Power transmission device and vehicle

Abstract

The utility model relates to the technical field of vehicle transmission, and provides a power transmission device and a vehicle. The power transmission device comprises an input shaft connected with a half axle gear, an output shaft sleeve arranged corresponding to the input shaft in the axial direction of the input shaft, and a first joint assembly and / or a second joint assembly arranged on the input shaft. The first joint assembly comprises a first joint sleeve arranged on the input shaft in a sliding mode, and the first joint sleeve is driven to move in the axial direction of the input shaft and can be in transmission connection with the output shaft sleeve or disengaged from the output shaft sleeve. The second joint assembly comprises a second joint sleeve arranged on the input shaft in a sliding mode, and the second joint sleeve is driven to move in the axial direction of the input shaft and can be in transmission connection with the device shell or disengaged from the device shell. The power transmission device disclosed by the utility model not only integrates differential, disconnecting and locking functions, but also is high in reliability, so that the transmission performance of the whole vehicle can be improved.

Description

[0001] The utility model claims the priority of the patent application with the application number 202520349247.8, the patent application name "power transmission device and vehicle" submitted to the China Patent Bureau on February 28, 2025, and the entire content thereof is incorporated herein by reference. TECHNICAL FIELD

[0002] The utility model relates to vehicle transmission technical field, especially a kind of power transmission device.The utility model further relates to a kind of vehicle with the power transmission device. BACKGROUND

[0003] The current hybrid vehicle transmission system is mostly all-wheel drive system (AWD), and all wheels of the vehicle are involved in vehicle driving. Some vehicles are front-wheel drive, and some vehicles are rear-wheel drive. Taking a front-wheel drive vehicle as an example, the front axle engine serves as the main power source, and the rear axle is provided with a P4 (Position 4) motor as auxiliary drive. To reduce energy consumption, improve vehicle range, reduce motor loss, improve inverter life, reduce component wear, and improve vehicle NVH performance, an all-wheel drive system (AWD) vehicle is provided with a disconnect device.

[0004] In addition, as consumers increasingly demand off-road performance from vehicles, whether it is to deal with complex road conditions during light off-road driving or to challenge extreme terrain during heavy off-road driving, it has become a necessary condition for vehicles to have a differential lock function. In view of this market demand for improving the vehicle's ability to escape from extreme conditions, developing a device that can integrate a differential lock and a disconnect mechanism has undoubtedly broad application prospects.

[0005] However, in terms of the current technical situation, the disconnect mechanism and the differential lock are mostly independent of each other in vehicle design. Specifically, the main components used by the disconnect mechanism include dog-tooth structures and one-way clutch structures. The execution mode is more diverse, usually relying on the power generated by the motor, the precise control of electromagnetic force, the strong thrust of pneumatic devices, or the stable pressure of hydraulic systems to drive key components such as worm gears, ball screws, and cams. Then, according to the power source adapted to different vehicle models and the actual execution components selected, flexible and diverse combination designs are made to meet the driving needs of vehicles in different conditions.

[0006] On the other hand, the more common design schemes for differential locks mainly include two types: one is a mechanical structure that uses a yoke and dog teeth to work closely together. By precisely actuating the yoke, the dog teeth are engaged and separated, thereby controlling the opening and closing of the differential lock. The other is a mode that uses an electromagnet and dog teeth to work together. By using the strong attraction of the electromagnet after being electrified, the dog teeth are quickly driven to perform the corresponding action, achieving effective implementation of the differential lock function.

[0007] Unfortunately, due to the technical complexity and the limitation of space layout and other factors, it is difficult to simultaneously achieve the functions of disconnecting and differential lock on the same vehicle at the present stage, and it is often difficult to achieve the ideal synergistic effect. This not only leads to the single function of the differential system in most existing drive systems or transmission systems, only with differential function, which is difficult to meet the dual needs of complex road conditions and energy saving and efficient, but also when the differential lock is equipped in the strong off-road vehicle and the disconnecting device is equipped in the high transmission efficiency vehicle, the integration degree is not high, which cannot simultaneously improve the energy saving performance of the vehicle, so that the adaptability of the vehicle in different working conditions is greatly reduced. Therefore, how to break through the existing technical bottleneck and create a differential system with multi-function, high integration and high reliability has become an important task to be overcome in the automobile industry. Practical new type content

[0008] Therefore, the utility model aims at providing a power transmission device which not only integrates differential, disconnecting and locking functions, but also has higher device reliability.

[0009] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0010] A power transmission device, comprising a device housing, a half shaft gear arranged in the device housing, an input shaft connected with the half shaft gear, an output shaft sleeve arranged corresponding to the input shaft in the axial direction of the input shaft, and a first engagement assembly and / or a second engagement assembly arranged on the input shaft;

[0011] The first engagement assembly comprises a first engagement sleeve slidingly arranged on the input shaft, the first engagement sleeve is driven to move in the axial direction of the input shaft, and can establish a transmission connection with the output shaft sleeve or disconnect the transmission connection between the output shaft sleeve;

[0012] The second engagement assembly comprises a second engagement sleeve slidingly arranged on the input shaft, the second engagement sleeve is driven to move in the axial direction of the input shaft, and can establish a transmission connection with the device housing or disconnect the transmission connection between the device housing.

[0013] Further, a first housing is arranged at a distance from the device housing, and the first engagement assembly and the second engagement assembly are arranged on the input shaft at the same time; the output shaft sleeve is rotatably arranged in the first housing, the first engagement assembly and the second engagement assembly are located in the first housing, and the second engagement assembly is located between the first engagement assembly and the device housing.

[0014] Further, a first casing is arranged at a distance from the device housing, and the output shaft sleeve is arranged to rotate in the first casing; the first engaging assembly is arranged on the input shaft and located in the first casing, or the second engaging assembly is arranged on the input shaft and located in the first casing.

[0015] Further, the first engaging assembly further comprises a first driving member connected in transmission with the first engaging sleeve to drive the first engaging sleeve to move axially along the input shaft; and the second engaging assembly further comprises a second driving member connected in transmission with the second engaging sleeve to drive the second engaging sleeve to move axially along the input shaft.

[0016] Further, the first engaging sleeve and the second engaging sleeve are each provided with a magnetic body, and the first driving member and the second driving member each comprise an electromagnetic coil arranged on the first casing.

[0017] Further, along the axial direction of the input shaft, the magnetic body is located on one side of the electromagnetic coil; or, along the radial direction of the input shaft, the magnetic body is located between the electromagnetic coil and the input shaft.

[0018] Further, the input shaft is slidably provided with a magnetic shielding cover corresponding to each magnetic body, and the magnetic body is arranged on the magnetic shielding cover; and / or the electromagnetic coil is arranged in the first casing through a second casing, and an abutting portion is arranged on the second casing, and the abutting portion is used to be attracted together with the magnetic body and limit the movement stroke of the magnetic body.

[0019] Further, the second casing is provided with clamping members on both sides in the axial direction of the input shaft, and the second casing is arranged on the first casing through the clamping members on both sides; or, the first casing is provided with a shoulder on the inner wall, and a clamping member is arranged at a distance from the shoulder, and the second casing is arranged between the shoulder and the clamping member.

[0020] Further, the first engaging assembly further comprises a first elastic member arranged between the input shaft and the first engaging sleeve, the first engaging sleeve is in transmission connection with the output shaft sleeve, and when the first engaging sleeve is driven to move axially along the input shaft, the first elastic member can be compressed and moved away from the output shaft sleeve.

[0021] Further, the input shaft is provided with a shaft shoulder, one end of the first elastic member is connected with the shaft shoulder, and the other end of the first elastic member is connected with the first engaging sleeve.

[0022] Further, the second joint assembly further comprises a second elastic member arranged between the input shaft and the second joint sleeve, and when the second joint sleeve is driven to move axially along the input shaft, the second elastic member can be compressed to be close to and drivingly connected with the device housing.

[0023] Further, the input shaft is provided with a detachable stopper, one end of the second elastic member is connected with the stopper, and the other end of the second elastic member is connected with the second joint sleeve.

[0024] Further, the input shaft is provided with the second joint assembly; one side of the device housing facing the output shaft sleeve is provided with a connecting shaft, the input shaft passes through the shaft hole of the connecting shaft and is drivingly connected with the output shaft sleeve, and the second joint sleeve is drivingly connected with the device housing through the connecting shaft.

[0025] Compared with the prior art, the power transmission device has the following advantages:

[0026] The power transmission device is based on the cooperation of the first joint assembly and the second joint assembly, and can realize coaxial arrangement of the first joint sleeve and the second joint sleeve, facilitate positioning movement of the two joint sleeves, and further facilitate improvement of transmission reliability of the two joint sleeves, and when serving as a differential assembly, the differential function can be realized through driving connection of the first joint sleeve and the output shaft sleeve, and the disconnection function can be realized through disengagement of the first joint sleeve and the output shaft sleeve, so as to reduce energy loss, and at the same time, the locking function can be realized through driving connection of the first joint sleeve and the output shaft sleeve and driving connection of the second joint sleeve and the device housing, the off-road escape ability of the vehicle is improved, and the driving performance of the whole vehicle is improved, so as to facilitate improvement of the product quality of the power transmission device.

[0027] At the same time, when the power transmission device of the utility model serves as a differential assembly and is provided only with the first joint assembly, the differential function can be realized through driving connection of the first joint sleeve and the output shaft sleeve, and the disconnection function can be realized through disengagement of the first joint sleeve and the output shaft sleeve, so as to reduce energy loss, and thus, not only can the selection function of the power transmission device be realized, but also the needs of customers for the vehicle power type only requiring the differential function and the disconnection function can be met, and cost reduction is facilitated. Similarly, when the power transmission device of the utility model serves as a differential assembly and is provided only with the second joint assembly, the locking function can be realized through driving connection of the second joint sleeve and the device housing, and the off-road escape ability of the vehicle is improved, and thus, not only can the selection function of the power transmission device be realized, but also the needs of customers for the vehicle power type only requiring the differential function and the locking function can be met, and cost reduction is facilitated.

[0028] In addition, by arranging the first shell, the output shaft sleeve, the first engaging assembly and the second engaging assembly can be arranged and installed, and the overall layout rationality of the power transmission device is improved. By driving the first engaging sleeve by the first driving member and driving the second engaging sleeve by the second driving member, the two engaging sleeves can be controlled separately, and the control reliability of the two engaging sleeves is improved. By using the structure of the magnetic body and the electromagnetic coil, the electromagnetic force driving mode is used to improve the precise control of the magnetic body movement, so that the precise control of the movement of the first engaging sleeve and the second engaging sleeve is realized.

[0029] In addition, along the input shaft in the axial direction, the magnetic body is located on the side of the corresponding electromagnetic coil, which not only facilitates the arrangement and installation of the magnetic body and the corresponding electromagnetic coil, improves the maintenance convenience, but also facilitates the heat dissipation of the electromagnetic coil and improves the service life. By arranging the magnetic body between the electromagnetic coil and the input shaft in the radial direction of the input shaft, the magnetic driving force acting on the magnetic body and the stability of the magnetic driving force can be improved, and high-precision control can be realized. By arranging the magnetic shield, the interference of the external stray magnetic field on the magnetic body driving can be prevented, and the precision of the magnetic body driving is improved. By arranging the abutting portion, the adsorption effect of the magnetic body can be improved, and the movement stroke of the magnetic body can be limited, and the driving reliability of the magnetic body is improved, so that the use reliability of the engaging sleeve is improved.

[0030] In addition, the second shell is arranged on the first shell through the two side clamping members, or the second shell is arranged between the stop shoulder and the clamping member, so that the second shell can be conveniently disassembled, that is, the electromagnetic coil can be disassembled. By arranging the shaft shoulder, the installation and arrangement of the first elastic member are facilitated, and by arranging the detachable stop member, the installation and arrangement of the second elastic member are facilitated. The arrangement of the connecting shaft can make the arrangement of the device shell, the input shaft, the second engaging assembly and other related components more reasonable, and the transmission connection between the second engaging sleeve and the device shell is realized.

[0031] Another purpose of the utility model is to provide a vehicle, the vehicle is equipped with the power transmission device as described above.

[0032] The vehicle described in the utility model is equipped with the power transmission device described above, when the power transmission device is used as a differential assembly, the differential, disconnection and locking functions can be realized, and the use reliability is high, so that the vehicle transmission performance can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0033] The drawings that constitute a part of the utility model are used to provide a further understanding of the utility model, the illustrative embodiment of the utility model and the explanation thereof are used to explain the utility model, and do not constitute undue limitation on the utility model. In the drawings:

[0034] Figure 1The overall structural schematic diagram of the power transmission device of the first example according to the embodiment of the utility model;

[0035] Figure 2 The structural schematic diagram of the device shell, the input shaft and the connecting shaft during assembly according to the embodiment of the utility model;

[0036] Figure 3 The structural schematic diagram of the input shaft, the output shaft sleeve and the first shell during assembly according to the embodiment of the utility model;

[0037] Figure 4 The structural schematic diagram of the device shell, the input shaft and the connecting shaft during assembly according to the embodiment of the utility model; Figure 3 The enlarged view of A in the figure;

[0038] Figure 5 The enlarged view of B in the figure; Figure 3 The enlarged view of B in the figure;

[0039] Figure 6 The force transmission schematic diagram of the power transmission device of the first example according to the embodiment of the utility model in the disconnect mode;

[0040] Figure 7 The force transmission schematic diagram of the power transmission device of the first example according to the embodiment of the utility model in the differential mode;

[0041] Figure 8 The force transmission schematic diagram of the power transmission device of the first example according to the embodiment of the utility model in the lock mode;

[0042] Figure 9 The structural schematic diagram of the power transmission device of the second example according to the embodiment of the utility model;

[0043] Figure 10 The structural schematic diagram of the power transmission device of the third example according to the embodiment of the utility model;

[0044] Explanation of reference signs:

[0045] 10, device shell; 11, half shaft gear; 12, planetary gear; 13, planetary shaft; 14, input shaft; 141, shaft shoulder; 142, blocking piece; 143, first spline; 144, second spline; 15, connecting shaft; 16, third bearing;

[0046] 20, first shell; 21, output shaft sleeve; 211, first bearing; 22, second bearing; 23, blocking shoulder; 24, clamping piece;

[0047] 30a, first joint assembly; 30b, second joint assembly; 31a, first joint sleeve; 31b, second joint sleeve; 311, magnetic body; 312, magnetic shield; 32a, first driving member; 32b, second driving member; 321, second housing; 3211, abutting portion; 322, electromagnetic coil; 33a, first elastic member; 33b, second elastic member. DETAILED DESCRIPTION

[0048] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0049] In the following description, specific details are set forth in order to provide a thorough understanding of embodiments of the application. However, persons having ordinary skill in the art will appreciate that embodiments of the application can be practiced without the specific details, and that the present application is not limited to the details by the description.

[0050] In the description of the present application, it should be noted that if the terms indicating the orientation or position relationship such as "upper", "lower", "inner", "outer" and the like appear, they are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the present application in that the devices or elements indicated must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation of the present application. In addition, if the terms "first", "second" and the like appear, they are also only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0051] In addition, in the description of the present application, unless otherwise explicitly limited, the terms "mounting", "connection", "connection", "connection" should be understood broadly. For example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood in combination with the specific circumstances.

[0052] The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0053] Embodiment one

[0054] The present embodiment relates to a power transmission device, which is particularly suitable for being used as a differential assembly and has higher transmission reliability, so as to solve the problems of single function and low transmission reliability of the differential system in the prior art.

[0055] And, the power transmission device of the embodiment can not only simultaneously integrate differential, disconnecting and locking functions, but also only have differential and disconnecting functions, or only have differential and locking functions, to realize the optional setting of the power transmission device, so as to facilitate the optional setting of the vehicle power type to meet the needs of different customers.

[0056] In terms of overall structure, the power transmission device of the embodiment comprises a device housing 10, a half shaft gear 11 arranged in the device housing 10, an input shaft 14 connected with the half shaft gear 11, and an output shaft sleeve 21 arranged in the device housing 10 and corresponding to the input shaft 14 in the axial direction of the input shaft 14. The input shaft 14 is provided with a first engagement assembly 30a, or the input shaft 14 is provided with a second engagement assembly 30b, or the input shaft 14 is provided with the first engagement assembly 30a and the second engagement assembly 30b.

[0057] And, the first engagement assembly 30a comprises a first engagement sleeve 31a slidingly arranged on the input shaft 14, which is driven to move axially along the input shaft 14 to establish a transmission connection with the output shaft sleeve 21 or to disconnect the transmission connection between the output shaft sleeve 21. The second engagement assembly 30b comprises a second engagement sleeve 31b slidingly arranged on the input shaft 14, which is driven to move axially along the input shaft 14 to establish a transmission connection with the device housing 10 or to disconnect the transmission connection between the device housing 10.

[0058] At this time, as arranged above, the power transmission device of the embodiment has three configurations, the first of which is that the input shaft 14 is provided with the first engagement assembly 30a and the second engagement assembly 30b at the same time; the second of which is that the input shaft 14 is provided with only the first engagement assembly 30a; and the third of which is that the input shaft 14 is provided with only the second engagement assembly 30b.

[0059] In detail, in the first case (the input shaft 14 is provided with the first engagement assembly 30a and the second engagement assembly 30b at the same time), the power transmission device can simultaneously integrate differential, disconnecting and locking functions when it is used as a differential assembly (at this time, as described below, the device housing 10 is a differential housing). Specifically, the power transmission device can realize differential function when the first engagement sleeve 31a establishes a transmission connection with the output shaft sleeve 21 (at this time, the second engagement sleeve 31b is disconnected from the device housing 10), and can realize disconnecting function by disconnecting the transmission connection between the first engagement sleeve 31a and the output shaft sleeve 21 (at this time, the second engagement sleeve 31b is disconnected from the device housing 10), so as to reduce energy loss. At the same time, the power transmission device can also realize locking function by establishing transmission connection between the first engagement sleeve 31a and the output shaft sleeve 21, and establishing transmission connection between the second engagement sleeve 31b and the device housing 10, so as to improve the off-road escape ability of the vehicle and improve the driving performance of the vehicle.

[0060] In the second case (only the first engagement assembly 30a is arranged on the input shaft 14), the power transmission device, when serving as a differential assembly, can have differential and disengagement functions, specifically: the power transmission device can realize the differential function by establishing a transmission connection between the first engagement sleeve 31a and the output shaft sleeve 21, and can realize the disengagement function by disengaging the transmission connection between the first engagement sleeve 31a and the output shaft sleeve 21, so as to reduce energy loss.

[0061] In the third case (only the second engagement assembly 30b is arranged on the input shaft 14), the power transmission device, when serving as a differential assembly, can have differential and locking functions, specifically: the power transmission device can realize the locking function by establishing a transmission connection between the second engagement sleeve 31b and the device housing 10, so as to improve the off-road escape ability of the vehicle and improve the driving performance of the vehicle. At this time, it should be noted that the above-mentioned output shaft sleeve 21 is arranged in correspondence with the input shaft 14 in the axial direction of the input shaft 14, which can be understood as that the output shaft sleeve 21 corresponds to and is in transmission connection with the input shaft 14, and in specific implementation, the output shaft sleeve 21 is preferably arranged to be fixedly connected with the input shaft 14, based on which, the differential function of the power transmission device can be realized when the second engagement sleeve 31b is disengaged from the transmission connection with the device housing 10, and the locking function can be realized when the second engagement sleeve 31b establishes a transmission connection with the device housing 10.

[0062] Based on the above, in detail, in the embodiment, in specific implementation, the power transmission device, in addition to serving as a differential assembly, can also serve as other transmission systems that require disengagement and locking functions, except that the arrangement position and form of the half shaft gear 11 in the device housing 10 need to be adaptively adjusted when serving as other transmission systems. In order to clearly describe the power transmission device of the embodiment, the embodiment mainly takes the specific example of the power transmission device serving as a differential assembly for introduction, and the related structures not mentioned in the differential assembly in the embodiment can be referred to the differential system well known to those skilled in the art, which will not be described hereinafter.

[0063] Moreover, it should be noted that when the power transmission device of the embodiment serves as a differential assembly, the device housing 10 is a differential housing, and the differential housing has the planetary shaft 13, the planetary gear 12 and the above-mentioned half shaft gear 11, and the half shaft gear 11 is usually two oppositely arranged half shaft gears for transmitting power to the half shafts of the opposite two wheels (left front wheel and right front wheel, or left rear wheel and right rear wheel).

[0064] That is, in the actual application of the vehicle, corresponding to the two half-shaft gears 11 (or corresponding to the two wheels), the input shaft 14, output shaft sleeve 21, first engagement component 30a and second engagement component 30b in the power transmission device of this embodiment are all arranged in two sets with the left and right sides facing each other. Thus, when the first engagement sleeve 31a is connected to the output shaft sleeve 21, it can realize the function of differential speed relative to the two wheels. When the first engagement sleeve 31a is disengaged from the output shaft sleeve 21, it can realize the function of disconnecting the transmission of power from the two half-shaft gears 11 to the half-shaft of the corresponding wheel (e.g., four-wheel drive to front-wheel drive) to reduce energy loss. Furthermore, when the first engagement sleeve 31a is connected to the output shaft sleeve 21 and the second engagement sleeve 31b is connected to the device housing 10, it can realize the locking function, so that the two half-shaft gears 11 are synchronously driven, thereby realizing the synchronous rotation of the half-shafts of the two wheels and improving the vehicle's off-road escape ability.

[0065] Furthermore, it should be noted that the direction-related descriptions in this embodiment are merely illustrative examples. In actual implementation, the direction descriptions in this embodiment will vary depending on the orientation of the input shaft 14. That is, each direction in this embodiment refers to a relative coordinate system with the input shaft 14 as the reference, in order to clearly and concisely explain the relevant examples of the power transmission device in this embodiment.

[0066] When the power transmission device in this embodiment is used as a differential assembly, it can integrate differential, disconnect, and lock functions. In some exemplary embodiments, such as... Figures 1 to 8 As shown, the power transmission device of this embodiment includes a device housing 10, a half-shaft gear 11 disposed in the device housing 10, an input shaft 14 connected to the half-shaft gear 11, an output shaft sleeve 21 disposed axially along the input shaft 14 and corresponding to the input shaft 14, and a first engagement component 30a and a second engagement component 30b disposed on the input shaft 14.

[0067] Furthermore, the first engagement assembly 30a includes a first engagement sleeve 31a slidably disposed on the input shaft 14, and a first elastic member 33a disposed between the input shaft 14 and the first engagement sleeve 31a. The first engagement sleeve 31a is drive-connected to the output shaft sleeve 21, and when the first engagement sleeve 31a is driven to move axially along the input shaft 14, it can compress the first elastic member 33a and move away from the output shaft sleeve 21. The second engagement assembly 30b includes a second engagement sleeve 31b slidably disposed on the input shaft 14, and a second elastic member 33b disposed between the input shaft 14 and the second engagement sleeve 31b. When the second engagement sleeve 31b is driven to move axially along the input shaft 14, it can compress the second elastic member 33b to approach and drive the connection device housing 10.

[0068] At this time, as set above, based on the matching arrangement of the first engagement assembly 30a and the second engagement assembly 30b, the coaxial arrangement of the first engagement sleeve 31a and the second engagement sleeve 31b can be achieved, which is beneficial to realize the positioning movement of the two engagement sleeves, and thus is beneficial to improve the transmission reliability of the two, and when serving as a differential assembly, the differential function can be realized through the transmission connection between the first engagement sleeve 31a and the output shaft sleeve 21, and the disconnection function can be realized through the disengagement between the first engagement sleeve 31a and the output shaft sleeve 21, so as to reduce the energy loss, at the same time, the locking function can also be realized through the transmission connection between the first engagement sleeve 31a and the output shaft sleeve 21, and the transmission connection between the second engagement sleeve 31b and the device housing 10, so as to improve the off-road escape ability of the vehicle and improve the driving performance of the whole vehicle. Thus, the power transmission device, when serving as a differential assembly, integrates the differential, disconnection and locking functions.

[0069] In the embodiment, as a preferred implementation form, referring to Figure 1 and Figure 3 , the power transmission device further comprises a first housing 20 which is arranged at an axial distance from the device housing 10 along the input shaft 14. At the same time, the output shaft sleeve 21 is rotatably arranged in the first housing 20, the first engagement assembly 30a and the second engagement assembly 30b are both located in the first housing 20, and the second engagement assembly 30b is located between the first engagement assembly 30a and the device housing 10. In this way, the arrangement and installation of the output shaft sleeve 21, the first engagement assembly 30a and the second engagement assembly 30b can be facilitated, and the overall layout rationality of the power transmission device can be improved.

[0070] In particular implementation, as a preferred implementation form, in the embodiment, the first engagement assembly 30a further comprises a first driving member 32a, which is in transmission connection with the first engagement sleeve 31a to drive the first engagement sleeve 31a to move axially along the input shaft 14. At the same time, as a preferred implementation form, the second engagement assembly 30b further comprises a second driving member 32b, which is in transmission connection with the second engagement sleeve 31b to drive the second engagement sleeve 31b to move axially along the input shaft 14. Here, the movement of the first engagement sleeve 31a driven by the first driving member 32a and the movement of the second engagement sleeve 31b driven by the second driving member 32b can realize the independent control of the two engagement sleeves, and thus improve the control reliability of the two.

[0071] To be specific, in the embodiment, as a preferred implementation form, in combination with Figure 1 , Figure 3 and Figure 4As shown, the first engaging sleeve 31a and the second engaging sleeve 31b are both provided with a magnetic body 311, and the first driving member 32a and the second driving member 32b both include an electromagnetic coil 322 provided on the first housing 20. It can be understood that, by using the structure of the magnetic body 311 and the electromagnetic coil 322, the electromagnetic force can be used to drive the magnetic body 311 to move, so as to precisely control the movement of the first engaging sleeve 31a and the second engaging sleeve 31b.

[0072] At this time, as a preferred embodiment, in the embodiment, along the axial direction of the input shaft 14, each magnetic body 311 is located on the side of the corresponding electromagnetic coil 322, thereby not only facilitating the arrangement and installation of the magnetic body 311 and the corresponding electromagnetic coil 322, improving the maintenance convenience, but also facilitating the heat dissipation of the electromagnetic coil 322, improving the service life.

[0073] Of course, in addition to arranging each magnetic body 311 on the side of the corresponding electromagnetic coil 322 along the axial direction of the input shaft 14 in the embodiment, each magnetic body 311 can also be arranged between the corresponding electromagnetic coil 322 and the input shaft 14 along the radial direction of the input shaft 14, as shown in Figure 1 and Figure 3 The benefits of such an arrangement mainly lie in that it can facilitate the improvement of the magnetic driving force acting on the magnetic body 311 and the stability of the magnetic driving force, and achieve high-precision control.

[0074] Among them, as a preferred arrangement form, each electromagnetic coil 322 and each magnetic body 311 in the embodiment are arranged in a circle around the input shaft 14, so as to ensure that each electromagnetic coil 322 and the corresponding magnetic body 311 generate sufficient attractive force, so that each electromagnetic coil 322 can attract the corresponding magnetic body 311 to move along the axial direction of the input shaft 14 when energized, thereby driving the engaging sleeve corresponding to each magnetic body 311 to move.

[0075] At the same time, as a preferred embodiment in the embodiment, still referring to Figure 4 As shown, the input shaft 14 is slidably provided with a magnetic shield 312 corresponding to each magnetic body 311, and each magnetic body 311 is arranged on the corresponding magnetic shield 312. Such an arrangement can block the interference of external stray magnetic field on the driving of the magnetic body 311, improve the driving effect, and reduce eddy current loss and hysteresis loss.

[0076] In this embodiment, as a preferred implementation, each electromagnetic coil 322 is disposed within the first housing 20 via a second housing 321, and each second housing 321 is provided with an abutment portion 3211. Each abutment portion 3211 is used to attract and adhere to the corresponding magnetic body 311, and to limit the travel distance of the magnetic body 311. It is understood that providing the abutment portion 3211 not only improves the attraction effect on the magnetic body 311, but also limits the travel distance of the magnetic body 311, improving the driving reliability of the magnetic body 311, thereby enhancing the reliability of each coupling sleeve in use.

[0077] It is worth mentioning that, in specific implementation, each magnetic shield 312 and each second housing 321 in this embodiment can preferably be set as a ring around the input shaft 14, so as to better arrange and install the corresponding magnetic body 311 and electromagnetic coil 322.

[0078] Furthermore, in this embodiment, as a preferred implementation, see also [link to previous section]. Figure 1 and Figure 3 As shown, the second housing 321 is provided with locking members 24 on both sides along the axial direction of the input shaft 14, and the second housing 321 is mounted on the first housing 20 through the locking members 24 on both sides, so as to facilitate the convenient assembly and disassembly of the second housing 321, that is, to realize the assembly and disassembly of the electromagnetic coil 322.

[0079] Of course, in addition to being provided on the inner wall of the first housing 20 by means of the two side retaining members 24, the second housing 321 can also be provided in other forms. For example, as a preferred embodiment, in this embodiment, the inner wall of the first housing 20 is provided with a shoulder 23 and a retaining member 24 spaced apart from the shoulder 23. The second housing 321 is provided between the shoulder 23 and the retaining member 24, which can also realize the convenient assembly and disassembly of the second housing 321.

[0080] Furthermore, based on the two configurations of the second housing 321 described above, in this embodiment, the second housing 321 in the first driving member 32a can preferably be configured between the shoulder 23 and the retaining member 24, and the second housing 321 in the second driving member 32b can preferably be configured between the retaining members 24 on both sides.

[0081] In addition, in this embodiment, as a preferred implementation, it is still as follows Figure 4 As shown, the input shaft 14 is provided with a shoulder 141. One end of the first elastic member 33a is connected to the shoulder 141, and the other end of the first elastic member 33a is connected to the first coupling sleeve 31a. This facilitates the installation and arrangement of the first elastic member 33a.

[0082] Meanwhile, in this embodiment, as a preferred implementation, see [reference needed]. Figure 5As shown, the input shaft 14 is provided with a detachable stop piece 142, one end of the second elastic member 33b is connected with the stop piece 142, and the other end of the second elastic member 33b is connected with the second engaging sleeve 31b. By arranging the detachable stop piece 142, the installation and arrangement of the second elastic member 33b can be facilitated.

[0083] In the embodiment, the clamping piece 24 and the stop piece 142 can preferably adopt a clamping ring known by those skilled in the art, so as to have better disassembly convenience. The first elastic member 33a and the second elastic member 33b can preferably adopt a spring, so as to achieve the purpose of cost reduction.

[0084] In addition, in the embodiment, as a preferred implementation form, referring to Figures 1 to 3 As shown, the side of the device housing 10 facing the output shaft sleeve 21 is provided with a connecting shaft 15, the input shaft 14 passes through the shaft hole of the connecting shaft 15 and is in driving connection with the output shaft sleeve 21, and the second engaging sleeve 31b is in driving connection with the device housing 10 through the connecting shaft 15. In this way, the arrangement of the device housing 10, the input shaft 14, the second engaging assembly 30b and other related components can be more reasonable, and the driving connection between the second engaging sleeve 31b and the device housing 10 can be facilitated.

[0085] It is still worth mentioning that the first engaging sleeve 31a and the second engaging sleeve 31b can adopt dog-type engaging sleeves, and the end surface of the output shaft sleeve 21 facing the first engaging sleeve 31a is provided with an end surface tooth structure meshing with the first engaging sleeve 31a. Similarly, the end surface of the connecting shaft 15 facing the second engaging sleeve 31b is provided with an end surface tooth structure meshing with the second engaging sleeve 31b, so as to facilitate the connection or disconnection between the first engaging sleeve 31a and the output shaft sleeve 21, and the connection or disconnection between the second engaging sleeve 31b and the connecting shaft 15. In the overall structural layout of the power transmission device, the second engaging assembly 30b and the first engaging assembly 30a are preferably arranged on the left and right sides of the shaft shoulder 141, and the stop piece 142 is preferably arranged in the gap between the right end of the connecting shaft 15 and the input shaft 14, so as to improve the structural compactness.

[0086] Moreover, in the embodiment, in specific implementation, the first engaging sleeve 31a can be keyed connected with the input shaft 14 through the first spline 143 and axially move along the input shaft 14. Similarly, the second engaging sleeve 31b can be keyed connected with the input shaft 14 through the second spline 144 and axially move along the input shaft 14. Based on the arrangement of the first spline 143 and the second spline 144, the moving stability of the first engaging sleeve 31a and the second engaging sleeve 31b can be improved, as well as the reliability of the driving connection between the first engaging sleeve 31a and the output shaft sleeve 21, and the reliability of the driving connection between the second engaging sleeve 31b and the connecting shaft 15.

[0087] Further, the output shaft sleeve 21 is rotatably arranged in the first housing 20 through the first bearing 211, and in the state shown, the left end of the input shaft 14 is in driving connection with the half shaft gear 11, and the right end of the input shaft 14 is rotatably arranged in the output shaft sleeve 21 through the second bearing 22, so that the output shaft sleeve 21 is supported through the first bearing 211, and the right end of the input shaft 14 is supported through the second bearing 22. Meanwhile, in order to ensure the stability of the connecting shaft 15, the connecting shaft 15 is also rotatably arranged in the first housing 20 through the third bearing 16. Figure 1 In the state shown, the left end of the input shaft 14 is in driving connection with the half shaft gear 11, and the right end of the input shaft 14 is rotatably arranged in the output shaft sleeve 21 through the second bearing 22, so that the output shaft sleeve 21 is supported through the first bearing 211, and the right end of the input shaft 14 is supported through the second bearing 22. Meanwhile, in order to ensure the stability of the connecting shaft 15, the connecting shaft 15 is also rotatably arranged in the first housing 20 through the third bearing 16.

[0088] Secondly, the power transmission device in the actual use process can realize optional setting based on the detachable arrangement of the second housing 321 and the key connection form of the first engaging sleeve 31a, the second engaging sleeve 31b and the input shaft 14, for example, when only the disconnection function is needed, the second housing 321 (i.e. the second driving member 32b) and the second engaging sleeve 31b and other parts related to the differential lock (locking) function are removed.

[0089] In the embodiment, the force transmission schematic diagrams of the power transmission device in the disconnection mode, the differential mode and the locking mode are shown in FIGS. 1-3, respectively. Figures 6 to 8 In the disconnection mode, the first driving member 32a drives the first engaging sleeve 31a to compress the first elastic member 33a to move left and away from the output shaft sleeve 21, and the driving force transmitted to the input shaft 14 from the half shaft gear 11 cannot be transmitted to the output shaft sleeve 21 because the first engaging sleeve 31a and the output shaft sleeve 21 are not in driving connection, so as to realize the disconnection function and further realize energy saving.

[0090] In the differential mode, the first driving member 32a does not drive the first engaging sleeve 31a to move, and the first engaging sleeve 31a is in driving connection with the output shaft sleeve 21 under the elastic pushing of the first elastic member 33a, the driving force transmitted to the input shaft 14 from the half shaft gear 11 is transmitted to the output shaft sleeve 21 through the first engaging sleeve 31a, and then transmitted to the wheels through the half shaft, so as to realize torque transmission. In the locking mode, on the basis of keeping the first engaging sleeve 31a and the output shaft sleeve 21 in driving connection, the second driving member 32b is started to drive the second engaging sleeve 31b to compress the second elastic member 33b and be in driving connection with the connecting shaft 15, that is, the input shaft 14 and the differential housing are in driving connection, so that the output shaft sleeve 21 and the differential housing rotate synchronously, thereby realizing the locking function (the two half shaft gears 11 correspond to the synchronous rotation of the half shafts, that is, the synchronous rotation of the corresponding wheels), and improving the vehicle escape function.

[0091] The power transmission device of the embodiment can realize differential function by the transmission connection of the first engaging sleeve 31a and the output shaft sleeve 21, and can realize disconnection function by the disconnection of the first engaging sleeve 31a and the output shaft sleeve 21, so as to reduce energy loss, solve the problem that the four-wheel drive vehicle is towed reversely when one drive axle does not work, and improve the off-road escape ability and driving performance of the vehicle, thereby facilitating the improvement of the product quality of the power transmission device. Moreover, the power transmission device has low design cost, high integration, and solves the problems of complex execution mechanism and large space of the conventional disconnection device, and is difficult to implement in the matching process.

[0092] It is worth mentioning that the power transmission device of the embodiment can integrate differential, disconnection and locking functions when used as a differential assembly. However, for some customers who have selection requirements for vehicle power types, it may not be necessary to have differential, disconnection and locking functions at the same time.

[0093] Therefore, in order to realize the selection setting of the power transmission device of the embodiment, in some exemplary other implementation forms, as shown in Figure 9 For example, the power transmission device of the embodiment can also include a device housing 10, a half shaft gear 11 arranged in the device housing 10, an input shaft 14 connected with the half shaft gear 11, an output shaft sleeve 21 arranged corresponding to the input shaft 14 in the axial direction of the input shaft 14, and a first engaging assembly 30a arranged on the input shaft 14.

[0094] At this time, the first engaging assembly 30a includes a first engaging sleeve 31a slidingly arranged on the input shaft 14, and a first elastic member 33a arranged between the input shaft 14 and the first engaging sleeve 31a. The first engaging sleeve 31a is in transmission connection with the output shaft sleeve 21, and when the first engaging sleeve 31a is driven to move in the axial direction of the input shaft 14, the first elastic member 33a can be compressed and moved away from the output shaft sleeve 21.

[0095] In specific implementation, as a preferred implementation form, in the embodiment, the first engaging assembly 30a further includes a first driving member 32a in transmission connection with the first engaging sleeve 31a, so as to drive the first engaging sleeve 31a to move in the axial direction of the input shaft 14.

[0096] At this time, as described above, the power transmission device of the embodiment can realize differential function by the transmission connection of the first engaging sleeve 31a and the output shaft sleeve 21 when used as a differential assembly, and can realize disconnection function by the disconnection of the first engaging sleeve 31a and the output shaft sleeve 21, so as to reduce energy loss.

[0097] That is, compared with the power transmission device with the disconnect mode, the differential mode and the lock mode described in the above examples, the main difference of the power transmission device of the embodiment is that the second engagement assembly 30b and the parts related to the lock function such as the connecting shaft 15 are removed, and only the disconnect mode and the differential mode can be realized, so as to meet the situation that the customer only selects the power transmission device with the disconnect function and the differential function. Of course, as for the related structures and functions not mentioned in the power transmission device of the embodiment, they can be referred to the detailed contents described above, and will not be described here.

[0098] It should be pointed out that, in addition to the structure shown in Figure 9 , of course, the same is true for the need to realize the selected setting, in some other exemplary embodiments, such as Figure 10 , the power transmission device of the embodiment can also include the device housing 10, the half shaft gear 11 arranged in the device housing 10, the input shaft 14 connected with the half shaft gear 11, the output shaft sleeve 21 arranged corresponding to the input shaft 14 in the axial direction of the input shaft 14, and the second engagement assembly 30b arranged on the input shaft 14.

[0099] At this time, the second engagement assembly 30b includes the second engagement sleeve 31b slidingly arranged on the input shaft 14, and the second elastic member 33b arranged between the input shaft 14 and the second engagement sleeve 31b. When the second engagement sleeve 31b is driven to move axially along the input shaft 14, the second elastic member 33b can be compressed to be close to and drivingly connected with the device housing 10.

[0100] In specific implementation, as a preferred embodiment, the second engagement assembly 30b further includes the second driving member 32b, which is drivingly connected with the second engagement sleeve 31b to drive the second engagement sleeve 31b to move axially along the input shaft 14. At the same time, in order to save cost and improve structural stability, the output shaft sleeve 21 can be preferably fixedly connected with the input shaft 14.

[0101] At this time, as set above, the power transmission device of the embodiment can realize the differential function when the second engagement sleeve 31b is disconnected from the driving connection with the device housing 10, and can realize the lock function through the driving connection of the second engagement sleeve 31b with the device housing 10 when it is used as a differential assembly, so as to improve the off-road escape ability of the vehicle and improve the driving performance of the whole vehicle.

[0102] That is, compared with the power transmission device with the disconnect mode, the differential mode and the lock mode described in the above examples, the main difference of the power transmission device of the embodiment is that the parts related to the disconnect function such as the first engagement assembly 30a are removed, and the output shaft sleeve 21 is fixedly connected with the input shaft 14, only the differential mode and the lock mode can be realized, thereby meeting the case that the customer only selects the differential and lock function of the power transmission device. Of course, as for the related structure and function not mentioned in the power transmission device of the embodiment, the detailed content described above can be referred to, and will not be described here.

[0103] Embodiment two

[0104] The embodiment relates to a vehicle, and the vehicle is provided with the power transmission device in the embodiment one.

[0105] The vehicle of the embodiment can realize the differential, disconnect and lock functions when the power transmission device is used as a differential assembly, has good use reliability, and makes the whole vehicle have better power transmission performance, thereby facilitating the improvement of the whole vehicle quality.

[0106] The above is only a preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement, improvement and the like made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A power transmission device, characterized in that: comprising a device housing (10), a half shaft gear (11) arranged in the device housing (10), an input shaft (14) connected with the half shaft gear (11), an output shaft sleeve (21) arranged in the input shaft (14) in the axial direction of the input shaft (14), and a first engagement assembly (30a) and / or a second engagement assembly (30b) arranged on the input shaft (14); the first engagement assembly (30a) comprises a first engagement sleeve (31a) slidingly arranged on the input shaft (14), the first engagement sleeve (31a) is driven to move in the axial direction of the input shaft (14), and can be in driving connection with the output shaft sleeve (21) or disconnected from the driving connection with the output shaft sleeve (21); the second engagement assembly (30b) comprises a second engagement sleeve (31b) slidingly arranged on the input shaft (14), the second engagement sleeve (31b) is driven to move in the axial direction of the input shaft (14), and can be in driving connection with the device housing (10) or disconnected from the driving connection with the device housing (10).

2. The power transmission device according to claim 1, characterized in that: further comprising a first housing (20) arranged at a distance from the device housing (10), and the input shaft (14) is provided with both the first engagement assembly (30a) and the second engagement assembly (30b); the output shaft sleeve (21) is rotatably arranged in the first housing (20), the first engagement assembly (30a) and the second engagement assembly (30b) are both located in the first housing (20), and the second engagement assembly (30b) is located between the first engagement assembly (30a) and the device housing (10).

3. The power transmission device according to claim 1, characterized in that: further comprising a first housing (20) arranged at a distance from the device housing (10), and the output shaft sleeve (21) is rotatably arranged in the first housing (20); the input shaft (14) is provided with the first engagement assembly (30a), and the first engagement assembly (30a) is located in the first housing (20), or the input shaft (14) is provided with the second engagement assembly (30b), and the second engagement assembly (30b) is located in the first housing (20).

4. The power transmission device according to claim 2 or 3, characterized in that: the first engagement assembly (30a) further comprises a first driving member (32a) in driving connection with the first engagement sleeve (31a) to drive the first engagement sleeve (31a) to move in the axial direction of the input shaft (14); the second engagement assembly (30b) further comprises a second driving member (32b) in driving connection with the second engagement sleeve (31b) to drive the second engagement sleeve (31b) to move in the axial direction of the input shaft (14).

5. The power transmission device according to claim 4, characterized in that: ​ ​ ​ ​ ​ ​ ​ ​ ​ The first engaging sleeve (31a) and the second engaging sleeve (31b) are provided with a magnetic body (311), and the first driving member (32a) and the second driving member (32b) each comprise an electromagnetic coil (322) provided on the first housing (20).

6. The power transmission device according to claim 5, characterized in that: Along the input shaft (14) in the axial direction, the magnetic body (311) is located on one side of the electromagnetic coil (322); or, Along the input shaft (14) in the radial direction, the magnetic body (311) is located between the electromagnetic coil (322) and the input shaft (14).

7. The power transmission device according to claim 5, characterized in that: The input shaft (14) is slidably provided with a magnetic shielding cover (312) corresponding to each magnetic body (311), and the magnetic body (311) is provided on the magnetic shielding cover (312); and / or, The electromagnetic coil (322) is provided in the first housing (20) through a second housing (321), and an abutting portion (3211) is provided on the second housing (321), and the abutting portion (3211) is used to be adsorbed together with the magnetic body (311) and limit the movement stroke of the magnetic body (311).

8. The power transmission device according to claim 7, characterized in that: Both sides of the second housing (321) in the axial direction of the input shaft (14) are respectively provided with a clamping member (24), and the second housing (321) is provided on the first housing (20) through the clamping members (24) on both sides; or, An inner wall of the first housing (20) is provided with a shoulder (23) and a clamping member (24) spaced apart from the shoulder (23), and the second housing (321) is provided between the shoulder (23) and the clamping member (24).

9. The power transmission device according to any one of claims 1 to 3, characterized in that: The first engaging assembly (30a) further comprises a first elastic member (33a) provided between the input shaft (14) and the first engaging sleeve (31a), the first engaging sleeve (31a) is in transmission connection with the output shaft sleeve (21), and when the first engaging sleeve (31a) is driven to move in the axial direction of the input shaft (14), the first elastic member (33a) can be compressed and moved away from the output shaft sleeve (21).

10. The power transmission device according to claim 9, characterized in that: The input shaft (14) is provided with a shaft shoulder (141), one end of the first elastic member (33a) is connected with the shaft shoulder (141), and the other end of the first elastic member (33a) is connected with the first engaging sleeve (31a).

11. The power transmission device according to any one of claims 1 to 3, characterized in that: The second engagement assembly (30b) further comprises a second elastic member (33b) arranged between the input shaft (14) and the second engagement sleeve (31b), and the second elastic member (33b) is compressed when the second engagement sleeve (31b) is driven to move axially along the input shaft (14), so as to be close to and in driving connection with the device housing (10).

12. The power transmission device according to claim 11, characterized in that: The input shaft (14) is provided with a detachable stopper (142), one end of the second elastic member (33b) is connected with the stopper (142), and the other end of the second elastic member (33b) is connected with the second engagement sleeve (31b).

13. The power transmission device according to any one of claims 1 to 3, characterized in that: The input shaft (14) is provided with the second engagement assembly (30b); The side of the device housing (10) facing the output shaft sleeve (21) is provided with a connecting shaft (15), the input shaft (14) passes through the shaft hole of the connecting shaft (15) and is in driving connection with the output shaft sleeve (21), and the second engagement sleeve (31b) is in driving connection with the device housing (10) through the connecting shaft (15).

14. A vehicle, characterized in that: The vehicle is provided with the power transmission device according to any one of claims 1 to 13.

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