned. The clutch 20... The first drive shaft 11 is axially movable. The clutch 20 has a locked position and a released position. When the clutch 20 is in the locked position, the drive shaft is in the initial state. When the clutch 20 is in the released position, the drive shaft is in the transmission state. The crankshaft 30 has a third tooth structure 31. When the clutch 20 is in the released position, both the first tooth structure 111 and the second tooth structure 121 are engaged with the third tooth structure 31. One of the two adjacent transmission teeth of the third tooth structure 31 is in contact with the transmission tooth of the first tooth structure 111, and the other of the two adjacent transmission teeth of the third tooth structure 31 is in contact with the transmission tooth of the second tooth structure 121.

[0041] Applying the technical solution of this invention, the torque transmission structure includes a transmission assembly 10 and a clutch 20. The second transmission shaft 12 is interference-fitted or transition-fitted to the rotor 50 of the drive motor. Both ends of the torque shaft 13 are connected to the first transmission shaft 11 and the second transmission shaft 12 respectively, forming an anti-rotation fit. With the clutch 20 in the released position, the first transmission shaft 11 is rotated, switching it from a transmission state where the first tooth structure 111 and the second tooth structure 121 are misaligned to an initial state where the first tooth structure 111 and the second tooth structure 121 are aligned. At this time, the torque shaft 13 twists under the drive of the first transmission shaft 11 and generates a certain torque, moving the clutch 20 from the released position. Moved to the locked position, the torque transmission structure is connected to the crankshaft 30, and the clutch 20 is moved from the locked position to the released position. Under the torque of the torque shaft 13, the first transmission shaft 11 rotates relative to the second transmission shaft 12, and the first transmission shaft 11 switches from the initial state to the transmission state. The first tooth structure 111 and the second tooth structure 121 are misaligned, and both the first tooth structure 111 and the second tooth structure 121 mesh with the third tooth structure 31. Furthermore, one of the two adjacent transmission teeth of the third tooth structure 31 is in contact with the transmission tooth of the first tooth structure 111, and the other of the two adjacent transmission teeth of the third tooth structure 31 is in contact with the transmission tooth of the second tooth structure 121. Thus, the backlash between the transmission teeth of the transmission shaft and the crankshaft 30 is eliminated by the first tooth structure 111 and the second tooth structure 121. Moreover, during disassembly, only the second transmission shaft 12 needs to be separated from the torque shaft 13 to separate the first transmission shaft 11 from the crankshaft 30. It will not cause engine failure due to axial movement during engine operation, which would cause the crankshaft 30 to be biased to one side, nor will it affect the NVH of the whole vehicle, thus improving the driving experience.

[0042] The torque shaft 13 is used to generate torque and store the potential energy generated when the first drive shaft 11 rotates relative to the second drive shaft 12. To facilitate the arrangement of the clutch 20 and the torque shaft 13, one of the clutch 20 and the torque shaft 13 can be arranged inside the first drive shaft 11 and the second drive shaft 12, and the other can be arranged outside the first drive shaft 11 and the second drive shaft 12.

[0043] It should be noted that the movement of clutch 20 can be achieved by setting an additional drive component, or by using crankshaft 30 or rotor 50 to drive the movement of clutch 20 during installation.

[0044] Furthermore, when the clutch 20 is in the locked position, the first tooth structure 111 and the second tooth structure 121 are respectively in clearance fit with the third tooth structure 31.

[0045] The torque of the torsion shaft 13 needs to be calculated based on the engine speed fluctuations and the overall inertia of the crankshaft rear end. The misalignment angle of the transmission teeth on the first transmission shaft 11 and the second transmission shaft 12 in the free state can be calculated based on the magnitude of the preload torque, the diameter and length of the torsion shaft 13, and the elastic modulus of the material. Under the premise of the same torsion angle, different torques can be obtained by adjusting the material, diameter, or length of the torsion shaft 13.

[0046] like Figure 7 As shown, the clutch 20 has a fourth toothed structure 21. When the clutch 20 is in the locked position, both the first toothed structure 111 and the second toothed structure 121 engage with the fourth toothed structure 21. When the clutch 20 is in the released position, the fourth toothed structure 21 disengages from either the first toothed structure 111 or the second toothed structure 121. Using this structure, the first drive shaft 11 is limited to its initial state by the engagement of the toothed structures, offering advantages such as simple structure and ease of operation.

[0047] The crankshaft 30 or the rotor 50 of the drive motor can drive the clutch 20 from the locked position to the released position. During installation, the crankshaft 30 or the rotor 50 is used to drive the clutch 20, which has the advantages of simple structure and easy operation.

[0048] like Figure 4 As shown, the end face of the crankshaft 30 can be engaged with the end face of the clutch 20, allowing the clutch 20 to move from the locked position to the released position. When the clutch 20 is in the released position, it disengages from the first drive shaft 11 and moves onto the second drive shaft 12, where the fourth tooth structure 21 meshes with the second tooth structure 121. By using end face contact, the crankshaft 30 drives the clutch 20, eliminating the need for additional components on the crankshaft 30 and offering the advantage of a simple structure.

[0049] like Figure 3 As shown, the crankshaft 30 has a crankshaft bore 32. A third tooth structure 31 is disposed on the inner wall of the crankshaft bore 32, a first tooth structure 111 is disposed on the outer wall of the first drive shaft 11, and a second tooth structure 121 is disposed on the outer wall of the second drive shaft 12. The clutch element 20 is a clutch sleeve, and a fourth tooth structure 21 is disposed on the inner wall of the clutch sleeve. When the clutch element 20 is in the locked position, the clutch sleeve is fitted around the outer periphery of the first drive shaft 11 and the second drive shaft 12. When the clutch element 20 moves from the locked position to the released position, the clutch sleeve is fitted around the outer periphery of the second drive shaft 12, and the first drive shaft 11 and part of the second drive shaft 12 are located in the crankshaft bore 32. Using the above structure, with the clutch element 20 configured as a clutch sleeve and fitted around the outer periphery of the first drive shaft 11 and the second drive shaft 12, has the advantages of simple structure and ease of operation.

[0050] like Figure 5 and Figure 7 As shown, the clutch sleeve includes a sleeve 22 and multiple anti-rotation protrusions 23 disposed on the end face of the sleeve 22. The multiple anti-rotation protrusions 23 are spaced apart circumferentially along the sleeve 22. The fourth tooth structure 21 extends to the anti-rotation protrusions 23. The bore wall of the crankshaft bore 32 has multiple anti-rotation grooves 321, and the multiple anti-rotation protrusions 23 are inserted into the multiple anti-rotation grooves 321 in a one-to-one correspondence. Through the cooperation of the anti-rotation protrusions 23 and the anti-rotation grooves 321, the crankshaft 30 can be securely connected to the clutch sleeve, so that the movement of the clutch sleeve is smoother.

[0051] In this embodiment, after the clutch 20 moves to the release position, there is a certain axial gap between the end face of the clutch 20 and the end face of the rotor 50, thereby avoiding direct hard contact between the clutch 20 and the rotor 50. During engine operation, due to axial movement, damage to the rotor 50 is avoided.

[0052] like Figure 6 As shown, the first drive shaft 11 has a drive hole 112, and the second drive shaft 12 has a center hole 122. The two ends of the torque shaft 13 are respectively inserted into the drive hole 112 and the center hole 122, and are anti-rotationally engaged with the drive hole 112 and the center hole 122. By providing the drive hole 112 and the center hole 122, the torque shaft 13 can be housed within the first drive shaft 11 and the second drive shaft 12, which facilitates assembly.

[0053] like Figure 6 and Figure 9 As shown, a positioning protrusion 113 is provided on the side of the first drive shaft 11 facing the second drive shaft 12. The central hole 122 includes a connecting positioning hole section 123 and an anti-rotation hole section 124. The torque shaft 13 is anti-rotatingly engaged with the anti-rotation hole section 124. The positioning protrusion 113 is inserted into the positioning hole section 123 and has a clearance fit with the positioning hole section 123. By utilizing the engagement of the positioning protrusion 113 and the positioning hole section 123, the axes of the first drive shaft 11 and the second drive shaft 12 can be aligned, making the power transmission more stable.

[0054] In this embodiment, both the transmission hole 112 and the anti-rotation hole section 124 are square holes, and both ends of the torque shaft 13 are square heads. The square heads are inserted into the square holes to form an anti-rotation fit.

[0055] like Figure 9 As shown, the central hole 122 also includes a process hole section 125, which is located on the side of the anti-rotation hole section 124 away from the positioning hole section 123. The process hole section 125 is connected to the anti-rotation hole section 124. The torque transmission structure also includes a screw plug 40, which is disposed in the process hole section 125 and threadedly connected to it. By using the screw plug 40 to seal the process hole, it is possible to prevent the torque shaft 13 from dislodging from the process hole section 125 when it undergoes axial movement.

[0056] like Figure 6 As shown, an operating part 114 is provided on the side of the first drive shaft 11 opposite to the second drive shaft 12. The operating part 114 enables the first drive shaft 11 to rotate relative to the second drive shaft 12, thereby switching the first drive shaft 11 from the initial state to the transmission state. The operating part 114 facilitates the operation of the first drive shaft 11, allowing it to rotate relative to the second drive shaft 12.

[0057] In this embodiment, the operating part 114 is an external hexagonal head.

[0058] Another embodiment of the present invention provides a range extender drive structure, which includes a range extender, a drive motor, and a torque transmission structure. The range extender has a crankshaft 30; the drive motor includes a housing and a rotor 50 rotatably disposed within the housing; the second transmission shaft 12 of the torque transmission structure is connected to the rotor 50, and the torque transmission structure is the torque transmission structure provided above. Using the above-described range extender drive structure, under the torque of the torque shaft 13, the first transmission shaft 11 rotates relative to the second transmission shaft 12, and the first transmission shaft 11 switches from an initial state to a transmission state. The first tooth structure 111 and the second tooth structure 121 are misaligned, and both the first tooth structure 111 and the second tooth structure 121 mesh with the third tooth structure 31. Furthermore, one of the two adjacent transmission teeth of the third tooth structure 31 engages with the transmission tooth of the first tooth structure 111, and the other of the two adjacent transmission teeth of the third tooth structure 31 engages with the transmission tooth of the second tooth structure 121. Furthermore, the backlash between the transmission teeth of the drive shaft and crankshaft 30 is eliminated by utilizing the first tooth structure 111 and the second tooth structure 121. Moreover, during disassembly, only the second drive shaft 12 needs to be separated from the torque shaft 13 to separate the first drive shaft 11 from the crankshaft 30. This prevents engine failure due to axial movement during engine operation, which could cause the crankshaft 30 to be subjected to uneven force, and also does not affect the overall NVH (noise, vibration, and harshness) of the vehicle, thus improving the driving experience.

[0059] like Figure 12 As shown, the rotor 50 has a connecting hole 51, and the inner wall of the connecting hole 51 has a fifth tooth structure 511. The second tooth structure 121 of the second drive shaft 12 is disposed on the outer wall of the second drive shaft 12. The second drive shaft 12 is inserted into the connecting hole 51, and the second drive shaft 12 and the connecting hole 51 are fitted with a transition fit or an interference fit. The fifth tooth structure 511 meshes with the second tooth structure 121. The above-described connection structure has the advantages of simple structure and easy assembly.

[0060] Another embodiment of the present invention provides a vehicle including the range-extending drive structure described above. Under the torque of the torque shaft 13, the first drive shaft 11 rotates relative to the second drive shaft 12, and the first drive shaft 11 switches from an initial state to a transmission state. The first tooth structure 111 and the second tooth structure 121 are misaligned, and both the first tooth structure 111 and the second tooth structure 121 mesh with the third tooth structure 31. Furthermore, one of the two adjacent transmission teeth of the third tooth structure 31 engages with the transmission teeth of the first tooth structure 111, and the other of the two adjacent transmission teeth of the third tooth structure 31 engages with the transmission teeth of the second tooth structure 121. Thus, the backlash between the transmission teeth of the drive shaft and the crankshaft 30 is eliminated by utilizing the first tooth structure 111 and the second tooth structure 121. Moreover, during disassembly, only the second drive shaft 12 needs to be separated from the torque shaft 13 to separate the first drive shaft 11 from the crankshaft 30. It will not cause engine failure due to axial movement during engine operation, which would cause the crankshaft 30 to be biased to one side, nor will it affect the NVH of the whole vehicle, thus improving the driving experience.

[0061] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0062] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0063] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0064] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0065] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0066] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A torque transmission structure, characterized in that, The torque transmission structure includes: The transmission assembly (10) includes a first transmission shaft (11), a second transmission shaft (12), and a torque shaft (13) arranged coaxially. The first transmission shaft (11) has a first tooth structure (111), and the second transmission shaft (12) has a second tooth structure (121). The two ends of the torque shaft (13) are respectively connected to the first transmission shaft (11) and the second transmission shaft (12) and are anti-rotationally engaged. The first transmission shaft (11) has an initial state in which the first tooth structure (111) and the second tooth structure (121) are aligned, and a transmission state in which the first tooth structure (111) and the second tooth structure (121) are misaligned. The clutch (20) is movably disposed along the axial direction of the first transmission shaft (11). The clutch (20) has a locked position and a released position. When the clutch (20) is in the locked position, the transmission shaft is in the initial state. When the clutch (20) is in the released position, the transmission shaft is in the transmission state. The crankshaft (30) has a third tooth structure (31). When the clutch (20) is in the release position, both the first tooth structure (111) and the second tooth structure (121) are engaged with the third tooth structure (31). One of the two adjacent transmission teeth of the third tooth structure (31) is in contact with the transmission tooth of the first tooth structure (111), and the other of the two adjacent transmission teeth of the third tooth structure (31) is in contact with the transmission tooth of the second tooth structure (121).

2. The torque transmission structure according to claim 1, characterized in that, The clutch (20) has a fourth tooth structure (21). When the clutch (20) is in the locked position, both the first tooth structure (111) and the second tooth structure (121) are engaged with the fourth tooth structure (21). When the clutch (20) is in the released position, the fourth tooth structure (21) is disengaged from either the first tooth structure (111) or the second tooth structure (121).

3. The torque transmission structure according to claim 2, characterized in that, The crankshaft (30) or the rotor (50) of the drive motor can drive the clutch (20) to move from the locked position to the released position.

4. The torque transmission structure according to claim 3, characterized in that, The end face of the crankshaft (30) can be engaged with the end face of the clutch (20) so that the clutch (20) moves from the locked position to the released position. When the clutch (20) is in the released position, the clutch (20) disengages from the first drive shaft (11) and moves to the second drive shaft (12), and the fourth tooth structure (21) meshes with the second tooth structure (121).

5. The torque transmission structure according to claim 2, characterized in that, The crankshaft (30) has a crankshaft hole (32), the third tooth structure (31) is disposed on the inner sidewall of the crankshaft hole (32), the first tooth structure (111) is disposed on the outer sidewall of the first transmission shaft (11), the second tooth structure (121) is disposed on the outer sidewall of the second transmission shaft (12), the clutch (20) is a clutch sleeve, the fourth tooth structure (21) is disposed on the inner sidewall of the clutch sleeve. When the clutch (20) is in the locked position, the clutch sleeve is sleeved on the outer periphery of the first transmission shaft (11) and the second transmission shaft (12). When the clutch (20) moves from the locked position to the released position, the clutch sleeve is sleeved on the outer periphery of the second transmission shaft (12), and the first transmission shaft (11) and part of the second transmission shaft (12) are located in the crankshaft hole (32).

6. The torque transmission structure according to claim 5, characterized in that, The clutch sleeve includes a sleeve (22) and a plurality of anti-rotation protrusions (23) disposed on the end face of the sleeve (22). The plurality of anti-rotation protrusions (23) are spaced apart along the circumference of the sleeve (22). The fourth tooth structure (21) extends to the anti-rotation protrusions (23). The wall of the crankshaft hole (32) has a plurality of anti-rotation grooves (321). The plurality of anti-rotation protrusions (23) are inserted into the plurality of anti-rotation grooves (321) one by one.

7. The torque transmission structure according to claim 1, characterized in that, The first drive shaft (11) has a drive hole (112), the second drive shaft (12) has a center hole (122), and the two ends of the torque shaft (13) are respectively inserted into the drive hole (112) and the center hole (122), and are anti-rotationally engaged with the drive hole (112) and the center hole (122).

8. The torque transmission structure according to claim 7, characterized in that, The first drive shaft (11) is provided with a positioning protrusion (113) on the side facing the second drive shaft (12). The central hole (122) includes a positioning hole section (123) and an anti-rotation hole section (124) that are connected. The torque shaft (13) is anti-rotatingly engaged with the anti-rotation hole section (124). The positioning protrusion (113) is inserted into the positioning hole section (123) and is clearance-fitted with the positioning hole section (123).

9. The torque transmission structure according to claim 8, characterized in that, The central hole (122) further includes a process hole section (125), which is located on the side of the anti-rotation hole section (124) away from the positioning hole section (123). The process hole section (125) communicates with the anti-rotation hole section (124). The torque transmission structure further includes a screw plug (40), which is disposed in the process hole section (125) and threadedly connected to the process hole section (125).

10. The torque transmission structure according to claim 1, characterized in that, An operating part (114) is provided on the side of the first transmission shaft (11) away from the second transmission shaft (12). The first transmission shaft (11) can be rotated relative to the second transmission shaft (12) through the operating part (114) so ​​that the first transmission shaft (11) can be switched from the initial state to the transmission state.

11. A range-extending drive structure, characterized in that, The range extender drive structure includes: Range extender, with crankshaft (30); The drive motor includes a housing and a rotor (50) rotatably disposed within the housing; A torque transmission structure, wherein the second transmission shaft (12) of the torque transmission structure is connected to the rotor (50), and the torque transmission structure is the torque transmission structure according to any one of claims 1 to 10.

12. The range extender drive structure according to claim 11, characterized in that, The rotor (50) has a connecting hole (51), the inner wall of the connecting hole (51) has a fifth tooth structure (511), the second tooth structure (121) of the second drive shaft (12) is disposed on the outer wall of the second drive shaft (12), the second drive shaft (12) is inserted into the connecting hole (51), the second drive shaft (12) and the connecting hole (51) are transition fit or interference fit, and the fifth tooth structure (511) meshes with the second tooth structure (121).

13. A vehicle, characterized in that, The vehicle includes the range-extended drive structure according to any one of claims 11 to 12.

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