Disconnecting mechanism of driving shaft, driving shaft assembly and vehicle

Abstract

The utility model discloses a disconnect mechanism of drive shaft, drive shaft assembly and vehicle, drive shaft includes spline housing and spline shaft, spline housing is sleeved outside spline shaft, disconnect mechanism includes: mounting seat, mounting groove is formed in mounting seat; the driving structure is connected with a driving screw rod, and the driving screw rod is rotatably mounted in the mounting groove; and the movable structure is arranged outside the driving screw in a sleeving mode, at least part of the movable structure is in threaded fit with the driving screw, so that when the driving screw rotates, the movable structure moves in the axial direction of the driving screw and pushes the spline sleeve to move in the axial direction relative to the spline shaft, and the movable structure is in guide fit with the inner wall of the mounting groove in the axial direction of the driving screw. According to the disconnecting mechanism of the driving shaft, the problems that a shifting fork cannot be shifted and power cannot be disconnected and combined due to an existing shifting fork structure are solved, the power of an auxiliary drive axle of the whole vehicle can be accurately, stably and rapidly combined or disconnected, the power transmission efficiency is improved, the controllability of the vehicle is enhanced, and the fuel economy is improved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle manufacturing technology, and in particular to a drive shaft disconnection mechanism, a drive shaft assembly having the drive shaft disconnection mechanism, and a vehicle having the drive shaft assembly. Background Technology

[0002] In existing technologies, the auxiliary drive axle power disconnection mechanism mainly uses an electronically controlled shift fork device. An electronically controlled shift fork device is typically an automated device used in vehicles or other mechanical equipment to switch gears or other mechanical components. In the front final drive, the electronically controlled shift fork device usually receives signals from the vehicle's electronic control unit (ECU) and determines whether to change the power transmission method based on driving conditions (such as vehicle speed and road conditions). For example, in some cases, the power distribution to the front axle may be changed to improve fuel economy or vehicle handling performance. However, electronically controlled shift forks suffer from drawbacks such as the inability to disengage and poor reliability, thus failing to effectively interrupt the connection of power to the auxiliary drive axle. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a drive shaft disconnection mechanism, which not only solves the problems of the inability to shift the shift fork and disconnect the power supply caused by the existing shift fork structure, but also enables the auxiliary drive axle power of the whole vehicle to be precisely, stably and quickly engaged or disengaged, thereby improving power transmission efficiency, enhancing vehicle handling, and improving fuel economy.

[0004] According to an embodiment of the present invention, a disconnection mechanism for a drive shaft includes a spline sleeve and a spline shaft, the spline sleeve being sleeved on the outside of the spline shaft. The disconnection mechanism includes: a mounting base having a mounting groove; a drive structure connected to a drive screw, the drive screw being rotatably mounted in the mounting groove; and a movable structure sleeved on the outside of the drive screw and at least partially threaded to the drive screw, so as to move along the axial direction of the drive screw and push the spline sleeve to move axially relative to the spline shaft when the drive screw rotates, and the movable structure is guided to the inner wall of the mounting groove along the axial direction of the drive screw.

[0005] According to the drive shaft disconnection mechanism of this utility model embodiment, the rotational motion of the drive screw is converted into the linear motion of the movable structure, and the driving force is transmitted to the spline sleeve to drive the spline sleeve to move axially relative to the spline shaft, thereby realizing the engagement or disconnection of the spline sleeve and the spline shaft. Thus, the engagement or disconnection of the auxiliary drive axle power of the whole vehicle is realized through the disconnection device, interrupting the power of the wheels, half shafts and rotating components such as the main and driven gears, thereby reducing the energy loss caused by back-mounting. It solves the problem of the inability to move the shift fork and the inability to disconnect or engage the power caused by the existing shift fork structure. At the same time, through the guiding cooperation between the movable structure in the disconnection mechanism and the inner wall of the mounting groove along the axial direction of the drive screw, the power of the auxiliary drive axle of the whole vehicle can be accurately and stably engaged or disconnected quickly, thereby ensuring that the power is quickly transmitted when needed and disconnected in time when not needed, avoiding unnecessary energy loss, improving power transmission efficiency, enhancing vehicle handling, and improving fuel economy.

[0006] According to some embodiments of the present invention, the disconnection mechanism of the drive shaft includes a movable structure comprising a bushing, a slider, and a slider seat sleeved outside the drive screw. The bushing is threadedly engaged with the drive screw. A first elastic element is provided between the side of the slider seat facing away from the bushing and the mounting base. The slider is slidably mounted on the slider seat. A second elastic element is elastically pressed between the side of the slider facing the bushing and the slider seat. The slider is provided with a pushing part for pushing the spline sleeve to move axially relative to the spline shaft. The bushing and the slider seat are respectively guided and engaged with the inner wall of the mounting groove along the axial direction of the drive screw.

[0007] According to some embodiments of the present invention, the drive shaft disconnection mechanism includes a first guide portion on the bushing and a first guide mating portion on the inner wall of the mounting groove, wherein the first guide portion and the first guide mating portion are guided and mated along the axial direction of the drive screw; and / or, the slider seat includes a second guide portion and a second guide mating portion on the inner wall of the mounting groove, wherein the second guide portion and the second guide mating portion are guided and mated along the axial direction of the drive screw.

[0008] According to some embodiments of the present invention, in the drive shaft disconnection mechanism, one of the first guide portion and the first guide mating portion is configured as a first guide rib and the other is configured as a first guide groove, the first guide rib extending into the first guide groove; and / or, one of the second guide portion and the second guide mating portion is configured as a second guide rib and the other is configured as a second guide groove, the second guide rib extending into the second guide groove.

[0009] According to some embodiments of the present invention, the drive shaft disconnection mechanism includes a first guide portion configured as a first guide groove and a second guide portion configured as a second guide groove, wherein the first guide groove and the second guide groove are distributed opposite to each other along the axial direction of the drive screw; wherein the first guide mating portion is configured as a first guide rib and the second guide mating portion is configured as a second guide rib, wherein the first guide rib and the second guide rib are distributed opposite to each other along the axial direction of the drive screw.

[0010] According to some embodiments of the present invention, in the drive shaft disconnection mechanism, the second guide rib is configured as two spaced sub-guide ribs, and the slider seat is provided with a through hole for the push part to pass through, the through hole being located between the two sub-guide ribs; wherein, the first guide rib is directly connected to one of the sub-guide ribs.

[0011] According to some embodiments of the present invention, the drive shaft disconnection mechanism has the first guide portion disposed at the bottom of the bushing, and the first guide mating portion disposed at the inner bottom wall of the mounting groove; and / or, the second guide portion disposed at the bottom of the slider seat, and the second guide mating portion disposed at the inner bottom wall of the mounting groove.

[0012] According to some embodiments of the present invention, the drive shaft disconnection mechanism includes a drive component and a gear set, the gear set being connected to the drive component and the drive screw respectively, and the drive component being adapted to drive the drive screw to rotate through the gear set.

[0013] This utility model also proposes a drive shaft assembly.

[0014] The drive shaft assembly according to an embodiment of the present invention includes a spline shaft, a spline sleeve, and a disconnection mechanism for the drive shaft as described in any of the above embodiments. The spline sleeve is sleeved outside the spline shaft. The pushing part is adapted to push the spline sleeve to move relative to the spline shaft in a first direction to enable circumferential transmission between the spline sleeve and the spline shaft, and is also adapted to push the spline sleeve to move relative to the spline shaft in a second direction to enable circumferential unlocking between the spline sleeve and the spline shaft. The first direction is opposite to the second direction.

[0015] This utility model also proposes a vehicle.

[0016] The vehicle according to an embodiment of the present invention is provided with the drive shaft assembly described in the above embodiment.

[0017] The drive shaft assembly, the vehicle, and the aforementioned drive shaft disconnection mechanism all have the same advantages over the prior art, and will not be repeated here.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is a schematic diagram of the drive shaft assembly according to an embodiment of the present utility model;

[0021] Figure 2 This is a partial structural schematic diagram of the drive shaft assembly according to an embodiment of the present utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the drive shaft disconnection mechanism according to an embodiment of the present utility model. Figure 1 ;

[0023] Figure 4 This is a structural schematic diagram of the spline shaft and spline sleeve according to an embodiment of the present utility model;

[0024] Figure 5 This is a schematic diagram of the structure of the drive shaft disconnection mechanism according to an embodiment of the present utility model. Figure 2 ;

[0025] Figure 6 This is a schematic diagram of the structure of the drive shaft disconnection mechanism according to an embodiment of the present utility model. Figure 3 ;

[0026] Figure 7 This is a schematic diagram of the structure of the bushing according to an embodiment of the present utility model. Figure 1 ;

[0027] Figure 8 This is a schematic diagram of the structure of the bushing according to an embodiment of the present utility model. Figure 2 ;

[0028] Figure 9 This is a schematic diagram of the mounting groove of the bushing according to an embodiment of the present utility model. Figure 1 ;

[0029] Figure 10 This is a schematic diagram of the mounting groove of the bushing according to an embodiment of the present utility model. Figure 2 ;

[0030] Figure 11 This is a schematic diagram of the slider seat according to an embodiment of the present utility model.

[0031] Figure label:

[0032] Drive shaft assembly 1000,

[0033] The drive shaft disconnection mechanism 100, splined shaft 200, splined sleeve 300, and half-shaft 400 are also included.

[0034] Mounting base 1, mounting groove 11, first guide rib 12, second guide rib 13, sub-guide rib 131, through hole 14, driving structure 2, driving component 21, gear set 22, driving screw 3, movable structure 4, bushing 41, first guide groove 411, slider 42, pushing part 421, slider seat 43, second guide groove 431, first elastic element 51, second elastic element 52. Detailed Implementation

[0035] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0036] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and 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 of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] The following is for reference. Figures 1-11The present invention describes a drive shaft disconnection mechanism 100 according to an embodiment of the present invention. The drive shaft disconnection mechanism 100 can solve the problems of the inability to move the shift fork and the inability to disconnect or engage the power caused by the existing shift fork structure. It also enables the auxiliary drive axle power of the whole vehicle to be accurately, stably and quickly engaged or disengaged, thereby improving power transmission efficiency, enhancing vehicle handling and improving fuel economy.

[0039] like Figures 1-11 As shown, the drive shaft disconnection mechanism 100 according to an embodiment of the present invention includes: a mounting base 1, a drive structure 2, and a movable structure 4.

[0040] The drive shaft includes a spline sleeve 300 and a spline shaft 200. The spline sleeve 300 is fitted over the spline shaft 200. That is, the spline sleeve 300 has an internal spline and the spline shaft 200 has an external spline. The shapes and sizes of the internal and external splines are matched, so the spline sleeve 300 and the spline shaft 200 can be tightly connected through the tight fit of the internal and external splines, which can effectively transmit torque and ensure that the drive shaft can effectively transmit power.

[0041] Mounting base 1 has a mounting groove 11, see attached figure. Figure 1 Appendix Figure 9 and attached Figure 10 As shown, the interior of the mounting base 1 is hollow to form a mounting groove 11, and the mounting groove 11 is open to the upward so as to facilitate the installation of the drive structure 2 and the movable structure 4 in the mounting groove 11, to support and fix the drive structure 2 and the movable structure 4, and to ensure that the drive structure 2 and the movable structure 4 can work stably.

[0042] It should be noted that the drive shaft disconnection mechanism 100 can be used to engage and disengage the spline sleeve 300 and the spline shaft 200. In other words, it can make the internal spline and the external spline either engaged or disengaged, thereby blocking the power transmission of the drive shaft or enabling the power transmission of the drive shaft.

[0043] The drive structure 2 is a power source used to provide power to the disconnection mechanism 100 of the entire drive shaft to ensure the normal operation of the disconnection mechanism. The drive structure 2 is connected to the drive screw 3, that is, the drive structure 2 can transmit power to the drive screw 3 to drive the drive screw 3 to rotate. The drive screw 3 is rotatably installed in the mounting groove 11, that is, the drive screw 3 is installed in the mounting groove 11 and can rotate stably in the mounting groove 11.

[0044] Furthermore, the movable structure 4 is sleeved outside the drive screw 3 and at least partially threaded with the drive screw 3 so that it moves along the axial direction of the drive screw 3 when the drive screw 3 rotates and pushes the spline sleeve 300 to move axially relative to the spline shaft 200. The movable structure 4 is also guided to the inner wall of the mounting groove 11 along the axial direction of the drive screw 3.

[0045] Specifically, the movable structure 4 is a structural component that can move within the mounting groove 11. The movement of the movable structure 4 enables the spline sleeve 300 and the spline shaft 200 to engage or disengage. The movable structure 4 has a through hole that matches the shape and size of the drive screw 3, allowing the drive screw 3 to pass smoothly through the through hole, thus ensuring the movable structure 4 is fitted over the drive screw 3. At least a portion of the through hole in the movable structure 4 contains an internal thread that matches the external thread on the drive screw 3, achieving a threaded engagement between at least a portion of the movable structure 4 and the drive screw 3. Therefore, when the drive screw 3 rotates, the movable structure 4 can move linearly along the axial direction of the drive screw 3, and can contact or connect with the spline sleeve 300 to achieve the desired engagement. When the moving structure 4 moves, it drives the spline sleeve 300 to move axially relative to the spline shaft 200, thereby realizing the engagement or disengagement of the spline shaft 200 and the spline sleeve 300. This allows the drive shaft to transmit power or disconnect the power transmission, thereby realizing the engagement or disengagement of the auxiliary drive axle power of the whole vehicle. That is, when it is in the disengaged state, the power of the wheel, half shaft 400 and rotating components such as the main and driven gears is interrupted, avoiding the continuous rotation of the main and driven gears, drive shafts and other components during vehicle operation. This reduces the energy loss caused by back-mounted loads and solves the problem of the existing shift fork structure being unable to shift the shift fork and unable to disconnect or engage the power.

[0046] The movable structure 4 and the inner wall of the mounting groove 11 are guided and fitted along the axial direction of the drive screw 3. That is, the shape and size of the movable structure 4 match the shape and size of the inner wall of the mounting groove 11 to achieve axial guidance. This provides axial guidance for the movable structure 4, ensuring that it can move accurately and stably along the axial direction of the drive screw 3 without deviation or shaking. This enables the efficient and stable operation of the drive shaft disconnection mechanism 100, allowing the auxiliary drive axle power of the vehicle to be precisely and stably engaged or disengaged quickly. This ensures that power is quickly transmitted when needed and disconnected in time when not needed, avoiding unnecessary energy loss, improving power transmission efficiency, enhancing vehicle handling, and improving fuel economy.

[0047] It should be noted that the drive shaft disconnection mechanism 100 of this embodiment can be applied to any drive shaft with spline sleeve 300 and spline shaft 200 that requires power engagement and disconnection, and can also be applied to the engagement and disconnection of auxiliary drive axles in four-wheel drive or two-wheel drive vehicles.

[0048] Therefore, by converting the rotational motion of the drive screw 3 into the linear motion of the movable structure 4, the driving force is transmitted to the spline sleeve 300, which in turn drives the spline sleeve 300 to move axially relative to the spline shaft 200, thereby enabling the spline sleeve 300 to engage or disengage from the spline shaft 200. This disconnection device enables the engagement or disengagement of the auxiliary drive axle power of the entire vehicle, interrupting the power supply to the wheels, half-shaft 400, and rotating components such as the main and driven gears. This prevents the main and driven gears, drive shafts, and other components from continuously rotating during vehicle operation, thus reducing energy loss caused by backlash. It also solves the problem of the existing shift fork structure being unable to shift the shift fork or disconnect or engage the power supply. At the same time, through the guiding cooperation between the movable structure 4 in the disconnection mechanism and the inner wall of the mounting groove 11 along the axial direction of the drive screw 3, the auxiliary drive axle power of the entire vehicle can be precisely, stably, and quickly engaged or disengaged. This ensures that power is quickly transmitted when needed and promptly disconnected when not needed, avoiding unnecessary energy loss, improving power transmission efficiency, enhancing vehicle handling, and improving fuel economy.

[0049] In some embodiments, the movable structure 4 includes a bushing 41, a slider 42, and a slider seat 43 sleeved on the drive screw 3. The bushing 41 is threadedly engaged with the drive screw 3. A first elastic element 51 is provided between the side of the slider seat 43 facing away from the bushing 41 and the mounting base 1. The slider 42 is slidably mounted on the slider seat 43. A second elastic element 52 is elastically pressed between the side of the slider 42 facing the bushing 41 and the slider seat 43. The slider 42 is provided with a pushing part 421 for pushing the spline sleeve 300 to move axially relative to the spline shaft 200.

[0050] Specifically, such as Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the movable structure 4 includes a bushing 41, a slider 42, and a slider seat 43 sleeved around the drive screw 3. The bushing 41, slider 42, and slider seat 43 can all move axially along the drive screw 3. The bushing 41 and the mounting base 1 are located at opposite ends of the drive screw 3. Figure 5 and Figure 6 As shown in the left-right direction, the right end of the drive screw 3 is mounted on the mounting base 1 and connected to the drive structure 2 to receive power from the drive structure 2, thereby allowing the drive screw 3 to rotate within the mounting groove 11. At least a portion of the drive screw 3 has external threads, and the bushing 41 has a first through hole with an internal thread that matches the external threads on the drive screw 3. Thus, the bushing 41 can be fitted onto the drive screw 3 for threaded engagement. When the drive screw 3 rotates, the bushing 41 can move linearly along the axial direction of the drive screw 3 to move closer to or further away from the mounting base 1.

[0051] like Figure 3 , Figure 5 and Figure 6 As shown, a first elastic element 51 is provided between the right side of the slider seat 43 away from the bushing 41 and the mounting base 1. The first elastic element 51 is sleeved on the outside of the drive screw 3. The first elastic element 51 plays an elastic pressing role and can elastically press against the slider seat 43 and the mounting base 1 to extend and retract. Its elastic force can make the slider seat 43 move and reset. That is, when the bushing 41 is close to the mounting base 1, the bushing 41 pushes the mounting base 1 to move together and compress the first elastic element 51. When the bushing 41 is away from the mounting base 1, the elastic force of the first elastic element 51 pushes the slider seat 43 to reset.

[0052] like Figure 3 , Figure 5 and Figure 6 As shown, the slider seat 43 is located between the bushing 41 and the mounting base 1. The slider 42 and the second elastic element 52 are installed inside the slider seat 43, and both the slider 42 and the second elastic element 52 are sleeved on the outside of the drive screw 3. The second elastic element 52 is located between the left side of the slider 42 facing the bushing 41 and the slider seat 43. The second elastic element 52 also plays the role of elastic pressing, and can elastically press against the slider 42 and the mounting base 1 to extend and retract. Its elastic force can make the slider 42 slide in the slider seat 43. The slider 42 is provided with a pushing part 421. When the slider 42 moves, the pushing part 421 can move together with the slider 42 on the drive screw 3 to push the spline sleeve 300 to move axially relative to the spline shaft 200, pushing the spline sleeve 300 to one side or the other side of the spline shaft 200 to realize the engagement or disengagement of the two.

[0053] Furthermore, the bushing 41 and the slider seat 43 are respectively guided and engaged with the inner wall of the mounting groove 11 along the axial direction of the drive screw 3.

[0054] Therefore, the inner wall of the mounting groove 11 can provide a clear movement path for the bushing 41 and the slider seat 43, that is, to provide precise guidance for the bushing 41 and the slider seat 43, so as to ensure that the bushing 41 and the slider seat 43 can move stably along the axial direction of the drive screw 3, avoiding the bushing 41 and the slider seat 43 from deflection or misalignment during movement. This allows the slider 42 to drive the push part 421 to move precisely and stably, so as to drive the spline sleeve 300 to move precisely axially relative to the spline shaft 200, thereby ensuring that the drive shaft disconnection mechanism 100 can work stably and reliably, and thus ensuring that the auxiliary drive axle power of the whole vehicle can be precisely, stably and quickly engaged or disengaged, improving the vehicle's controllability.

[0055] In practice, such as Figure 6As shown in the left-right direction, when the drive screw 3 rotates in one direction to make the bushing 41 gradually move closer to the mounting base 1 (i.e., move to the right), the bushing 41, guided by the inner wall of the mounting groove 11, pushes the slider seat 43, causing the slider seat 43 to also move axially along the drive screw 3 under the guidance of the inner wall of the mounting groove 11, gradually approaching the mounting base 1 and compressing the first elastic element 51. The slider seat 43 then drives the slider 42 to move together. Simultaneously, the pushing part 421 follows the slider 42, gradually approaching the mounting base 1 and pushing the spline sleeve 300 to move axially to the right relative to the spline shaft 200, so that the spline sleeve 300 engages with the spline shaft 200. At the same time, during the process of the bushing 41 pushing the slider seat 43 and the slider 42 to the right to the engagement position, the splines of the spline sleeve 300 and the spline shaft 200 will... In the spline-aligned state, the bushing 41 will still push the slider seat 43 to compress the first elastic element 51 under the guidance of the inner wall of the mounting groove 11 and continue to move to the engagement position. However, the slider 42 assembled in the slider seat 43 cannot drive the pushing part 421 to move to the engagement position. At this time, the second elastic element 52 is compressed by the slider 42 and the slider seat 43 to store force. When the spline sleeve 300 and the spline shaft 200 reach the engagement condition again, the second elastic element 52 releases its elastic force. The elastic force of the second elastic element 52 can be used to continue to push the slider 42 to slide to the right in the slider seat 43 to drive the spline shaft 200 and the spline sleeve 300 to engage, so that the slider 42 can move to the engagement position, thereby ensuring the normal use of the drive shaft motor and eliminating the risk of motor stalling and damage caused by the spline not being able to engage properly after alignment.

[0056] Similarly, when the drive screw 3 rotates in the opposite direction to guide the bushing 41 to gradually move away from the mounting seat 1 (i.e., to the left) under the guidance of the inner wall of the mounting groove 11, the first elastic element 51 releases elastic force to push the slider seat 43 and the slider 42 to move away from the mounting seat 1 together. At the same time, the pushing part 421 follows the slider 42 to move away from the mounting seat 1 and pushes the spline sleeve 300 to move axially to the left relative to the spline shaft 200, so that the spline sleeve 300 is disconnected from the spline shaft 200, until it moves to the position where the spline sleeve 300 is disconnected from the spline shaft 200, thereby realizing the rapid disconnection of the auxiliary drive axle power of the whole vehicle.

[0057] Thus, by driving the screw 3 to rotate in two directions, the drive sleeve 41 moves in two opposite directions along the axial direction of the drive screw 3 under the guidance of the inner wall of the mounting groove 11, so that the push part 421 can push the spline sleeve 300 to move from the engaged position to the disengaged position or from the disengaged position to the engaged position along the axial direction of the spline shaft 200, thereby realizing the rapid engagement or disengagement of the auxiliary drive axle power of the whole vehicle.

[0058] In some embodiments, the bushing 41 is provided with a first guide portion, and the inner wall of the mounting groove 11 is provided with a first guide mating portion, and the first guide portion and the first guide mating portion are guided and mated along the axial direction of the drive screw 3.

[0059] In other words, the shape and size of the first guide part are adapted to the shape and size of the second guide mating part. For example, the first guide part and the first guide mating part can be configured as a guide groove and a guide block, a guide rail and a guide block, etc., so that the first guide part and the first guide mating part can be guided and mated along the axial direction of the drive screw 3. Thus, through the guided and mated first guide part and the first guide mating part, the bushing 41 can stably move linearly along the axial direction of the drive screw 3 under the guidance of the inner wall of the mounting groove 11, preventing the bushing 41 from deflecting or shaking during the movement.

[0060] In other embodiments, the slider seat 43 is provided with a second guide portion, and the inner wall of the mounting groove 11 is provided with a second guide mating portion. The second guide portion and the second guide mating portion are guided and mated along the axial direction of the drive screw 3.

[0061] In other words, the shape and size of the second guide part are adapted to the shape and size of the second guide mating part. For example, the second guide part and the second guide mating part can be configured as a guide groove and a guide block, a guide rail and a guide block, etc., so that the second guide part and the second guide mating part can be guided and mated along the axial direction of the drive screw 3. Thus, through the guiding and mating of the second guide part and the second guide mating part, the slider seat 43 can stably move linearly along the axial direction of the drive screw 3 under the guidance of the inner wall of the mounting groove 11, preventing the slider seat 43 from deviating or shaking during the movement.

[0062] In some embodiments, one of the first guide portion and the first guide mating portion is configured as a first guide rib 12 and the other is configured as a first guide groove 411, with the first guide rib 12 extending into the first guide groove 411.

[0063] In other words, the first guide portion can be constructed as a first guide rib 12, and the first guide mating portion can be constructed as a first guide groove 411. Alternatively, the first guide portion can be constructed as a first guide groove 411, and the first guide mating portion can be constructed as a first guide rib 12. The shape and size of the first guide groove 411 and the first guide rib 12 are adapted to each other, so that the first guide rib 12 can smoothly extend into the first guide groove 411 to achieve the guiding mating between the bushing 41 and the inner wall of the mounting groove 11.

[0064] Specifically, such as Figure 7 and Figure 8As shown, the first guide portion is constructed as a first guide groove 411, which extends axially along the drive screw 3 and is constructed as a rectangular groove. Of course, it can also be constructed as a circular groove, elliptical groove, polygonal groove, irregular groove, etc., and can be flexibly configured according to actual conditions and needs, not limited to the embodiment described herein. For example, Figure 9 and Figure 10 As shown, the first guide fitting part is constructed as a first guide rib 12. The first guide rib 12 protrudes upward on the inner wall of the mounting groove 11 and extends along the axial direction of the drive screw 3. The first guide rib 12 is constructed as a long rectangular rib that matches the first guide groove 411. Thus, the first guide rib 12 can smoothly extend upward into the first guide groove 411 to achieve the guide fitting between the bushing 41 and the inner wall of the mounting groove 11. This allows the bushing 41 to move stably along the axial direction of the drive screw 3 under the guidance of the inner wall of the mounting groove 11. In other words, when the bushing 41 moves linearly along the axial direction of the drive screw 3, it also moves along the first guide rib 12 on the inner wall of the mounting groove 11, making the movement of the bushing 41 more stable and reliable.

[0065] In some other embodiments, one of the second guide portion and the second guide mating portion is configured as a second guide rib 13 and the other is configured as a second guide groove 431, with the second guide rib 13 extending into the second guide groove 431.

[0066] In other words, the second guide portion can be constructed as a second guide rib 13, and the second guide mating portion can be constructed as a second guide groove 431. Alternatively, the second guide portion can be constructed as a second guide groove 431, and the second guide mating portion can be constructed as a second guide groove 431. The shape and size of the second guide groove 431 are adapted to the second guide rib 13, so that the second guide rib 13 can smoothly extend into the second guide groove 431 to achieve the guiding mating between the mounting base 1 and the inner wall of the mounting groove 11.

[0067] Specifically, such as Figure 11 As shown, the second guide portion is constructed as a second guide groove 431, which extends axially along the drive screw 3 and is constructed as a rectangular groove. Of course, it can also be constructed as a circular groove, elliptical groove, polygonal groove, irregular groove, etc., and can be flexibly configured according to actual conditions and needs, not limited to the embodiment described herein. For example, Figure 9 and Figure 10As shown, the second guide mating part is constructed as a second guide rib 13. The second guide rib 13 protrudes upward on the inner wall of the mounting groove 11 and extends along the axial direction of the drive screw 3. The second guide rib 13 is constructed as a long rectangular rib that matches the second guide groove 431. Thus, the second guide rib 13 can smoothly extend upward into the second guide groove 431 to achieve the guiding mating between the slider seat 43 and the inner wall of the mounting groove 11. This allows the slider seat 43 to move stably along the axial direction of the drive screw 3 under the guidance of the inner wall of the mounting groove 11. In other words, when the slider seat 43 moves linearly along the axial direction of the drive screw 3, it also moves along the second guide rib 13 on the inner wall of the mounting groove 11, making the movement of the slider seat 43 more stable and reliable.

[0068] In some embodiments, such as Figure 7 , Figure 8 and Figure 11 As shown, the first guide portion is constructed as a first guide groove 411, and the second guide portion is constructed as a second guide groove 431. The first guide groove 411 and the second guide groove 431 are distributed opposite each other along the axial direction of the drive screw 3, that is, the first guide groove 411 and the second guide groove 431 correspond to each other in the length direction of the drive screw 3, and the extension direction of the first guide groove 411 and the second guide groove 431 is consistent with the axial direction of the drive screw 3. In other words, the extension directions of the first guide groove 411 and the second guide groove 431 are located on the same horizontal line. Therefore, the bushing 41 and the slider seat 43 can move smoothly and accurately along the axial direction of the drive screw 3 simultaneously under the guidance of the first guide groove 411 and the second guide groove 431.

[0069] Furthermore, such as Figure 9 and Figure 10 As shown, the first guide fitting part is constructed as a first guide rib 12, and the second guide fitting part is constructed as a second guide rib 13. The first guide rib 12 and the second guide rib 13 are distributed opposite each other along the axial direction of the drive screw 3, that is, the first guide rib 12 and the second guide rib 13 correspond to each other in the length direction of the drive screw 3, and the extension direction of the first guide rib 12 and the second guide rib 13 is consistent with the axial direction of the drive screw 3. In other words, the extension direction of the first guide rib 12 and the second guide rib 13 is located on the same horizontal line. Therefore, the bushing 41 and the slider seat 43 can move smoothly and accurately along the axial direction of the drive screw 3 simultaneously under the guidance of the first guide rib 12 and the second guide rib 13.

[0070] In some embodiments, the second guide rib 13 is configured as two spaced guide ribs 131, and the slider seat 43 is provided with a through hole 14 for the push part 421 to pass through. The through hole 14 is located between the two guide ribs 131, wherein the first guide rib 12 is directly connected to one of the guide ribs 131.

[0071] Specifically, such as Figure 10 As shown, the second guide rib 13 is configured as two segments of guide rib 131 spaced apart along the axial direction of the drive screw 3. The mounting groove 11 of the slider seat 43 is provided with a through hole 14 for the push part 421 to pass through. That is, the push part 421 can pass through the through hole 14 to contact the spline sleeve 300, and the push part 421 can move in the through hole 14 to realize the axial movement of the spline sleeve 300 relative to the spline shaft 200. Figure 10 The through hole 14 shown is an elongated hole, which can fully accommodate the pushing part 421 and facilitate the movement of the pushing part 421. Of course, the through hole 14 can also be set to other shapes, which can be flexibly set according to the needs.

[0072] Among them, the through hole 14 is located between the two guide ribs 131, such as Figure 10 As shown in the left-right direction, one section of guide rib 131 is located on the left side of the through hole 14, and the other section of guide rib 131 is located on the right side of the through hole 14. Thus, the through hole 14 separates the two sections of guide rib 131. It can be understood that the total length of the two sections of guide rib 131 is the length of the second guide rib 13, which is the range of movement of the slider seat 43. In other words, the two sections of guide rib 131 can play a limiting role, which can limit the range of movement of the slider seat 43, thereby reducing the compression of the first elastic element 51. This avoids excessive compression of the first elastic element 51 caused by excessive rightward movement of the slider seat 43, thereby preventing the motor from stalling and extending the service life of the motor.

[0073] In practice, such as Figure 11 As shown, the second guide groove 431 is also divided into two sections. Figure 11The left-right direction is the length direction of the slider seat 43. One end of the second guide groove 431 is located on the bottom left side of the slider seat 43, and the other end of the second guide groove 431 is located on the bottom right side of the slider seat 43. When the slider seat 43 moves to the left along the axial direction of the drive screw 3, until it reaches the end of the left sub-guide rib 131, at this time, the outer wall of the right end of the left sub-guide rib 131 abuts against the inner wall of the right side of the second guide groove 431 on the left. That is, the left sub-guide rib 131 abuts against the slider seat 43, restricting the slider seat 43 from moving further to the left. Correspondingly, when the slider seat 43 moves to the right along the axial direction of the drive screw 3, until it reaches the end of the right sub-guide rib 131, at this time, the outer wall of the left end of the right sub-guide rib 131 abuts against the inner wall of the right side of the second guide groove 431 on the right. That is, the right sub-guide rib 131 abuts against the slider seat 43, restricting the slider seat 43 from moving further to the right, and reducing the compression of the first elastic element 51.

[0074] In practical design, such as Figure 9 and Figure 10 As shown, the sub-guide rib 131 on the left side and the first guide rib 12 can be integrated into one piece for manufacturing, which improves manufacturing convenience.

[0075] In some embodiments, the first guide portion is disposed at the bottom of the bushing 41, and the first guide mating portion is disposed on the inner bottom wall of the mounting groove 11.

[0076] Specifically, such as Figure 7 and Figure 8 As shown, the first guide portion is located at the bottom of the bushing 41, as... Figure 9 and Figure 10 As shown, the first guide mating part is provided on the inner bottom wall of the mounting groove 11, and the positions of the first guide part and the first guide mating part correspond to each other so as to facilitate the guide mating of the first guide part and the first guide mating part.

[0077] In other embodiments, the second guide portion is located at the bottom of the slider seat 43, and the second guide mating portion is located on the inner bottom wall of the mounting groove 11.

[0078] Specifically, such as Figure 11 As shown, the second guide portion is located at the bottom of the slider seat 43, as... Figure 9 and Figure 10 As shown, the second guide mating part is provided on the inner bottom wall of the mounting groove 11, and the positions of the second guide part and the second guide mating part correspond to each other so as to facilitate the guiding mating of the second guide part and the second guide mating part.

[0079] In some embodiments, the drive structure 2 includes a drive member 21 and a gear set 22, the gear set 22 being connected to the drive member 21 and the drive screw 3 respectively, and the drive member 21 being adapted to drive the drive screw 3 to rotate through the gear set 22.

[0080] Specifically, such as Figure 5 As shown, the drive structure 2 includes a drive component 21 and a gear set 22. The drive component 21 is the power source for the disconnection mechanism, providing rotational power to the drive screw 3. The gear set 22 is connected to both the drive component 21 and the drive screw 3. Specifically, the input end of the gear set 22 is connected to the drive component 21 to receive the power transmitted by the drive component 21, and the output end of the gear set 22 is connected to the drive screw 3 to transmit power to the drive screw 3 to drive it to rotate. Thus, the power transmission from the drive component 21 to the drive screw 3 is realized.

[0081] In practice, the driving component 21 drives the gear set 22 to rotate, and the rotation of the gear set 22 drives the drive screw 3 to rotate, thereby transmitting power through the gear set 22 to the drive screw 3, which in turn can be transmitted to the movable structure 4, thus achieving effective power transmission.

[0082] In actual design, the drive component 21 can be constructed as a drive motor. The clockwise and counterclockwise rotation of the drive screw 3 can be achieved by the forward and reverse rotation of the drive motor, thereby enabling the bushing 41 to move in two opposite directions along the axial direction of the drive screw 3.

[0083] This utility model also proposes a drive shaft assembly 1000.

[0084] According to an embodiment of the present invention, a drive shaft assembly 1000 includes a spline shaft 200, a spline sleeve 300, and a drive shaft disconnection mechanism 100 of any of the above embodiments. The spline sleeve 300 is sleeved on the outside of the spline shaft 200. The pushing part 421 is adapted to push the spline sleeve 300 to move relative to the spline shaft 200 in a first direction so that the spline sleeve 300 and the spline shaft 200 are circumferentially driven, and is also adapted to push the spline sleeve 300 to move relative to the spline shaft 200 in a second direction so that the spline sleeve 300 and the spline shaft 200 are circumferentially unlocked. The first direction and the second direction are opposite.

[0085] Specifically, such as Figure 1 As shown, the drive shaft assembly 1000 includes a splined shaft 200, a splined sleeve 300, and a drive shaft disconnection mechanism 100. The disconnection mechanism is used to engage or disengage the splined shaft 200 and the splined sleeve 300, enabling circumferential transmission or circumferential unlocking between the splined sleeve 300 and the splined shaft 200. The splined sleeve 300 is fitted over the splined shaft 200, with the first direction and the second direction being... Figure 1In the left-right direction shown, the pushing part 421 can push the spline sleeve 300 to move to the right relative to the spline shaft 200 so that the inner spline of the spline sleeve 300 engages with the outer spline of the spline shaft 200, realizing circumferential transmission between the spline sleeve 300 and the spline shaft 200, allowing the drive shaft to transmit torque and power. The pushing part 421 can also push the spline sleeve 300 to move to the left relative to the spline shaft 200 so that the inner spline of the spline sleeve 300 separates from the outer spline of the spline shaft 200, and is in an unengaged state, realizing circumferential unlocking between the spline sleeve 300 and the spline shaft 200, and disconnecting the power transmission of the drive shaft.

[0086] In practice, such as Figure 1 and Figure 4 As shown, one end of the spline shaft 200 is as follows Figure 1 The left end of the half-shaft 400 can be connected to the half-shaft 400. The outer peripheral wall of the half-shaft 400 is provided with an external spline that matches the internal spline of the spline sleeve 300. Thus, when the spline sleeve 300 moves to the right relative to the spline shaft 200 so that the internal spline of the spline sleeve 300 meshes with the external spline of the spline shaft 200, the spline sleeve 300 can also simultaneously mesh with the external spline of the half-shaft 400, thereby realizing the power connection between the half-shaft 400 and the drive shaft, and the other end of the spline shaft 200... Figure 1 The right end of the spline sleeve 300 can be connected to the mechanical wheel (not shown in the figure). Thus, when the inner spline of the spline sleeve 300 is engaged with the outer spline of the half shaft 400 and the spline shaft 200, the half shaft 400 can transmit power to the mechanical wheel through the spline shaft 200 to realize the power engagement function of the vehicle's auxiliary drive axle. When the inner spline of the spline sleeve 300 is disconnected from the outer spline of the spline shaft 200, the half shaft 400 cannot transmit power to the mechanical wheel through the spline shaft 200, that is, the power between the half shaft 400 and the mechanical wheel is interrupted, thus realizing the power disconnection function of the vehicle's auxiliary drive axle.

[0087] This utility model also proposes a vehicle.

[0088] The vehicle according to the present utility model is provided with a drive shaft assembly 1000 of any of the above embodiments.

[0089] According to the vehicle of this utility model embodiment, by setting the aforementioned drive shaft assembly 1000, the rotational motion of the drive screw 3 is converted into the linear motion of the movable structure 4, and the driving force is transmitted to the spline sleeve 300 to drive the spline sleeve 300 to move axially relative to the spline shaft 200, thereby realizing the engagement or disengagement of the spline sleeve 300 and the spline shaft 200. Thus, the engagement or disengagement of the auxiliary drive axle power of the whole vehicle is realized through the disconnection device, interrupting the power of the wheels, half shaft 400 and rotating components such as the main and driven gears, thereby reducing the energy loss caused by back-mounting. This solves the problem of the inability to move the shift fork and the inability to disconnect or engage the power caused by the existing shift fork structure. At the same time, through the guiding cooperation between the movable structure 4 and the inner wall of the mounting groove 11 along the axial direction of the drive screw 3, the power of the auxiliary drive axle of the whole vehicle can be accurately and stably engaged or disengaged quickly, thereby ensuring that the power is quickly transmitted when needed and disconnected in time when not needed, avoiding unnecessary energy loss, improving power transmission efficiency, enhancing vehicle handling, and improving fuel economy.

[0090] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0091] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A disconnection mechanism for a drive shaft, characterized in that, The drive shaft includes a spline sleeve and a spline shaft, the spline sleeve being fitted over the spline shaft, and the disconnection mechanism includes: Mounting base, wherein the mounting base is formed with a mounting groove; A drive structure is provided, wherein a drive screw is connected to the drive structure, and the drive screw is rotatably mounted in the mounting groove; A movable structure is sleeved outside the drive screw and at least partially threaded to the drive screw to move axially along the drive screw when the drive screw rotates, thereby pushing the spline sleeve to move axially relative to the spline shaft, and the movable structure is guided to the inner wall of the mounting groove along the axial direction of the drive screw.

2. The drive shaft disconnection mechanism according to claim 1, characterized in that, The movable structure includes a bushing, a slider, and a slider seat that are sleeved on the drive screw. The bushing is threaded to the drive screw. A first elastic element is provided between the side of the slider seat facing away from the bushing and the mounting base. The slider is slidably mounted on the slider seat. A second elastic element is elastically pressed between the side of the slider facing the bushing and the slider seat. The slider is provided with a pushing part for pushing the spline sleeve to move axially relative to the spline shaft. The bushing and the slider seat are respectively guided and engaged with the inner wall of the mounting groove along the axial direction of the drive screw.

3. The drive shaft disconnection mechanism according to claim 2, characterized in that, The bushing is provided with a first guide portion, and the inner wall of the mounting groove is provided with a first guide mating portion. The first guide portion and the first guide mating portion are guided and mated along the axial direction of the drive screw. And / or, the slider seat is provided with a second guide portion, and the inner wall of the mounting groove is provided with a second guide mating portion, the second guide portion and the second guide mating portion being guided and mated along the axial direction of the drive screw.

4. The drive shaft disconnection mechanism according to claim 3, characterized in that, One of the first guide portion and the first guide mating portion is configured as a first guide rib and the other is configured as a first guide groove, wherein the first guide rib extends into the first guide groove; And / or, one of the second guide portion and the second guide mating portion is configured as a second guide rib and the other is configured as a second guide groove, the second guide rib extending into the second guide groove.

5. The drive shaft disconnection mechanism according to claim 4, characterized in that, The first guide portion is constructed as the first guide groove, and the second guide portion is constructed as the second guide groove. The first guide groove and the second guide groove are distributed opposite each other along the axial direction of the drive screw. The first guide mating part is constructed as the first guide rib, and the second guide mating part is constructed as the second guide rib. The first guide rib and the second guide rib are distributed opposite each other along the axial direction of the drive screw.

6. The drive shaft disconnection mechanism according to claim 5, characterized in that, The second guide rib is configured as two spaced sub-guide ribs, and the mounting groove is provided with a through hole for the pusher to pass through, the through hole being located between the two sub-guide ribs; The first guide rib is directly connected to one of the sub-guide ribs.

7. The drive shaft disconnection mechanism according to claim 3, characterized in that, The first guide portion is located at the bottom of the bushing, and the first guide mating portion is located on the inner bottom wall of the mounting groove; And / or, the second guide portion is located at the bottom of the slider seat, and the second guide mating portion is located on the inner bottom wall of the mounting groove.

8. The drive shaft disconnection mechanism according to any one of claims 1-7, characterized in that, The driving structure includes a driving component and a gear set, the gear set being connected to the driving component and the driving screw respectively, and the driving component being adapted to drive the driving screw to rotate through the gear set.

9. A drive shaft assembly, characterized in that, The device includes a spline shaft, a spline sleeve, and a disconnection mechanism for a drive shaft according to any one of claims 1-8, wherein the spline sleeve is sleeved outside the spline shaft, and the movable structure is adapted to push the spline sleeve relative to the spline shaft in a first direction to cause circumferential transmission between the spline sleeve and the spline shaft, and is adapted to push the spline sleeve relative to the spline shaft in a second direction to cause circumferential unlocking between the spline sleeve and the spline shaft, wherein the first direction is opposite to the second direction.

10. A vehicle, characterized in that, The drive shaft assembly of claim 9 is provided.

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