Built-in power takeoff, speed reducer and new energy vehicle

Abstract

The utility model belongs to the technical field of new energy vehicles, and particularly relates to a built-in power takeoff, a speed reducer and a new energy vehicle. The utility model relates to a built-in power takeoff which comprises a power takeoff shaft arranged in a speed reducer and rotationally connected with a shell of the speed reducer. The power takeoff output shaft is arranged in the speed reducer, the power takeoff output shaft is rotationally connected with the speed reducer shell, and the axis of the power takeoff output shaft and the axis of the power takeoff shaft are located on the same straight line; the switching assembly comprises a driving mechanism and a transmission connecting piece, the driving mechanism is connected with the transmission connecting piece, and the transmission connecting piece is driven by the driving mechanism to move to the position where the first transmission connecting structure and the second transmission connecting structure are in transmission connection. Or the transmission connection between the first transmission connection structure and the second transmission connection structure is disconnected. The rotating speed of the power takeoff can be increased.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy vehicles, and in particular to a built-in power take-off, a reducer and a new energy vehicle. Background Art

[0002] For new energy vehicles, especially commercial vehicles, in addition to normal driving, they also need to use functions such as buckets, watering, and lifting. Therefore, in addition to providing power for normal driving of the vehicle, it is also necessary to provide some driving force required to realize other functions of the vehicle. In this regard, the prior art uses a power take-off connected to the reducer to output part of the power of the reducer as the driving force to realize other functions. However, the current power take-off is set outside the reducer, and the power take-off is not lubricated, so the speed is low. Utility Model Content

[0003] In view of this, the embodiments of the utility model provide a built-in power take-off, a reducer and a new energy vehicle, which are used to solve the technical problem of low rotation speed of the power take-off in the prior art.

[0004] The technical solution adopted by the utility model is:

[0005] In a first aspect, the utility model provides a built-in power take-off, comprising:

[0006] A power take-off shaft is arranged inside the reducer, the power take-off shaft is rotatably connected to the reducer housing, a transmission gear is arranged on the power take-off shaft, the transmission gear is used for transmission connection with the gear of the reducer, a first transmission connection structure is arranged on one end of the power take-off shaft away from the transmission gear, and the axial direction of the power take-off shaft is parallel to the axial direction of the reducer input shaft;

[0007] A power take-off output shaft is arranged inside the reducer, the power take-off output shaft is rotatably connected to the reducer housing, the axis of the power take-off output shaft is in the same straight line as the axis of the power take-off shaft, the power take-off output shaft is located at the end of the power take-off shaft away from the transmission gear, the end of the power take-off output shaft facing the power take-off shaft is provided with a second transmission connection structure, and the end of the power take-off output shaft facing away from the power take-off shaft is provided with a third transmission connection structure;

[0008] The switching assembly includes a driving mechanism and a transmission connecting member, wherein the driving mechanism is connected to the transmission connecting member, and the transmission connecting member is driven by the driving mechanism to move to a position where the first transmission connecting structure and the second transmission connecting structure are transmission connected, or to a position where the transmission connection between the first transmission connecting structure and the second transmission connecting structure is disconnected.

[0009] Preferably, the driving mechanism includes a driving member and a toggle member, the driving member is connected to the toggle member, and the driving member is used to drive the toggle member to move so as to drive the transmission connection member to move to a position where the first transmission connection structure and the second transmission connection structure are transmission connected, or to a position where the transmission connection between the first transmission connection structure and the second transmission connection structure is disconnected.

[0010] Preferably, the first connecting structure is an external spline, the second connecting structure is an external spline, and the transmission connection is a gear sleeve. When the gear sleeve moves to a position connected to both the second connecting structure and the first connecting structure, the first transmission connection structure and the second transmission connection structure form a transmission connection. When the gear sleeve moves to at least one unconnected position connected to both the second connecting structure and the first connecting structure, the transmission connection formed by the first transmission connection structure and the second transmission connection structure is disconnected.

[0011] Preferably, the outer diameter of the external splines of the first connection structure and the outer diameter of the external splines of the second connection structure are different.

[0012] Preferably, the driving mechanism also includes a return spring, one end of the return spring abuts against the reducer housing, and the other end opposite to the toggle member, a driving source input end is provided at the end of the driving member away from the return spring, the driving source input end is used to receive the force input by the driving source to compress the return spring, when the return spring is compressed, the driving member drives the transmission connection member to move to a position where the first transmission connection structure and the second transmission connection structure are transmission connected, when the return spring is reset, the driving member moves with the spring, and drives the transmission connection member to move to a position where the transmission connection between the first transmission connection structure and the second transmission connection structure is disconnected.

[0013] Preferably, the driving source is a fluid pressure source, and a frustum-shaped flange is arranged between the driving source input end of the driving member and the position where the driving member is connected to the toggle member, the side of the flange facing the driving source input end is a plane, and the side of the flange facing away from the driving source input end is an inclined surface, a sealing member is arranged on the side of the plane facing the driving source input end, and the driving source input end is provided with a blind hole recessed in the compression direction of the return spring.

[0014] Preferably, at least a portion of the gear sleeve is sleeved on the external spline of the power take-off output shaft, and a groove recessed toward the inner side of the gear sleeve is provided on the outer wall of the gear sleeve, and one end of the shifting member is inserted into the groove.

[0015] Preferably, the third transmission connection structure is an internal spline, and a first bearing shoulder and a second bearing shoulder are provided on the power take-off output shaft, the first bearing shoulder and the second bearing shoulder are located on the side of the power take-off input shaft away from the transmission connection member, and the internal spline extends from the end face of the drive source input end toward the direction close to the transmission connection member to a position between the first bearing shoulder and the second bearing shoulder.

[0016] In a second aspect, the utility model provides a reducer, which includes the built-in power take-off described in the first aspect.

[0017] In a third aspect, the utility model provides a new energy vehicle, which includes the reducer described in the second aspect.

[0018] Beneficial effects: The built-in power take-off, reducer and new energy vehicle of the utility model set the power take-off output shaft and the power take-off shaft inside the reducer, so the lubricating oil inside the reducer can be used to lubricate the power take-off, and the lubricating oil inside the reducer can flow to the transmission gear and the positions of each bearing, so that the power take-off is fully lubricated. The rotation speed of the power take-off can be significantly improved when it is well lubricated. Since the axial direction of the power take-off shaft is parallel to the axial direction of the reducer input shaft in this embodiment, and the power take-off output shaft and the power take-off shaft are coaxially arranged, the transmission connector in the switching assembly only needs to make a simple linear motion in the axial direction to realize the switching of the power take-off between gear and neutral gear. Therefore, the power take-off of this embodiment has a simple structure and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the drawings required for use in the embodiment of the utility model will be briefly introduced below. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work, and these are all within the protection scope of the utility model.

[0020] Figure 1 This is a schematic diagram of the structure of the built-in power take-off of the utility model;

[0021] Figure 2 It is a schematic diagram of the result when the built-in power take-off in the utility model is in a neutral state;

[0022] Figure 3 It is a schematic diagram of the result when the built-in power take-off in the utility model is in a gear-engaging state;

[0023] Figure 4 It is a partial structural schematic diagram of the middle driving member of the utility model;

[0024] Parts and their numbers in the picture:

[0025] Power take-off shaft 1, first transmission connection structure 11, power take-off output shaft 2, second transmission connection structure 21, third transmission connection structure 22, first bearing shoulder 23, second bearing shoulder 24, switching assembly 3, transmission connection member 31, driving member 32, driving source input end 321, flange 322, inclined surface 3221, plane 3222, blind hole 323, toggle member 33, groove 331, seal 34, return spring 35, transmission gear 4, first chamber 5, bottom wall 51, small hole 52, reducer housing 6. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the utility model. Moreover, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "includes..." do not exclude the presence of other identical elements in the process, method, article or device including the elements. If there is no conflict, the embodiments of the utility model and the various features in the embodiments can be combined with each other, all within the scope of protection of the utility model.

[0027] Example 1

[0028] like Figure 1 As shown, this embodiment provides a built-in power take-off, which includes a power take-off shaft 1, a power take-off output shaft 2 and a switching assembly 3.

[0029] The power take-off shaft 1 is arranged inside the reducer. A space for accommodating the power take-off shaft 1 can be arranged inside the reducer. Generally, the interior of the reducer is surrounded by two housings of the reducer after being assembled. Therefore, a space for accommodating the power take-off shaft 1 can be arranged inside the reducer by arranging a chamber for accommodating the power take-off shaft 1 on the reducer housing 6.

[0030] The power take-off shaft 1 is rotatably connected to the reducer housing 6, a transmission gear 4 is provided on the power take-off shaft 1, and the transmission gear 4 is used for transmission connection with the gear of the reducer, and a first transmission connection structure 11 is provided on the end of the power take-off shaft 1 away from the transmission gear 4, and the axial direction of the power take-off shaft 1 is parallel to the axial direction of the reducer input shaft;

[0031] The transmission gear of the power take-off shaft 1 forms a transmission connection with the gear of the reducer by meshing with the gear of the reducer, so that when the gear of the reducer rotates, the transmission gear 4 can be driven to rotate, thereby driving the power take-off shaft 1 to rotate. In this embodiment, the axial direction of the power take-off shaft 1 is parallel to the axial direction of the reducer input shaft, and the power of the reducer is transmitted to the power take-off shaft 1.

[0032] The power take-off output shaft 2 is arranged inside the reducer. A space for accommodating the power take-off output shaft 2 can be arranged inside the reducer. Generally, the interior of the reducer is surrounded by two reducer shells assembled together. Therefore, a space for accommodating the power take-off output shaft 2 can be arranged inside the reducer by arranging a chamber for accommodating the output shaft of the power take-off shaft 1 on the reducer shell 6.

[0033] The power take-off output shaft 2 is rotationally connected to the reducer housing 6, the axis of the power take-off output shaft 2 is in the same straight line as the axis of the power take-off shaft 1, the power take-off output shaft 2 is located at the end of the power take-off shaft 1 away from the transmission gear 4, the end of the power take-off output shaft 2 facing the power take-off shaft 1 is provided with a second transmission connection structure 21, and the end of the power take-off output shaft 2 facing away from the power take-off shaft 1 is provided with a third transmission connection structure 22;

[0034] The third transmission connection structure 22 of the power take-off output shaft 2 is used to output power to the outside. The power take-off output shaft 2 and the power take-off shaft 1 of this embodiment are coaxially arranged, which can facilitate the transmission connection member 31 in the switching assembly 3 to form or disconnect the transmission connection between the power take-off output shaft 2 and the power take-off shaft 1 by moving axially.

[0035] The switching assembly 3 includes a driving mechanism and a transmission connection member 31, and the driving mechanism is connected to the transmission connection member 31. The driving assembly is used to drive the transmission connection member 31 to move. The transmission connection member 31 is driven by the driving mechanism to move to a position where the first transmission connection structure and the second transmission connection structure 21 are transmission-connected, or a position where the transmission connection between the first transmission connection structure and the second transmission connection structure 21 is disconnected.

[0036] like Figure 2 As shown, when the first transmission connection structure and the second transmission connection structure 21 are in the state of disconnecting the transmission connection, the power take-off output shaft 2 will not rotate together with the power take-off shaft 1, and the power take-off is in a neutral state at this time.

[0037] like Figure 3 As shown, when the first transmission connection structure and the second transmission connection structure 21 form a transmission connection, the power take-off output shaft 2 can rotate together with the power take-off shaft 1, thereby transmitting the power of the power take-off shaft 1 to the power take-off output shaft 2, and the power take-off output shaft 2 then outputs the power to the external device connected thereto. At this time, the power take-off is in a gear state.

[0038] Since the power take-off output shaft 2 and the power take-off shaft 1 are both arranged inside the reducer in this embodiment, the lubricating oil inside the reducer can be used to lubricate the power take-off, and the lubricating oil inside the reducer can flow to the transmission gear 4 and the positions of various bearings, so that the power take-off is fully lubricated. The rotation speed of the power take-off can be increased when it is well lubricated. Since the axial direction of the power take-off shaft 1 is arranged parallel to the axial direction of the reducer input shaft in this embodiment, and the power take-off output shaft 2 and the power take-off shaft 1 are arranged coaxially, the transmission connector 31 in the switching assembly 3 only needs to make a simple linear motion in the axial direction to realize the switching of the power take-off between gear and neutral gear, so the power take-off of this embodiment has a simple structure and low cost.

[0039] In this embodiment, the driving mechanism includes a driving member 32 and a toggle member 33, and the driving member 32 is connected to the toggle member 33. The driving member 32 is used to drive the toggle member 33 to move so as to drive the transmission connection member 31 to move to a position where the first transmission connection structure and the second transmission connection structure 21 are transmission connected, or to a position where the transmission connection between the first transmission connection structure and the second transmission connection structure 21 is disconnected.

[0040] In this embodiment, the driving mechanism is configured as a combination of a driving member 32 and a toggle member 33. The driving member 32 moves after receiving input from a power source, and the movement of the driving member 32 drives the toggle member 33 to move, and the toggle member 33 moves by toggling the transmission connecting member 31. In this way, the driving part and the toggle part of the driving structure can be designed and manufactured separately, which reduces the design difficulty and manufacturing cost.

[0041] In this embodiment, the first connecting structure is an external spline, the second connecting structure is an external spline, and the transmission connection 31 is a gear sleeve. When the gear sleeve moves to a position connected to both the second connecting structure and the first connecting structure, the first transmission connection structure 11 and the second transmission connection structure 21 form a transmission connection. When the gear sleeve moves to at least one unconnected position connected to both the second connecting structure and the first connecting structure, the transmission connection formed by the first transmission connection structure 11 and the second transmission connection structure 21 is disconnected.

[0042] like Figure 2 and Figure 3 As shown, the inner wall of the gear sleeve matches the outer walls of the two external splines, so that the gear sleeve and the external splines can be nested with each other, thereby providing a stable and reliable transmission connection. When the gear sleeve moves to a position connected to both the second connection structure and the first connection structure, the first connection structure drives the gear sleeve to rotate, and the gear sleeve drives the second connection structure to rotate, thereby realizing the transmission connection between the first transmission connection structure 11 and the second transmission connection structure 21.

[0043] When the gear sleeve moves to connect with only one of the first connection structure and the second connection structure and disengages from the other, the second connection structure will not rotate with the first connection structure, so the transmission connection between the first transmission connection structure 11 and the second transmission connection structure 21 is in a disconnected state.

[0044] When the transmission connection between the first transmission connection structure 11 and the second transmission connection structure 21 is in a disconnected state, the gear sleeve may still be in a mating state with the external spline of one of the connection structures. This allows the gear sleeve to accurately move along the axial direction under the constraint of the external spline during subsequent movement, thereby ensuring the reliability of the gear sleeve movement to achieve gear shifting and neutral gear switching.

[0045] like Figure 1 As shown, in this embodiment, the outer diameter of the outer spline of the first connecting structure is different from the outer diameter of the outer spline of the second connecting structure. After adopting the above structure, the outer diameters of the two outer splines are one large and one small, so that when the power connection of the two connecting structures needs to be disconnected, the gear sleeve can smoothly move from the spline with a larger outer diameter to the spline with a smaller outer diameter, so that the transmission connection can be disconnected in time and reliably.

[0046] like Figure 1As shown, in the present embodiment, the driving mechanism further includes a return spring 35, one end of the return spring 35 abuts against the reducer housing 6, and the other end opposite thereto abuts against the toggle member 33, and a driving source input end 321 is provided at the end of the driving member 32 away from the return spring 35, and the driving source input end 321 is used to receive the force input by the driving source to compress the return spring 35, when the return spring 35 is compressed, the driving member 32 drives the transmission connection member 31 to move to a position where the first transmission connection structure and the second transmission connection structure 21 are transmission-connected, and when the return spring 35 is reset, the driving member 32 moves with the return spring 35, and drives the transmission connection member 31 to move to a position where the transmission connection between the first transmission connection structure and the second transmission connection structure 21 is disconnected.

[0047] When a force is applied to the input end 321 of the driving source to compress the reset spring 35, the driving member 32 begins to move under the action of the force and drives the toggle member 33 to move, thereby driving the transmission connection member 31 to move the toggle member 33 until the transmission connection member 31 moves to the position where the two transmission connection structures form a transmission connection. When the external force at the input end 321 of the driving source is withdrawn, the reset spring 35 recovers its deformation. In the process of recovering its deformation, the reset spring 35 moves the toggle member 33. Since the toggle member 33 is connected to the driving member 32, the driving member 32 also moves together. Driven by the toggle member 33, the transmission connection member 31 moves to the position where the two connection structures are disconnected. The driving member 32 moves in a direction parallel to the axial direction of the output shaft 2 of the power take-off under the drive of the power source. Specifically, the driving member 32 can be set to a rod shape, and the reducer housing 6 is provided with a hole structure matching the shape of the outer wall of the driving member 32, and the axis of the inner wall of the hole structure is parallel to the axial direction of the power take-off output shaft 2. In this way, under the constraint of the hole structure, the driving member 32 can move in a direction parallel to the axial direction of the power take-off output shaft 2.

[0048] The above-mentioned method can realize the fast and accurate switching of the transmission connection member 31 between the position of forming the transmission connection and the position of disconnecting the transmission connection by using a simple driving structure.

[0049] like Figure 4 As shown, in this embodiment, the driving source is a fluid pressure source, wherein the fluid pressure source includes but is not limited to a gas pressure source or a liquid pressure source. In order to facilitate the fluid pressure source to push the driving member 32 to move, a first chamber 5 can be provided on the reducer housing 6, so that the driving source input end 321 is located in the first chamber 5. When a fluid with a certain pressure is introduced into the first chamber 5 from the outside of the reducer housing 6, the fluid can push the driving member 32 to move.

[0050] A frustum-shaped flange 322 is provided between the driving source input end 321 of the driving member 32 and the position where the driving member 32 is connected to the toggle member 33. The side of the flange 322 facing the driving source input end 321 is a plane 3222, and the side of the flange 322 facing away from the driving source input end 321 is an inclined surface 3221. A seal 34 is provided on the side of the plane 3222 facing the driving source input end 321, and the driving source input end 321 is provided with a blind hole 323 recessed in the compression direction of the return spring 35. In this embodiment, the seal 34 is provided on one side of the plane 3222 of the flange 322, so that the seal 34 and the plane 3222 are tightly attached to form a seal, so as to prevent the lubricating oil in the reducer from leaking from the driving source input end 321 to the outside of the reducer housing 6. The blind hole 323 of the driving source input end 321 can allow a portion of the fluid to enter when the space of the first chamber 5 is small at the initial stage of the movement of the input end, thereby pushing the driving member 32 to move to a position where the space of the first chamber 5 increases, so that more fluid can enter the first chamber 5 to push the driving member 32 to move. In specific implementation, the first chamber 5 is embedded in the reducer housing 6, so that the first chamber 5 is a certain distance away from the outer wall of the reducer housing 6, and a small hole 52 connecting the outer wall of the reducer housing 6 and the first chamber 5 is provided between the outer wall of the reducer housing 6 and the first chamber 5, so that when the driving source input end 321 abuts against the bottom wall 51 of the first chamber 5, the fluid can enter the blind hole 323 through the small hole 52 to push the driving member 32 to move.

[0051] In this embodiment, at least a portion of the gear sleeve is sleeved on the external spline of the power take-off output shaft 2, and a groove 331 is provided on the outer wall of the gear sleeve, which is recessed toward the inner side of the gear sleeve, and one end of the toggle member 33 is inserted into the groove 331. Since one end of the toggle member 33 is inserted into the groove 331 of the gear sleeve, the movement of the toggle member 33 can accurately and reliably drive the gear sleeve to move. At least a portion of the gear sleeve is sleeved on the external spline of the power take-off output shaft 2, and the gear sleeve moves along the axial direction of the power take-off output shaft 2 under the constraint of the external spline.

[0052] In this embodiment, the third transmission connection structure 22 is an internal spline, and a first bearing shoulder 23 and a second bearing shoulder 24 are provided on the power take-off output shaft 2. The first bearing shoulder 23 and the second bearing shoulder 24 are located on the side of the power take-off input shaft away from the transmission connection member 31, and the internal spline extends from the end face of the drive source input end 321 toward the direction close to the transmission connection member 31 to a position between the first bearing shoulder 23 and the second bearing shoulder 24.

[0053] After adopting the above structure, the external device can insert the shaft matching the internal spline into the internal spline to achieve power take-off. Since the transmission connection part of the above structure is located in the reducer, the structure is simple, occupies less space, is not easily disturbed by the external environment, and can be fully lubricated, so that the transmission is more reliable. In this embodiment, the first bearing and the second bearing are arranged at the first bearing shoulder 23 and the second bearing shoulder 24, so as to form a rotational connection between the power take-off output shaft 2 and the reducer housing 6. Since the internal spline extends from the end face of the drive source input end 321 toward the direction close to the transmission connection 31 to the position between the first bearing shoulder 23 and the second bearing shoulder 24, the transmission connection part can be better supported, so that the transmission is more stable.

[0054] Example 2

[0055] This embodiment provides a speed reducer, which includes the built-in power take-off device described in Embodiment 1.

[0056] Example 3

[0057] This embodiment provides a new energy vehicle, which includes the reducer in Embodiment 2.

[0058] The above is a detailed introduction to the built-in power take-off, reducer and new energy vehicle provided in the embodiments of the utility model.

[0059] The above is only a specific implementation of the present invention. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present invention is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention.

Claims

1. Built-in power take-off, characterized in that: include: A power take-off shaft is arranged inside the reducer, the power take-off shaft is rotatably connected to the reducer housing, a transmission gear is arranged on the power take-off shaft, the transmission gear is used for transmission connection with the gear of the reducer, a first transmission connection structure is arranged on one end of the power take-off shaft away from the transmission gear, and the axial direction of the power take-off shaft is parallel to the axial direction of the reducer input shaft; A power take-off output shaft is arranged inside the reducer, the power take-off output shaft is rotatably connected to the reducer housing, the axis of the power take-off output shaft is in the same straight line as the axis of the power take-off shaft, the power take-off output shaft is located at the end of the power take-off shaft away from the transmission gear, the end of the power take-off output shaft facing the power take-off shaft is provided with a second transmission connection structure, and the end of the power take-off output shaft facing away from the power take-off shaft is provided with a third transmission connection structure; The switching assembly includes a driving mechanism and a transmission connecting member, wherein the driving mechanism is connected to the transmission connecting member, and the transmission connecting member is driven by the driving mechanism to move to a position where the first transmission connecting structure and the second transmission connecting structure are transmission connected, or to a position where the transmission connection between the first transmission connecting structure and the second transmission connecting structure is disconnected.

2. The built-in power take-off according to claim 1, characterized in that: The driving mechanism includes a driving member and a toggle member, wherein the driving member is connected to the toggle member, and the driving member is used to drive the toggle member to move so as to drive the transmission connection member to move to a position where the first transmission connection structure and the second transmission connection structure are transmission connected, or to a position where the transmission connection between the first transmission connection structure and the second transmission connection structure is disconnected.

3. The built-in power take-off according to claim 2, characterized in that: The first transmission connection structure is an external spline, the second transmission connection structure is an external spline, and the transmission connection piece is a gear sleeve. When the gear sleeve moves to a position connected to both the second transmission connection structure and the first transmission connection structure, the first transmission connection structure and the second transmission connection structure form a transmission connection. When the gear sleeve moves to at least one unconnected position connected to both the second transmission connection structure and the first transmission connection structure, the transmission connection formed by the first transmission connection structure and the second transmission connection structure is disconnected.

4. The built-in power take-off according to claim 3, characterized in that: The outer diameter of the external spline of the first transmission connection structure is different from the outer diameter of the external spline of the second transmission connection structure.

5. The built-in power take-off according to claim 2, characterized in that: The driving mechanism also includes a return spring, one end of which is in contact with the reducer housing, and the other end of which is in contact with the toggle member. A driving source input end is provided at the end of the driving member away from the return spring, and the driving source input end is used to receive the force input by the driving source to compress the return spring. When the return spring is compressed, the driving member drives the transmission connection member to move to a position where the first transmission connection structure and the second transmission connection structure are transmission-connected. When the return spring is reset, the driving member moves with the return spring and drives the transmission connection member to move to a position where the transmission connection between the first transmission connection structure and the second transmission connection structure is disconnected.

6. The built-in power take-off according to claim 5, characterized in that: The driving source is a fluid pressure source, and a frustum-shaped flange is arranged between the driving source input end of the driving member and the position where the driving member is connected to the toggle member. The side of the flange facing the driving source input end is a plane, and the side of the flange facing away from the driving source input end is an inclined surface. A sealing member is arranged on the side of the plane facing the driving source input end, and the driving source input end is provided with a blind hole recessed in the compression direction of the return spring.

7. The built-in power take-off according to claim 3, characterized in that: At least a portion of the gear sleeve is sleeved on the external spline of the power take-off output shaft, and a groove recessed toward the inner side of the gear sleeve is provided on the outer wall of the gear sleeve, and one end of the toggle member is inserted into the groove.

8. The built-in power take-off according to any one of claims 1 to 7, characterized in that: The third transmission connection structure is an internal spline, and a first bearing shoulder and a second bearing shoulder are provided on the power take-off output shaft. The first bearing shoulder and the second bearing shoulder are located on the side of the power take-off input shaft away from the transmission connection member, and the internal spline extends from the end face of the drive source input end toward the direction close to the transmission connection member to a position between the first bearing shoulder and the second bearing shoulder.

9. A reducer, characterized in that: The invention comprises a built-in power take-off as claimed in any one of claims 1 to 8.

10. New energy vehicles, characterized in that: Includes the reducer as described in claim 9.

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