Disconnecting mechanism of driving shaft, driving shaft assembly and vehicle

Abstract

The utility model discloses a disconnecting mechanism of a driving shaft, a driving shaft assembly and a vehicle, the driving shaft comprises a spline housing and a spline shaft, the disconnecting mechanism of the driving shaft comprises a driving structure and a mounting seat, and the driving structure comprises a driving screw rod rotatably arranged on the mounting seat in a penetrating manner; the movable structure comprises a shaft sleeve, a sliding block and a sliding block seat, the shaft sleeve is arranged outside the driving screw in a sleeving mode, the sliding block seat is located between the shaft sleeve and the installation seat, a first elastic piece elastically abuts against the position between the sliding block seat and the installation seat, the shaft sleeve is in threaded fit with the driving screw to move close to or away from the installation seat, and the sliding block is installed on the sliding block seat in a sliding mode; a second elastic piece elastically abuts between the side, facing the shaft sleeve, of the sliding block and the sliding block base, and the sliding block is provided with a pushing part used for pushing the spline housing to axially move relative to the spline shaft. According to the disconnecting mechanism, the spline housing and the spline shaft can be combined or disconnected, so that the driving shaft can transmit power or disconnect power transmission.

Description

Technical Field

[0001] The utility model relates to the field of vehicle manufacturing, in particular to a disconnecting mechanism of a drive shaft, a drive shaft assembly having the disconnecting mechanism of the drive shaft, and a vehicle having the drive shaft assembly. Background Art

[0002] As a core component of modern off-road vehicles and some high-performance vehicles, the four-wheel drive axle is the key to vehicle power transmission and distribution. The four-wheel drive axle not only needs to transmit the power generated by the engine to the four wheels, but also needs to adjust the power distribution between the front and rear axles according to the vehicle's driving status and road conditions to ensure that the vehicle can obtain good traction and stability in various complex environments.

[0003] However, in most low-load or high-speed driving conditions, two-wheel drive can meet the vehicle's usage needs. In two-wheel drive mode, when the vehicle is driving, the wheels will drive the auxiliary drive axle and the drive shaft connected to it to rotate at the same time, thereby generating a certain amount of drag torque, resulting in a decrease in overall efficiency and reducing the vehicle's mileage.

[0004] Among the existing motor vehicles with switchable two-wheel drive and four-wheel drive, some can only disconnect the connection between the engine and the auxiliary drive axle, but cannot interrupt the anti-dragging force of the wheels. Although some have adopted a drive shaft disconnect device, they can only be adapted to normal four-wheel drive vehicles or normal two-wheel drive vehicles separately, and cannot be compatible with both. There is still room for improvement. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a disconnection mechanism of a drive shaft, wherein the disconnection mechanism of the drive shaft can realize the connection or disconnection of the spline sleeve and the spline shaft, so that the drive shaft can transmit power or disconnect the transmission of power.

[0006] According to the disconnecting mechanism of the driving shaft of the embodiment of the utility model, the driving shaft includes a spline sleeve and a spline shaft, the spline sleeve is sleeved outside the spline shaft, and the disconnecting mechanism includes: a driving structure and a mounting seat, the driving structure includes a driving screw rotatably inserted into the mounting seat; a movable structure, the movable structure includes a sleeve, a slider and a slider seat sleeved outside the driving screw, the slider seat is located between the sleeve and the mounting seat, a first elastic member is elastically pressed between the slider seat and the mounting seat, the sleeve and the driving screw thread cooperate to move closer to or away from the mounting seat, the slider is slidably installed on the slider seat, a second elastic member is elastically pressed between the side of the slider facing the sleeve and the slider seat, and the slider is provided with a pushing portion for pushing the spline sleeve to move axially relative to the spline shaft.

[0007] The disconnection mechanism of the drive shaft according to the embodiment of the utility model is ensured to work normally by setting a driving structure, a mounting seat and a movable structure, and the rotational motion of the drive screw is converted into the linear motion of the slider and its pushing part by the movable structure, and the pushing force of the pushing part is transmitted to the spline sleeve to realize the connection or disconnection between the spline sleeve and the spline shaft, so that the drive shaft can transmit power or disconnect the transmission of power, thereby realizing that the vehicle is in a connected state in the auxiliary drive bridge four-wheel drive mode to ensure sufficient power for the whole vehicle, and realizing that the vehicle is in a disconnected state in the two-wheel drive mode to interrupt the power of the wheels and rotating parts such as the main gear, and avoid driving the main gear, transmission shaft and other components to rotate during the operation of the vehicle, thereby reducing the energy loss caused by reverse drag, and through the design of the second elastic member, the problem of the traditional disconnection mechanism having no energy storage structure and requiring speed regulation is solved, and the problem of easy jamming when switching between two-wheel drive or four-wheel drive when parking is solved, thereby ensuring the reliability of vehicle operation.

[0008] According to the disconnection mechanism of the drive shaft of some embodiments of the utility model, the first elastic member is sleeved outside the drive screw, and the two ends of the first elastic member are respectively abutted against the slider seat and the mounting seat; and / or the second elastic member is sleeved outside the drive screw, and the two ends of the second elastic member are respectively abutted against the slider and the slider seat.

[0009] According to the disconnection mechanism of the drive shaft in some embodiments of the utility model, the slider seat is formed with a hollow groove, the drive screw passes through the hollow groove, the slider is installed in the hollow groove, and the second elastic member is pressed between the inner end surface of the hollow groove and the slider.

[0010] According to some embodiments of the utility model, the disconnecting mechanism of the drive shaft also includes a limit block, which is spaced apart and relatively distributed from the mounting seat, one end of the drive screw is rotatably inserted into the mounting seat, and the other end of the drive screw is rotatably inserted into the limit block, and the sleeve is limited and pressed against the limit block when it moves to a maximum position in a direction away from the mounting seat.

[0011] According to the disconnection mechanism of the drive shaft of some embodiments of the utility model, the drive structure includes a drive member and a gear set, the gear set is connected to the drive member and the drive screw respectively, and the drive member is suitable for driving the drive screw to rotate through the gear set.

[0012] According to the disconnection mechanism of the drive shaft of some embodiments of the utility model, the gear set includes an input gear, a first transmission gear, a second transmission gear and an output gear, and the first transmission gear and the second transmission gear are coaxially arranged;

[0013] Wherein, the input gear is connected to the output end of the driving member, the input gear is meshed with the first transmission gear, the second transmission gear is meshed with the output gear, and the output gear is fixedly sleeved outside the driving screw.

[0014] According to the disconnection mechanism of the drive shaft in some embodiments of the utility model, the drive member is constructed as a drive motor, the motor shaft of the drive motor and the drive screw are parallel and spaced apart and respectively penetrate the mounting seat, the drive motor and the movable structure are both located on the same side of the mounting seat, and the gear set is located on the other side of the mounting seat.

[0015] According to the disconnection mechanism of the drive shaft of some embodiments of the utility model, the pushing part is constructed as a pushing column, which is protruding from the surface of the slider and is formed with a pushing end, and the pushing end extends out of the slider seat to cooperate with the spline sleeve.

[0016] The utility model also provides a driving shaft assembly.

[0017] According to the embodiment of the utility model, the drive shaft assembly includes a spline shaft, a spline sleeve and the disconnection mechanism of the drive shaft described above, the spline sleeve is arranged outside the spline shaft, the pushing portion is suitable for pushing the spline sleeve to move in a first direction relative to the spline shaft so that the spline sleeve and the spline shaft can be circumferentially transmitted, and is suitable for pushing the spline sleeve to move in a second direction relative to the spline shaft so that the spline sleeve and the spline shaft can be circumferentially unlocked, and the first direction is opposite to the second direction.

[0018] The utility model also provides a vehicle.

[0019] The vehicle according to the embodiment of the utility model is provided with the drive shaft assembly described above.

[0020] The drive shaft assembly and the vehicle have the same advantages as those of the prior art and will not be described in detail here.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 It is a structural schematic diagram of a disconnection mechanism of a drive shaft according to an embodiment of the utility model;

[0024] Figure 2It is a structural schematic diagram of a disconnection mechanism of a drive shaft according to an embodiment of the utility model moving to a position where the spline shaft and the spline sleeve are disconnected;

[0025] Figure 3 It is a structural schematic diagram of a disconnection mechanism of a drive shaft according to an embodiment of the utility model moving to a position where a spline shaft and a spline sleeve are combined;

[0026] Figure 4 It is a structural schematic diagram of the second elastic member in the energy storage state (when compressed) according to an embodiment of the utility model;

[0027] Figure 5 It is an assembly diagram of the first elastic member and the second elastic member according to an embodiment of the utility model.

[0028] Reference numerals:

[0029] Drive shaft assembly 100, drive shaft disconnection mechanism 101,

[0030] Spline sleeve 11, raised end 111, spline shaft 12,

[0031] Driving structure 2, driving motor 21, motor shaft 211, gear set 22, input gear 221, first transmission gear 222, output gear 224,

[0032] Mounting seat 3, driving screw 31,

[0033] The movable structure 4, the shaft sleeve 41, the slider 42, the push column 43, the push end 431, the slider seat 44, the hollow groove 441, the first elastic member 45, the second elastic member 46,

[0034] Limit block 5. DETAILED DESCRIPTION

[0035] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0036] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model 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 on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Unless otherwise specified, the front-to-back direction in this application is the longitudinal direction of the vehicle, that is, the X direction; the left-right direction is the lateral direction of the vehicle, that is, the Y direction; and the up-down direction is the vertical direction of the vehicle, that is, the Z direction.

[0039] Reference below Figure 1-Figure 5 The disconnection mechanism 101 of the drive shaft according to the embodiment of the utility model is described. The disconnection mechanism 101 of the drive shaft can realize the connection or disconnection of the spline sleeve 11 and the spline shaft 12, so that the drive shaft can transmit power or disconnect the transmission of power.

[0040] like Figure 1-Figure 5 As shown, according to the disconnection mechanism 101 of the drive shaft of the embodiment of the utility model, the disconnection mechanism 101 includes: a drive structure 2, a mounting seat 3 and a movable structure 4.

[0041] The drive shaft includes a spline sleeve 11 and a spline shaft 12. The spline sleeve 11 is sleeved on the outside of the spline shaft 12. That is to say, the spline sleeve 11 has an internal spline and the spline shaft 12 has an external spline. The shapes and sizes of the internal spline and the external spline are adapted to each other. Therefore, the spline sleeve 11 can be tightly combined with the spline shaft 12 through the tight fit of the internal spline and the external spline, so that the torque can be effectively transmitted, ensuring that the drive shaft can effectively transmit power.

[0042] It should be noted that the disconnection mechanism 101 of the drive shaft can be used to achieve the connection and disconnection of the spline sleeve 11 and the spline shaft 12. In other words, the inner spline and the outer spline are in an engaged state or in a non-engaged state, thereby blocking the power transmission of the drive shaft.

[0043] The driving structure 2 is used to drive the movable structure 4 to move. The driving structure 2 includes a driving screw 31 rotatably inserted into the mounting seat 3. That is, the mounting seat 3 is provided with a penetration hole so that the driving screw 31 can be inserted into the mounting seat 3 through the penetration hole to fix and support the driving screw 31, ensuring that the driving screw 31 can rotate stably without separation or movement. The driving screw 31 is the power source of the disconnection structure. The rotation of the driving screw 31 drives the disconnection structure to work, thereby driving the movable structure 4 to move.

[0044] Furthermore, the movable structure 4 includes a sleeve 41, a slider 42 and a slider seat 44 which are sleeved on the outside of the driving screw 31. The slider seat 44 is located between the sleeve 41 and the mounting seat 3. A first elastic member 45 is elastically pressed between the slider seat 44 and the mounting seat 3. The sleeve 41 and the driving screw 31 are threadedly matched to move closer to or away from the mounting seat 3. The slider 42 is slidably installed on the slider seat 44. A second elastic member 46 is elastically pressed between the side of the slider 42 facing the sleeve 41 and the slider seat 44. The slider 42 is provided with a pushing portion for pushing the spline sleeve 11 to move axially relative to the spline shaft 12.

[0045] Specifically, Figure 1As shown, the shaft sleeve 41 and the mounting seat 3 are respectively located at the two ends of the driving screw 31, one end of the driving screw 31 is mounted on the mounting seat 3, and a first elastic member 45 is provided on the outer sleeve of the end of the driving screw 31 close to the mounting seat 3. The first elastic member 45 plays a role of elastic pressure and can be elastically pressed together with the slider seat 44 and the mounting seat 3 to be extended and retracted, and its elastic force can make the slider seat 44 move and reset, that is, when the shaft sleeve 41 is close to the mounting seat 3, the shaft sleeve 41 pushes the mounting seat 3 to move and compress the first elastic member 45, and when the shaft sleeve 41 is away from the mounting seat 3, the elastic force of the first elastic member 45 pushes the slider seat 44 to reset. The slider seat 44 is located between the shaft sleeve 41 and the mounting seat 3. The slider seat 44 is installed with a slider 42 and a second elastic member 46. The slider 42 and the second elastic member 46 are both sleeved on the outside of the driving screw 31. The second elastic member 46 also plays a role of elastic pressure, and can be elastically pressed together with the slider 42 and the mounting seat 3 to expand and contract. Its elastic force can make the slider 42 slide in the slider seat 44, and the pushing part can move with the slider 42 on the driving screw 31 to push the spline sleeve 11 to move axially relative to the spline shaft 12, and push the spline sleeve 11 to one side or the other side of the spline shaft 12 to achieve the connection or disconnection of the two. Among them, the sleeve 41 is provided with a first through hole, and the first through hole is provided with an internal thread adapted to the driving screw 31, so that the sleeve 41 can be sleeved on the outside of the driving screw 31 to be threadedly matched with the driving screw 31. When the driving screw 31 rotates, the sleeve 41 can move linearly along the axial direction of the driving screw 31 to move closer to or away from the mounting seat 3.

[0046] In practice, Figure 1As shown in the left and right directions, when the driving screw 31 rotates in one direction to make the sleeve 41 gradually approach the mounting seat 3, that is, move to the right, the sleeve 41 pushes the slider seat 44 and the slider 42 to move together, gradually approaching the mounting seat 3 and compressing the first elastic member 45. At the same time, the pushing portion moves together with the slider 42, gradually approaching the mounting seat 3 and pushing the spline sleeve 11 to move axially to the right relative to the spline shaft 12, so that the spline sleeve 11 is combined with the spline shaft 12. At the same time, in the process of the sleeve 41 pushing the slider seat 44 and the slider 42 to the right to move to the combined position, the splines of the spline sleeve 11 and the splines of the spline shaft 12 will be in a state of facing each other. At this time, the sleeve 41 will still push the slider seat 4 The first elastic member 45 is compressed and continues to move to the combined position, but the slider 42 assembled in the slider seat 44 cannot drive the pusher to move to the combined position. At this time, the second elastic member 46 is compressed by the slider 42 and the slider seat 44 to store force. When the spline sleeve 11 and the spline shaft 12 reach the combined condition again, the second elastic member 46 releases the elastic force, and the elastic force of the second elastic member 46 can be used to continue to push the slider 42 to slide rightward in the slider seat 44 to drive the spline shaft 12 and the spline sleeve 11 to be combined, so that the slider 42 can move to the combined position, thereby ensuring the normal use of the motor of the drive shaft and eliminating the risk of the motor being blocked and damaged due to the failure to be combined in place after the splines are against each other.

[0047] Similarly, when the driving screw 31 rotates in the opposite direction to make the sleeve 41 gradually move away from the mounting seat 3, that is, move to the left, the first elastic member 45 releases the elastic force to push the slider seat 44 and the slider 42 to move together and gradually move away from the mounting seat 3. At the same time, the pushing portion moves together with the slider 42 and gradually moves away from the mounting seat 3 and pushes the spline sleeve 11 to move axially to the left relative to the spline shaft 12, so that the spline sleeve 11 is disconnected from the spline shaft 12, until it moves to the position where the spline sleeve 11 is disconnected from the spline shaft 12.

[0048] It should be noted that the drive shaft disconnect mechanism 101 of this embodiment can be applied to any drive shaft with a spline sleeve and a spline shaft that requires power connection and disconnection, and can also be applied to the connection and disconnection of the auxiliary drive bridge of a four-wheel drive motor vehicle.

[0049] Thus, the rotational motion of the drive screw 31 is converted into the linear motion of the slider 42 and its pushing part through the movable structure 4, and the driving force is transmitted to the spline sleeve 11, so as to realize the connection or disconnection of the spline sleeve 11 and the spline shaft 12. Therefore, the vehicle can be in a connected state in the auxiliary drive bridge four-wheel drive mode through the disconnecting device to ensure sufficient power for the whole vehicle. In the two-wheel drive mode, the vehicle can be in a disconnected state in the two-wheel drive mode through the disconnecting device to interrupt the power of the wheels and the main gear and other rotating parts, so as to avoid the main gear, transmission shaft and other components being driven to rotate during the operation of the vehicle, thereby reducing the energy loss caused by reverse drag. The design of the second elastic member 46 solves the problem that the traditional disconnecting mechanism 101 has no energy storage structure and needs to be used with speed regulation. When switching between two-wheel drive or four-wheel drive when parking, it is easy to get stuck, thereby ensuring the reliability of vehicle operation.

[0050] According to the disconnection mechanism 101 of the drive shaft of the embodiment of the utility model, a driving structure 2, a mounting seat 3 and a movable structure 4 are provided to ensure the normal operation of the disconnection mechanism 101. The rotational motion of the drive screw 31 is converted into the linear motion of the slider 42 and its pushing part through the movable structure 4, and the pushing force of the pushing part is transmitted to the spline sleeve 11, so as to realize the connection or disconnection of the spline sleeve 11 and the spline shaft 12, so that the drive shaft can transmit power or disconnect the transmission of power, so that the vehicle can be in a connected state in the auxiliary drive bridge four-wheel drive mode to ensure sufficient power for the whole vehicle, and can also be in a disconnected state in the two-wheel drive mode to interrupt the power of the wheels and the main gear and other rotating parts, so as to avoid the main gear, the transmission shaft and other components from being driven to rotate during the operation of the vehicle, thereby reducing the energy loss caused by reverse drag. Through the design of the second elastic member 46, the problem that the traditional disconnection mechanism 101 has no energy storage structure and needs to be used with speed regulation, and is prone to jamming when switching between two-wheel drive or four-wheel drive during parking is solved, thereby ensuring the reliability of vehicle operation.

[0051] In some embodiments, the first elastic member 45 is sleeved outside the driving screw rod 31 , and two ends of the first elastic member 45 are respectively against the slider seat 44 and the mounting seat 3 .

[0052] Specifically, the shape and size of the first elastic member 45 are adapted to the shape and size of the driving screw 31, so that the first elastic member 45 can be sleeved outside the driving screw 31. Figure 2-Figure 5As shown, the first elastic member 45 is elastically pressed between the mounting seat 3 and the slider seat 44, with its left end abutting against the right end of the mounting seat 3, and its right end abutting against the left end of the mounting seat 3. With such a configuration, when the driving screw 31 drives the sleeve 41 to move rightward and drives the slider 42 and the slider seat 44 to move rightward, the first elastic member 45 will be compressed and elastically deformed by the pressure of the slider seat 44 and the mounting seat 3. During the gradual movement of the slider seat 44, the degree of compression and deformation of the first elastic member 45 gradually increases, and its elastic force gradually increases. Therefore, when the driving screw 31 drives the sleeve 41 to move leftward, the first elastic member 45 will restore to its initial state and release the elastic force to push the slider 42 and the slider seat 44 to move leftward.

[0053] The second elastic member 46 is sleeved outside the driving screw rod 31 , and two ends of the second elastic member 46 abut against the slider 42 and the slider seat 44 respectively.

[0054] Specifically, the shape and size of the second elastic member 46 are adapted to the shape and size of the driving screw 31, so that the second elastic member 46 can be sleeved outside the driving screw 31. Figure 2-Figure 5 As shown, the second elastic member 46 is elastically pressed between the mounting seat 3 and the slider 42, with its left end abutting against the left end of the mounting seat 3, and its right end abutting against the left end face of the slider 42. The arrangement is such that when the slider 42 slides to the left in the slider seat 44, that is, in practice, due to the abutment of the splines of the spline sleeve 11 and the spline shaft 12, the slider seat 44 is pushed by the shaft sleeve 41 to continue moving to the right, while the slider 42 cannot continue to move to the right. At this time, the second elastic member 46 can be compressed and elastically deformed by the pressure of the slider 42 and the slider seat 44. When the spline sleeve 11 and the spline shaft 12 reach the combination condition again, that is, the splines of the two are meshed with each other, the second elastic member 46 will release the elastic force to push the slider 42 to continue moving to the right, thereby realizing the combination of the spline sleeve 11 and the spline shaft 12.

[0055] In actual design, both the first elastic member 45 and the second elastic member 46 can be constructed as springs.

[0056] In some embodiments, the slider seat 44 is formed with a hollow groove 441 , the driving screw 31 passes through the hollow groove 441 , the slider 42 is installed in the hollow groove 441 , and the second elastic member 46 is pressed between the inner end surface of the hollow groove 441 and the slider 42 .

[0057] Specifically, Figure 5As shown, the slider seat 44 can be constructed as a rectangular block, which is hollow inside and open on the upper side to form a hollow groove 441. The left and right end faces of the slider seat 44 are both provided with second holes for the drive screw 31 to pass through, so that the drive screw 31 can pass through the left end face, through the hollow groove 441 and through the right end face, and then be threadedly connected with the sleeve 41. Among them, the slider 42 is constructed as a rectangular block and installed in the hollow groove 441. The front and rear end faces of the slider seat 44 are partially opened so that the slider 42 can slide in the hollow groove 441 along the opening. It can be understood that the length of the opening is the sliding range of the slider 42.

[0058] The left end of the second elastic member 46 elastically presses against the left inner end surface of the hollow groove 441, and the right end of the second elastic member 46 elastically presses against the slider 42. Figure 5 As shown, when the slider 42 slides to the left in the hollow groove 441 relative to the slider seat 44, the second elastic member 46 can be compressed. When the second elastic member 46 releases the elastic force, it pushes the slider 42 to slide to the right in the hollow groove 441 relative to the slider seat 44 until it abuts against the right inner end surface of the slider seat 44.

[0059] In some embodiments, the disconnecting mechanism 101 of the drive shaft also includes a limit block 5, which is spaced apart from and relatively distributed on the mounting seat 3, one end of the drive screw 31 is rotatably inserted into the mounting seat 3, and the other end of the drive screw 31 is rotatably inserted into the limit block 5, and the sleeve 41 is limited and pressed against the limit block 5 when it moves in a direction away from the mounting seat 3 to the maximum position.

[0060] Specifically, the limit block 5 is used to limit the movement range of the movable structure 4, prevent the sleeve 41, the slider 42 and the sliding seat from exceeding the predetermined movement range, and enable the driving screw 31 to rotate stably. Figure 2-Figure 4 As shown, the limit block 5 is spaced apart from the mounting seat 3 and relatively distributed at the left and right ends of the driving screw 31. The limit block 5 is located at the left end of the driving screw 31, and the mounting seat 3 is located at the right end of the driving screw 31. A third through hole is provided on the limit block 5 so that the left end of the driving screw 31 can be passed through the limit block 5 and can rotate in the limit block 5, and the right end can rotate in the mounting seat 3. In this way, the two ends of the driving screw 31 can be fixed and can rotate stably.

[0061] In practice, when the sleeve 41 moves to the left under the drive of the driving screw 31 until it contacts the limit block 5, it will no longer move. At this time, it is the maximum movement displacement of the sleeve 41, which can improve the movement accuracy of the disconnection mechanism 101 and smoothly realize the disconnection of the spline sleeve 11 and the spline shaft 12.

[0062] In some embodiments, the driving structure 2 includes a driving member and a gear set 22 . The gear set 22 is connected to the driving member and the driving screw 31 , respectively. The driving member is suitable for driving the driving screw 31 to rotate through the gear set 22 .

[0063] Specifically, the driving member is the power source of the disconnecting mechanism 101, providing rotational power to the driving screw 31. In practice, the driving member drives the gear set 22 to rotate, and the gear set 22 drives the driving screw 31 to rotate, thereby transmitting the power to the driving screw 31 through the gear set 22, and then to the movable structure 4, thereby realizing the transmission of power.

[0064] In some embodiments, the gear set 22 includes an input gear 221, a first transmission gear 222, a second transmission gear and an output gear 224. The first transmission gear 222 and the second transmission gear are coaxially arranged, that is, power transmission from the driving member to the driving screw 31 is realized through the input gear 221, the first transmission gear 222, the second transmission gear and the output gear 224.

[0065] The input gear 221 is connected to the output end of the driving member, the input gear 221 is meshed with the first transmission gear 222 , the second transmission gear is meshed with the output gear 224 , and the output gear 224 is fixedly sleeved outside the driving screw 31 .

[0066] Specifically, Figure 1 As shown, the gear set 22 includes an input gear 221, a first transmission gear 222, a second transmission gear and an output gear 224. The first transmission gear 222 and the second transmission gear, the driving member is arranged above the movable structure 4, the input gear 221 and the output end of the driving member, the first transmission gear 222 and the second transmission gear are coaxially arranged below the input gear 221, and the input gear 221 is meshed with the first transmission gear 222, the output gear 224 is fixedly sleeved on the outer side of the right end of the driving screw 31, and the second transmission gear is meshed with the output gear 224, thereby, the output end of the driving member outputs power, and transmits the power to the input gear 221 to drive the input gear 221 to rotate, the rotation of the input gear 221 drives the first transmission gear 222 and the second transmission gear to rotate, and at the same time, the rotation of the second transmission gear drives the output gear 224 to rotate, and the rotation of the output gear 224 then drives the driving screw 31 to rotate synchronously, thereby realizing the power transmission from the driving member to the driving screw 31, so as to drive the driving screw 31 to rotate and improve the transmission efficiency.

[0067] In some embodiments, the driving member is constructed as a driving motor 21, the motor shaft 211 of the driving motor 21 and the driving screw 31 are parallel and spaced apart and respectively penetrate the mounting seat 3, the driving motor 21 and the movable structure 4 are both located on the same side of the mounting seat 3, and the gear set 22 is located on the other side of the mounting seat 3.

[0068] Specifically, Figure 1 As shown, the driving member is constructed as a driving motor 21, which is installed above the movable structure 4. The driving motor 21 is provided with a motor shaft 211. The input gear 221 is sleeved on the outside of the motor shaft 211 to rotate synchronously with the motor shaft 211. The motor shaft 211 and the driving screw 31 of the driving motor 21 are parallel and spaced apart in the up and down directions and are respectively penetrated through the upper and lower parts of the mounting seat 3. The motor shaft 211 of the driving motor 21 is penetrated through the upper part of the mounting seat 3, and the driving screw 31 is penetrated through the lower part of the mounting seat 3. In this way, installation space is reserved for the gear set 22, and the gear set 22 can be flexibly arranged to realize power transmission. At the same time, a stable support structure is also provided for the gear set 22 to achieve higher transmission efficiency and reliability.

[0069] The driving motor 21 and the movable structure 4 are both located on the left side of the mounting base 3, and the gear set 22 is located on the right side of the mounting base 3. As a result, the driving motor 21, the movable structure 4 and the gear set 22 are arranged in reasonable positions, which improves the compactness of the disconnecting mechanism 101 of the driving shaft, saves installation space, and improves the stability of the overall structure.

[0070] In some embodiments, the pushing portion is configured as a pushing column 43 , which is protruding from the surface of the slider 42 and is formed with a pushing end 431 , and the pushing end 431 extends out of the slider seat 44 to cooperate with the spline sleeve 11 .

[0071] Specifically, Figure 1 As shown, a portion of the lower surface of the slider 42 protrudes to form a push column 43, and the push column 43 extends to the outside of the slider seat 44. A push end 431 is formed at the lower end of the push column 43. Two spaced-apart protruding ends 111 are arranged on the outer peripheral wall of the spline sleeve 11, and the distance between the two protruding ends 111 is the size of the push column 43, so that the push end 431 can extend between the two protruding ends 111 and be clamped therein. Therefore, when the push end 431 moves, the spline sleeve 11 can be pushed to move to achieve separation and combination with the spline shaft 12.

[0072] The utility model also provides a drive shaft assembly 100 .

[0073] According to the embodiment of the utility model, the drive shaft assembly 100 includes a spline shaft 12, a spline sleeve 11 and a disconnecting mechanism 101 of the drive shaft of any of the above embodiments, the spline sleeve 11 is sleeved on the outside of the spline shaft 12, the pushing portion is suitable for pushing the spline sleeve 11 to move in a first direction relative to the spline shaft 12 so that the spline sleeve 11 and the spline shaft 12 are circumferentially transmitted, and is suitable for pushing the spline sleeve 11 to move in a second direction relative to the spline shaft 12 so that the spline sleeve 11 and the spline shaft 12 are circumferentially unlocked, the first direction is opposite to the second direction, that is, the first direction and the second direction are two opposite axial directions of the spline sleeve 11 and the spline shaft 12.

[0074] Specifically, Figure 1 As shown, the drive shaft assembly 100 includes a spline shaft 12, a spline sleeve 11 and a disconnecting mechanism 101 of the drive shaft. The disconnecting mechanism 101 is used to realize the connection or disconnection between the spline shaft and the spline sleeve 11, that is, the spline sleeve 11 and the spline shaft 12 can be circumferentially transmitted or circumferentially unlocked. The spline sleeve 11 is sleeved outside the spline shaft 12, and the first direction and the second direction are the left and right directions shown in the figure. The pushing part can push the spline sleeve 11 to move leftward relative to the spline shaft 12 so that the inner spline of the spline sleeve 11 is engaged with the outer spline of the spline shaft 12, thereby realizing the circumferential transmission of the spline sleeve 11 and the spline shaft 12, so that the drive shaft can transmit torque and power. The pushing part can also push the spline sleeve 11 to move rightward relative to the spline shaft 12 so that the inner spline of the spline sleeve 11 is separated from the outer spline of the spline shaft 12, which is in a non-engaged state, thereby realizing the circumferential unlocking of the spline sleeve 11 and the spline shaft 12 and disconnecting the power transmission of the drive shaft.

[0075] The utility model also provides a vehicle.

[0076] The vehicle according to the embodiment of the present utility model is provided with the above-mentioned drive shaft assembly 100 .

[0077] According to the vehicle of the embodiment of the utility model, a driving structure 2, a mounting seat 3 and a movable structure 4 are provided to ensure the normal operation of the disconnection mechanism 101. The rotational motion of the driving screw 31 is converted into the linear motion of the slider 42 and its pushing part through the movable structure 4, and the pushing force of the pushing part is transmitted to the spline sleeve 11, so as to realize the connection or disconnection of the spline sleeve 11 and the spline shaft 12, so that the driving shaft can transmit power or disconnect the transmission of power, so that the vehicle can be in a connected state in the auxiliary drive bridge four-wheel drive mode to ensure sufficient power for the whole vehicle, and the vehicle can be in a disconnected state in the two-wheel drive mode to interrupt the power of the wheels and the main gear and other rotating parts, so as to avoid the main gear, the transmission shaft and other components being driven to rotate during the operation of the vehicle, thereby reducing the energy loss caused by reverse drag. Through the design of the second elastic member 46, the problem that the traditional disconnection mechanism 101 has no energy storage structure and needs to be used with speed regulation, and is prone to jamming when switching between two-wheel drive or four-wheel drive during parking is solved, thereby ensuring the reliability of vehicle operation.

[0078] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0079] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A drive shaft disconnection mechanism, characterized in that: The drive shaft comprises a spline sleeve and a spline shaft, wherein the spline sleeve is sleeved outside the spline shaft, and the disconnection mechanism comprises: A driving structure and a mounting seat, wherein the driving structure comprises a driving screw rotatably disposed through the mounting seat; A movable structure, the movable structure includes a sleeve, a slider and a slider seat which are sleeved outside the driving screw, the slider seat is located between the sleeve and the mounting seat, a first elastic member is elastically pressed between the slider seat and the mounting seat, the sleeve and the driving screw thread cooperate to move closer to or away from the mounting seat, the slider is slidably installed on the slider seat, a second elastic member is elastically pressed between the side of the slider facing the sleeve and the slider seat, and the slider is provided with a pushing portion for pushing the spline sleeve to move axially relative to the spline shaft.

2. The disconnection mechanism of the drive shaft according to claim 1, characterized in that: The first elastic member is sleeved outside the driving screw, and two ends of the first elastic member are respectively against the slider seat and the mounting seat; And / or, the second elastic member is sleeved outside the driving screw, and two ends of the second elastic member are respectively against the sliding block and the sliding block seat.

3. The disconnection mechanism of the drive shaft according to claim 1, characterized in that: The slider seat is formed with a hollow groove, the driving screw rod passes through the hollow groove, the slider is installed in the hollow groove, and the second elastic member is pressed between the inner end surface of the hollow groove and the slider.

4. The disconnection mechanism of the drive shaft according to claim 1, characterized in that: It also includes a limit block, which is spaced apart from and relatively distributed to the mounting seat, one end of the drive screw is rotatably inserted into the mounting seat, and the other end of the drive screw is rotatably inserted into the limit block, and the sleeve is limited and pressed against the limit block when it moves in a direction away from the mounting seat to a maximum position.

5. The disconnection mechanism of the drive shaft according to any one of claims 1 to 4, characterized in that: The driving structure includes a driving member and a gear set, wherein the gear set is connected to the driving member and the driving screw rod respectively, and the driving member is suitable for driving the driving screw rod to rotate through the gear set.

6. The disconnection mechanism of the drive shaft according to claim 5, characterized in that: The gear set comprises an input gear, a first transmission gear, a second transmission gear and an output gear, wherein the first transmission gear and the second transmission gear are coaxially arranged; Wherein, the input gear is connected to the output end of the driving member, the input gear is meshed with the first transmission gear, the second transmission gear is meshed with the output gear, and the output gear is fixedly sleeved outside the driving screw.

7. The disconnection mechanism of the drive shaft according to claim 5, characterized in that: The driving member is configured as a driving motor, a motor shaft of the driving motor and the driving screw being spaced apart in parallel and respectively passing through the mounting seat, the driving motor and the movable structure being both located on the same side of the mounting seat, and the gear set being located on the other side of the mounting seat.

8. The disconnection mechanism of the drive shaft according to any one of claims 1 to 4, characterized in that: The pushing portion is configured as a pushing column, which is protrudingly arranged on the surface of the slider and is formed with a pushing end, and the pushing end extends out of the slider seat to cooperate with the spline sleeve.

9. A drive shaft assembly, characterized in that: A disconnect mechanism comprising a spline shaft, a spline sleeve and a drive shaft according to any one of claims 1 to 8, wherein the spline sleeve is arranged outside the spline shaft, and the pushing portion is suitable for pushing the spline sleeve to move in a first direction relative to the spline shaft so that the spline sleeve and the spline shaft can be circumferentially transmitted, and is suitable for pushing the spline sleeve to move in a second direction relative to the spline shaft so that the spline sleeve and the spline shaft can be circumferentially unlocked, and the first direction is opposite to the second direction.

10. A vehicle, characterized in that: A drive shaft assembly as claimed in claim 9 is provided.

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