Transfer case for vehicle and vehicle

Abstract

The present disclosure provides a transfer case for a vehicle and a vehicle, wherein the transfer case includes a transfer case housing, a chain sprocket mechanism and a gear switching and locking mechanism, wherein the gear switching and locking mechanism is configured to enable the vehicle to switch between a first mode and a second mode, wherein the mechanism includes a gear sleeve, which is coaxially sleeved on the outside of one end of a rear output shaft and connected to the rear output shaft by a spline, wherein the gear sleeve is configured to be movable between a first position and a second position in an axial direction, wherein a first engaging tooth is provided at the first end of the gear sleeve and a second engaging tooth is provided at the second end of the gear sleeve, wherein in the first position, the first engaging tooth of the gear sleeve is engaged with the engaging tooth provided on the input shaft and the second engaging tooth of the gear sleeve is separated from the chain sprocket mechanism, and in the second position, the first engaging tooth of the gear sleeve is engaged with the planet carrier and the second engaging tooth of the gear sleeve is engaged with the chain sprocket mechanism. The present disclosure is simple in layout, safe and reliable, convenient in operation and highly economical.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicle transmission structure, and more particularly to a transfer case for a vehicle and a vehicle including the transfer case. Background Art

[0002] With the improvement of living standards and the strengthening of environmental awareness, vehicles are no longer simply a means of transportation, but an important part of people's pursuit of a better life. Consumers also have higher requirements for the power and economy of vehicles.

[0003] The function of the transfer case used in vehicles is to distribute the power output by the transmission to each drive axle, and realize the driving state conversion between two-wheel drive and four-wheel drive through the internal shift mechanism, thereby improving the vehicle's passing performance and handling performance. Compared with traditional two-wheel drive vehicles, four-wheel drive vehicles have better handling performance, stronger escape performance and richer driving experience, and are increasingly sought after by consumers. Compared with ordinary transfer cases, off-road transfer cases can provide more gear options in strong off-road conditions such as ice, snow, and sand, and have stronger escape ability and stable handling.

[0004] The current transfer cases used in vehicles can be classified into part-time four-wheel drive, timely four-wheel drive and full-time four-wheel drive, and can also be classified into fixed torque distribution and variable torque distribution according to the different drive torque distribution methods. The performance of vehicle transfer cases is comprehensively evaluated from aspects such as system responsiveness, durability, comfort and matching and integration of later electronic systems, with intelligence and lightweight as the main development direction, while taking into account the strong off-road development of the domestic niche market.

[0005] The actuator of the transfer case used in vehicles has a great impact on the speed and accuracy of torque transmission. It also affects the service life of the clutch, the vibration and impact of the transmission system, the handling stability of the vehicle, etc. The noise generated by various loads such as impact and vibration during the gear shifting process will eventually be transmitted to the car through the housing and air medium, resulting in a decrease in riding comfort. Summary of the invention

[0006] In view of this, an embodiment of the present disclosure provides a transfer case for a vehicle and a vehicle to solve the problems existing in the prior art.

[0007] In one aspect of an embodiment of the present disclosure, an embodiment of the present disclosure provides a transfer case for a vehicle, the transfer case comprising: a transfer case housing, the transfer case housing being configured to support an input shaft, a rear output shaft and a front output shaft of the vehicle, wherein the input shaft is coaxially connected to the rear output shaft, wherein engaging teeth and a sun gear are coaxially arranged on the input shaft, and a planet carrier cooperating with the sun gear is coaxially arranged on the outside of the sun gear; a chain sprocket mechanism, the chain sprocket mechanism being configured to connect the front output shaft and the rear output shaft; and a gear switching and locking mechanism, the gear switching and locking mechanism being configured to enable the vehicle to switch between a first mode and a second mode, wherein the gear switching and locking mechanism comprises a gear sleeve, the gear sleeve being coaxially sleeved on the outside of an end of the rear output shaft adjacent to the input shaft and being connected to the rear output shaft via a spline arranged in the gear sleeve. The rear output shaft, the gear sleeve is configured to be movable in an axial direction between a first position corresponding to the first mode and a second position corresponding to the second mode, and wherein a first engaging tooth is provided at a first end of the gear sleeve and a second engaging tooth is provided at a second end of the gear sleeve opposite to the first end in the axial direction, wherein, in the first position, the first engaging tooth of the gear sleeve engages with the engaging tooth provided on the input shaft and the second engaging tooth of the gear sleeve is separated from the chain sprocket mechanism, so that the power from the input shaft is transmitted to the rear output shaft via the gear sleeve; and wherein, in the second position, the first engaging tooth of the gear sleeve engages with the planetary carrier and the second engaging tooth of the gear sleeve engages with the chain sprocket mechanism, so that the power from the input shaft is transmitted to the rear output shaft and the front output shaft respectively via the gear sleeve.

[0008] In some embodiments, the gear shift and locking mechanism further includes an actuation mechanism configured to actuate movement of the gear sleeve between the first position and the second position.

[0009] In some embodiments, the actuating mechanism includes: a shift fork plate, which is fixedly disposed on the gear sleeve; a shift fork that cooperates with the shift fork plate, which is sleeved on the shift guide shaft of the vehicle and is configured to be movable along the shift guide shaft to drive the movement of the gear sleeve; a coil housing, which is fixedly mounted on the shift guide shaft; an electromagnetic coil, which is disposed in the coil housing; and a shift spring, which is sleeved on the shift guide shaft and connected between the shift fork and the coil housing.

[0010] In some embodiments, an extension axis of the shift guide shaft is parallel to extension axes of the rear output shaft and the front output shaft, and the shift guide shaft is disposed between the rear output shaft and the front output shaft.

[0011] In some embodiments, the electromagnetic coil is electrically connected to the circuit of the vehicle and is turned on and off by a switch.

[0012] In some embodiments, when the electromagnetic coil is turned on, the shift fork moves close to the coil housing and drives the gear sleeve to move to the second position under the action of the electromagnetic force generated by the electromagnetic field of the electromagnetic coil, wherein the shift spring is compressed; and when the electromagnetic coil is turned off, the shift fork moves away from the coil housing and drives the gear sleeve to move to the first position under the action of the restoring force of the shift spring.

[0013] In some embodiments, the chain sprocket mechanism includes: a driving sprocket, which is sleeved on the rear output shaft and connected to the rear output shaft through a needle bearing; a driven sprocket, which is sleeved on the front output shaft and connected to the front output shaft through a spline; and a chain, which connects the driving sprocket and the driven sprocket.

[0014] In some embodiments, the gear switching and locking mechanism further includes at least one return spring, and the return spring is connected between the second end of the gear sleeve and the driving sprocket.

[0015] In some embodiments, a third engaging tooth is disposed on the driving sprocket, and the third engaging tooth is configured to engage with the second engaging tooth of the gear sleeve.

[0016] In another aspect of the embodiments of the present disclosure, an embodiment of the present disclosure provides a vehicle, comprising an input shaft, a rear output shaft and a front output shaft, wherein the vehicle further comprises a transfer case of the aforementioned aspect.

[0017] The disclosed embodiment integrates the gear shifting mechanism and the mechanical lock into one through the gear switching and locking mechanism, and performs mechanical locking simultaneously when engaging the low-speed gear, making the gear switching more convenient and the locking more reliable on severe off-road roads (steep slopes and ice, snow, mud, and sand), thereby improving the safety and stability of the vehicle in extreme road conditions, and has the characteristics of simple layout, safety and reliability, easy operation, and strong economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 is a schematic diagram showing a transfer case for a vehicle according to an embodiment of the present disclosure, wherein the gear shift and locking mechanism is in a first position;

[0020] Figure 2 is a schematic diagram showing a transfer case for a vehicle according to an embodiment of the present disclosure, wherein the gear shift and locking mechanism is in a second position;

[0021] Figure 3 is a flowchart showing a switching process when switching the vehicle from the first mode to the second mode; and

[0022] Figure 4 is a flowchart showing a switching process when switching the vehicle from the second mode to the first mode.

[0023] The reference numerals are as follows:

[0024] 1-transfer case housing; 11-front housing; 12-rear housing; 2-chain sprocket mechanism; 21-driving sprocket; 211-third engaging tooth; 22-driven sprocket; 23-chain; 3-gear shifting and locking mechanism 31-tooth sleeve; 311-first engaging tooth; 312-second engaging tooth; 32-actuating mechanism; 321-fork plate 322-fork; 323-coil housing; 324-electromagnetic coil; 325-shift spring; 33-return spring; A-input shaft; A1-engaging tooth; A2-sun gear; A3-planet carrier; B-rear output shaft; B1-spline; C-front output shaft; D-shift guide shaft. DETAILED DESCRIPTION

[0025] Various aspects and features of the present disclosure are described herein with reference to the drawings.

[0026] It should be understood that various modifications may be made to the embodiments of the present application. Therefore, the above description should not be considered as limiting, but only as an example of an embodiment. Other modifications within the scope and spirit of the present disclosure will occur to those skilled in the art.

[0027] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the general description of the present disclosure given above and the detailed description of the embodiments given below, serve to explain the principles of the present disclosure.

[0028] These and other characteristics of the present disclosure will become apparent from the following description of a preferred form of embodiment given as a non-limiting example, with reference to the attached drawings.

[0029] It should also be understood that, although the present disclosure has been described with reference to some specific examples, those skilled in the art will be able to realize many other equivalent forms of the present disclosure that have the features described in the claims and are therefore within the scope of protection defined thereby.

[0030] The above and other aspects, features and advantages of the present disclosure will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

[0031] Specific embodiments of the present disclosure are described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments claimed are merely examples of the present disclosure, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to avoid obscuring the present disclosure with unnecessary or redundant details. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely serve as a basis and representative basis for the claims to teach those skilled in the art to use the present disclosure in a variety of ways with substantially any suitable detailed structure.

[0032] This specification may use the phrases "in one embodiment," "in another embodiment," "in a further embodiment," or "in other embodiments," all of which may refer to one or more of the same or different embodiments according to the present disclosure.

[0033] refer to Figure 1 and Figure 2 As shown, the first embodiment of the disclosed embodiment proposes a transfer case for a vehicle. In general, the transfer case includes a transfer case housing 1, a chain sprocket mechanism 2, and a gear switching and locking mechanism 3. The transfer case housing 1 is configured to support the input shaft A, the rear output shaft B, and the front output shaft C of the vehicle. The input shaft A is coaxially connected to the rear output shaft B. Coaxially arranged on the input shaft A are engaging teeth A1 and a sun gear A2, and coaxially arranged on the outside of the sun gear A2 is a planet carrier A3 that cooperates with the sun gear A2. The chain sprocket mechanism 2 is configured to connect the front output shaft C and the rear output shaft B. The gear switching and locking mechanism 3 is configured to enable the vehicle to switch between a first mode (i.e., 2H mode) and a second mode (i.e., 4L mode).

[0034] The gear shift and locking mechanism 3 may include a gear sleeve 31. The gear sleeve 31 is coaxially sleeved on the outside of one end of the rear output shaft B adjacent to the input shaft A and is connected to the rear output shaft B via a spline B1 provided in the gear sleeve 31. The gear sleeve 31 is configured to be movable in the axial direction between a first position corresponding to the first mode and a second position corresponding to the second mode. A first engaging tooth 311 is provided at a first end of the gear sleeve 31 and a second engaging tooth 312 is provided at a second end of the gear sleeve 31 opposite to the first end in the axial direction.

[0035] like Figure 1As shown, in the first position, the first engaging teeth 311 of the gear sleeve 31 engage with the engaging teeth A1 provided on the input shaft A and the second engaging teeth 312 of the gear sleeve 31 are separated from the chain sprocket mechanism 2, so that the power from the input shaft A is transmitted to the rear output shaft B via the gear sleeve 31. Figure 2 As shown, in the second position, the first engaging teeth 311 of the gear sleeve 31 engage with the planetary carrier A3 and the second engaging teeth 312 of the gear sleeve 31 engage with the chain sprocket mechanism 2, so that the power from the input shaft A is transmitted to the rear output shaft B and the front output shaft C respectively via the gear sleeve 31.

[0036] In particular, if Figure 1 and Figure 2 As shown, the gear switching and locking mechanism 3 also includes an actuating mechanism 32 configured to actuate the movement of the gear sleeve 31 between the first position and the second position. In general, the actuating mechanism 32 may include a shift fork plate 321, a shift fork 322, a coil housing 323, an electromagnetic coil 324, and a shift spring 325. The shift fork plate 321 may be fixedly disposed on the gear sleeve 31 so as to be able to move in the axial direction along with the gear sleeve 31. The shift fork 322 is sleeved on the shift guide shaft D of the vehicle and is configured to cooperate with the shift fork plate 321, and the shift fork 322 is configured to be able to move along the shift guide shaft D, thereby driving the movement of the gear sleeve 31 in the axial direction via the shift fork plate 321. The coil housing 323 may be fixedly mounted on the shift guide shaft D, an electromagnetic coil 324 may be disposed in the coil housing 323, and the shift spring 325 may be sleeved on the shift guide shaft D and connected between the shift fork 322 and the coil housing 323. With such an arrangement, the working mode of the transfer case can be switched by connecting and disconnecting the electromagnetic coil 324 according to actual driving needs.

[0037] In particular, if Figure 1 and Figure 2 As shown, the extension axis of the shift guide shaft D can be parallel to the extension axes of the rear output shaft B and the front output shaft C, and the shift guide shaft D is arranged between the rear output shaft B and the front output shaft C.

[0038] In particular, the electromagnetic coil 324 can be electrically connected to the circuit of the vehicle and the electromagnetic coil 324 can be turned on and off by a switch (such as a switch provided inside the vehicle cab). When the electromagnetic coil 324 is turned on, the shift fork 322 moves close to the coil housing 323 under the action of the electromagnetic force generated by the electromagnetic field of the electromagnetic coil 324 and drives the gear sleeve 31 to move to the second position, wherein the shift spring 325 is compressed. When the electromagnetic coil 324 is turned off, the shift fork 322 moves away from the coil housing 323 under the action of the restoring force of the shift spring 325 and drives the gear sleeve 31 to move to the first position.

[0039] The disclosed embodiment highlights the off-road function of the vehicle on extreme roads. The axial movement of the electromagnetically controlled shift fork drives the axial movement of the shift fork plate 321 and the gear sleeve 31 to complete the switching between the first mode (i.e., 2H mode) and the second mode (i.e., 4L mode). It has the characteristics of small impact and fast shifting, meets the off-road requirements on extreme roads, and makes the operation of the transfer case more convenient, the operation more reliable, and the application range more extensive.

[0040] In particular, if Figure 1 and Figure 2 As shown, the chain sprocket mechanism 2 may include a driving sprocket 21, a driven sprocket 22, and a chain 23. The driving sprocket 21 may be sleeved on the rear output shaft B and connected to the rear output shaft B through a needle bearing 4. The driven sprocket 22 may be sleeved on the front output shaft C and connected to the front output shaft C through a spline. The chain 23 may connect the driving sprocket 21 and the driven sprocket 22. With such a chain sprocket mechanism 2, the front output shaft C and the rear output shaft B can be connected.

[0041] In particular, if Figure 1 and Figure 2 As shown, the gear switching and locking mechanism 3 may further include at least one return spring 33 , and the return spring 33 is connected between the second end of the gear sleeve 31 and the driving sprocket 21 .

[0042] In particular, if Figure 1 and Figure 2 As shown, the driving sprocket 21 may be provided with a third engaging tooth 211 , and the third engaging tooth 211 is configured to engage with the second engaging tooth 312 of the gear sleeve 31 .

[0043] Another aspect of the present application provides a vehicle, which includes an input shaft A, a rear output shaft B and a front output shaft C, and the vehicle also includes the transfer case of the aforementioned aspect.

[0044] The following will refer to Figure 3 and Figure 4 Detailed description in Figure 1 The first mode shown is Figure 2 The switching process between the second modes is shown.

[0045] When the driver switches the vehicle from the first mode (i.e., 2H mode) to the second mode (i.e., 4L mode) by shifting gears, the driver gives a shifting command (step S11), the electromagnetic coil 324 is connected to current so that an electromagnetic field is generated around the coil housing 323 and an electromagnetic force is generated under the action of the electromagnetic field (step S12), and the shift fork 322 moves axially along the shift guide shaft D under the action of the electromagnetic force and cooperates with the shift fork plate 321 to drive the gear sleeve 31 to move axially to the right (such as the rear output shaft B) along the rear output shaft B. Figure 1 and Figure 2Then, the first engaging teeth 311 of the gear sleeve 31 mesh with the engaging teeth of the planetary carrier A3 to complete the shifting action, and the second engaging teeth 312 of the gear sleeve 31 mesh with the third engaging teeth 211 of the driving sprocket 21 to complete the padlocking action (step S14), at which time the return spring 33 and the shift spring 325 are both compressed.

[0046] When the driver switches the vehicle from the second mode (i.e., 4L mode) to the first mode (i.e., 2H mode) by shifting gears, the driver gives a shifting operation command (step S21), the electromagnetic coil 324 disconnects the current so that the electromagnetic field generated around the coil housing 323 disappears and the electromagnetic force under the action of the electromagnetic field disappears (step S22), and the shift fork 322 moves axially along the shift guide shaft D under the action of the restoring force of the shift spring 325 and cooperates with the shift fork plate 321 to drive the gear sleeve 31 to move axially to the left (such as the left side) along the rear output shaft 13. Figure 1 and Figure 2 Then, the first engaging teeth 311 of the gear sleeve 31 are disengaged from the engaging teeth of the planetary carrier A3, the engaging teeth A1 of the input shaft A are engaged with the first engaging teeth 311 of the gear sleeve 31 to complete the shifting action, the return spring 33 returns, and the second engaging teeth 312 of the gear sleeve 31 are disengaged from the third engaging teeth 211 of the driving sprocket 21 to complete the unlocking action.

[0047] The disclosed embodiment integrates the gear shifting mechanism and the mechanical lock into one through the gear switching and locking mechanism, and performs mechanical locking simultaneously when engaging the low-speed gear, making the gear switching more convenient and the locking more reliable on severe off-road roads (steep slopes and ice, snow, mud, and sand), thereby improving the safety and stability of the vehicle in extreme road conditions, and has the characteristics of simple layout, safety and reliability, easy operation, and strong economy.

[0048] A second embodiment of the present disclosure provides a vehicle, comprising an input shaft, a rear output shaft and a front output shaft, wherein the vehicle further comprises a transfer case of the aforementioned aspect.

[0049] The purpose of the disclosed embodiment is to provide a gear shifting and locking mechanism for a transfer case of a vehicle in view of the high frequency of use of the 4L mode on severe off-road surfaces, so as to integrate the gear shifting mechanism and the mechanical lock into one, and to perform mechanical locking simultaneously when engaging a low-speed gear, thereby making gear switching more convenient and locking more reliable on severe off-road surfaces (steep slopes and ice, snow, mud, and sand), thereby improving the safety and stability of the vehicle in extreme road conditions, and having the characteristics of simple layout, safety and reliability, easy operation, and strong economy.

[0050] Those skilled in the art should understand that the scope of disclosure involved in the present disclosure is not limited to the technical solutions formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above disclosed concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present disclosure.

[0051] In addition, although each operation is described in a specific order, this should not be understood as requiring these operations to be performed in the specific order shown or in a sequential order. Under certain circumstances, multitasking and parallel processing may be advantageous. Similarly, although some specific implementation details are included in the above discussion, these should not be interpreted as limiting the scope of the present disclosure. Some features described in the context of a separate embodiment can also be implemented in a single embodiment in combination. On the contrary, the various features described in the context of a single embodiment can also be implemented in multiple embodiments individually or in any suitable sub-combination mode.

[0052] Although the subject matter has been described in language specific to structural features and / or methodological logical actions, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. On the contrary, the specific features and actions described above are merely example forms of implementing the claims.

[0053] Multiple embodiments of the present disclosure are described in detail above, but the present disclosure is not limited to these specific embodiments. Those skilled in the art can make various variations and modifications to the embodiments based on the concepts of the present disclosure, and these variations and modifications should all fall within the scope of protection required by the present disclosure.

Claims

1. A transfer case for a vehicle, characterized in that: The transfer case comprises: a transfer case housing configured to support an input shaft, a rear output shaft, and a front output shaft of the vehicle, wherein the input shaft is coaxially connected to the rear output shaft, wherein a coupling tooth and a sun gear are coaxially disposed on the input shaft, and a planet carrier cooperating with the sun gear is coaxially disposed outside the sun gear; a chain sprocket mechanism configured to connect the front output shaft and the rear output shaft, and a gear shift and locking mechanism, the gear shift and locking mechanism being configured to enable the vehicle to switch between a first mode and a second mode, wherein the gear shift and locking mechanism comprises a gear sleeve, the gear sleeve being coaxially sleeved on the outside of an end of the rear output shaft adjacent to the input shaft and connected to the rear output shaft via a spline provided in the gear sleeve, the gear sleeve being configured to be movable in an axial direction between a first position corresponding to the first mode and a second position corresponding to the second mode, and wherein a first engaging tooth is provided at a first end of the gear sleeve and a second engaging tooth is provided at a second end of the gear sleeve opposite to the first end in the axial direction; Wherein, in the first position, the first engaging teeth of the gear sleeve are engaged with the engaging teeth arranged on the input shaft and the second engaging teeth of the gear sleeve are separated from the chain sprocket mechanism, so that the power from the input shaft is transmitted to the rear output shaft via the gear sleeve; in the second position, the first engaging teeth of the gear sleeve are engaged with the planetary carrier and the second engaging teeth of the gear sleeve are engaged with the chain sprocket mechanism, so that the power from the input shaft is transmitted to the rear output shaft and the front output shaft respectively via the gear sleeve.

2. The transfer case according to claim 1, characterized in that: The gear shift and locking mechanism further includes an actuation mechanism configured to actuate movement of the gear sleeve between the first position and the second position.

3. The transfer case according to claim 2, characterized in that: The actuating mechanism comprises: A shift fork plate, wherein the shift fork plate is fixedly arranged on the gear sleeve; A shift fork matched with the shift fork plate, the shift fork being sleeved on the shift guide shaft of the vehicle and being configured to be movable along the shift guide shaft to drive the movement of the gear sleeve; A coil housing, wherein the coil housing is fixedly mounted on the shift guide shaft; an electromagnetic coil disposed in the coil housing; and A shift spring is sleeved on the shift guide shaft and connected between the shift fork and the coil housing.

4. The transfer case according to claim 3, characterized in that: An extension axis of the shift guide shaft is parallel to extension axes of the rear output shaft and the front output shaft, and the shift guide shaft is disposed between the rear output shaft and the front output shaft.

5. The transfer case according to claim 3, characterized in that: The electromagnetic coil is electrically connected to an electric circuit of the vehicle and is turned on and off by a switch.

6. The transfer case according to claim 5, characterized in that: When the electromagnetic coil is turned on, the shift fork moves close to the coil housing and drives the gear sleeve to the second position under the action of the electromagnetic force generated by the electromagnetic field of the electromagnetic coil, wherein the shift spring is compressed; and when the electromagnetic coil is disconnected, the shift fork moves away from the coil housing and drives the gear sleeve to the first position under the action of the restoring force of the shift spring.

7. The transfer case according to claim 1, characterized in that: The chain sprocket mechanism comprises: A driving sprocket, the driving sprocket is sleeved on the rear output shaft and connected to the rear output shaft through a needle bearing; A driven sprocket, the driven sprocket being sleeved on the front output shaft and connected to the front output shaft via a spline; and A chain connects the driving sprocket and the driven sprocket.

8. The transfer case according to claim 7, characterized in that: The gear switching and locking mechanism further includes at least one return spring, and the return spring is connected between the second end of the gear sleeve and the driving sprocket.

9. The transfer case according to claim 7, characterized in that: The driving sprocket is provided with a third engaging tooth, and the third engaging tooth is configured to be engageable with the second engaging tooth of the gear sleeve.

10. A vehicle comprising an input shaft, a rear output shaft and a front output shaft, characterized in that: The vehicle further comprises a transfer case according to any one of claims 1 to 9.

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