Electromagnetic differential lock device, transmission system and vehicle

Abstract

The application provides an electromagnetic differential lock device, a transmission system and a vehicle. The electromagnetic differential lock device comprises: a joint gear sleeve, which is sleeved on a first output shaft assembly and a second output shaft assembly of the transmission system; an electromagnetic driving assembly, which is connected with the joint gear sleeve; and a return elastic member, which is sleeved on the second output shaft assembly and connected with the joint gear sleeve. The joint gear sleeve is provided with internal splines which are matched with external splines on the first output shaft assembly and the second output shaft assembly. The internal splines and the external splines are arranged in sections. The electromagnetic driving assembly is used to drive the joint gear sleeve to move towards the second output shaft assembly when powered on. The internal splines of the joint gear sleeve are engaged with the external splines of the first output shaft assembly and the second output shaft assembly to realize differential locking. In the above manner, differential locking is realized. The overall structure is simple, the operation is simple and convenient, the performance of the vehicle is stable, and the reliability is high.

Description

Technical Field

[0001] This application relates to the field of new energy vehicle technology, and in particular to an electromagnetic differential lock device, transmission system and vehicle. Background Technology

[0002] Existing mechanical differential locks forcibly lock the differential through physical structure, eliminating speed differences between wheels and achieving 100% torque transmission. They are currently the most reliable type of differential lock and are widely used in hardcore off-road vehicles and extreme off-road scenarios. The mainstream mechanical differential locks include Eaton automatic locking differential locks, ARB pneumatic locking differential locks, and manual mechanical locking differential locks. However, the overall structure of mainstream mechanical differential locks is complex and cumbersome to operate, resulting in lower vehicle performance and reliability. Utility Model Content

[0003] This application mainly provides an electromagnetic differential lock device, transmission system, and vehicle to solve the problem of low vehicle performance and reliability due to complex structure and cumbersome operation.

[0004] This application provides an electromagnetic differential lock device for use in a transmission system, the electromagnetic differential lock device comprising: The gear sleeve is fitted onto the first output shaft assembly and the second output shaft assembly of the transmission system. The electromagnetic drive assembly is connected to the connecting toothed sleeve; A return elastic element is sleeved on the second output shaft assembly and connected to the engaging toothed sleeve; The coupling sleeve is provided with an internal spline that is adapted to the external splines on the first output shaft assembly and the second output shaft assembly. The internal spline and the external spline are segmented. The electromagnetic drive assembly is used to drive the coupling sleeve to move closer to the second output shaft assembly when energized. The internal spline of the coupling sleeve engages with the external splines of the first output shaft assembly and the second output shaft assembly to achieve differential locking.

[0005] In some embodiments, when the electromagnetic drive assembly is de-energized, the return elastic member pushes the engagement sleeve to move away from the second output shaft assembly, the internal spline of the engagement sleeve disengages from the external splines of the first and second output shaft assemblies, and the first and second output shaft assemblies are disconnected.

[0006] In some embodiments, the differential lock device further includes a connector that is connected to the electromagnetic drive assembly and the engagement gear sleeve, respectively.

[0007] In some embodiments, the return elastic element includes a spring connected to the engagement toothed sleeve and sleeved on the second output shaft assembly.

[0008] This application also provides a transmission system, including a motor shaft assembly, a first input shaft assembly, a first intermediate shaft assembly, a first output shaft assembly, a second input shaft assembly, a second intermediate shaft assembly, a second output shaft assembly, and a differential lock device as described above; The motor shaft assembly is connected to the first input shaft assembly and the second input shaft assembly respectively. The first intermediate shaft assembly is connected to the first input shaft assembly and the first output shaft assembly respectively. The second intermediate shaft assembly is connected to the second input shaft assembly and the second output shaft assembly respectively. The engagement sleeve of the differential lock device is fitted onto the first output shaft assembly and the second output shaft assembly.

[0009] In some embodiments, the first output shaft assembly includes a first output shaft, the second output shaft assembly includes a second output shaft, the coupling sleeve is sleeved on the first output shaft and the second output shaft, and the return elastic element of the differential lock device is sleeved on the second output shaft.

[0010] In some embodiments, the first output shaft assembly further includes a first limiting member disposed on the first output shaft, the second output shaft assembly further includes a second limiting member disposed on the second output shaft, the connecting sleeve is sleeved on the first output shaft and the second output shaft and disposed close to the first limiting member, and the return elastic member is sleeved on the second output shaft and disposed close to the second limiting member.

[0011] In some embodiments, the electromagnetic drive component of the differential lock device is energized, driving the engagement tooth sleeve to move closer to the second limiting member, the return elastic member abuts against the second limiting member, the internal spline of the engagement tooth sleeve meshes with the external splines of the first output shaft and the second output shaft, and the first output shaft and the second output shaft are connected.

[0012] In some embodiments, the motor shaft assembly includes a differential, a motor shaft, and a differential housing. One end of the motor shaft is connected to the second input shaft assembly, and the other end of the motor shaft is connected to the first input shaft assembly via the differential. The differential is disposed within the differential housing.

[0013] This application also provides a vehicle including the differential lock device as described above, or the transmission system as described above.

[0014] The beneficial effects of this application are: this application drives the engagement gear sleeve to move on the first output shaft assembly and the second output shaft assembly through the electromagnetic drive component, so that the internal spline of the engagement gear sleeve meshes with the external spline of the first output shaft assembly and the second output shaft assembly, thereby realizing differential locking. The overall structure is simple, the operation is simple and convenient, and the vehicle has stable performance and high reliability. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a schematic diagram of an embodiment of the electromagnetic differential lock device provided in this application; Figure 2 yes Figure 1 A partial cross-sectional schematic diagram of the electromagnetic differential lock device; Figure 3 This is a cross-sectional schematic diagram of an embodiment of the first output shaft assembly, the second output shaft assembly, and the electromagnetic differential lock device provided in this application; Figure 4 This is a schematic diagram of the structure of an embodiment of the transmission system provided in this application; Figure 5 yes Figure 4 A cross-sectional schematic diagram of an embodiment of the motor shaft assembly.

[0016] Reference numerals: 100, Transmission system; 10, Differential lock device; 20, Motor shaft assembly; 30, First input shaft assembly; 40, First intermediate shaft assembly; 50, First output shaft assembly; 60, Second input shaft assembly; 70, Second intermediate shaft assembly; 80, Second output shaft assembly; 11, Engaging gear sleeve; 12, Electromagnetic drive assembly; 13, Return elastic element; 14, Connecting element; 51, First output shaft; 52, First limiting element; 81, Second output shaft; 82, Second limiting element; 21, Differential; 22, Motor shaft; 23, Differential housing. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0019] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0020] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0021] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0022] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0023] Existing mechanical differential locks forcibly lock the differential through physical structure, eliminating speed differences between wheels and achieving 100% torque transmission. They are currently the most reliable type of differential lock and are widely used in hardcore off-road vehicles and extreme off-road scenarios. The mainstream mechanical differential locks currently include Eaton automatic locking differential locks, ARB pneumatic locking differential locks, and manual mechanical locking differential locks.

[0024] Eaton's automatic locking differential lock is based on a "speed difference sensing + mechanical locking" mechanism, integrating a planetary gear set, spring pressure plate, and locking pin within the differential. During normal vehicle operation, the planetary gears allow for a speed difference between the two wheels. When one wheel slips (the speed difference exceeds a threshold), the higher-speed wheel drives a slider via the planetary gears to compress the spring, ultimately engaging the slider with the half-shaft gear ring to achieve 100% locking. However, Eaton's automatic locking differential lock is only passively triggered, cannot predict scenarios, and has a high locking threshold (slight slippage may not activate it). Its planetary gear structure is complex and costly.

[0025] The ARB pneumatic locking differential lock uses compressed air to achieve active locking. Internally, it integrates a pneumatic piston, locking teeth, and a sealing chamber. To lock, the operator injects compressed air into the locking mechanism via an in-vehicle pneumatic switch, pushing the piston to press against the locking teeth, rigidly connecting the left and right half-shafts. The ARB pneumatic locking differential lock relies on a compressed air system, requiring an additional air pump or air tank. The pneumatic lines are susceptible to damage (rock scraping during off-road driving can cause air leakage and failure), necessitating regular maintenance of the air system.

[0026] Manually operated mechanical differential locks use bolts, pins, or cranks to manually operate the locking mechanism, physically connecting the two half-shafts of the differential to achieve locking. For bolt-locked locks, the differential housing has pre-drilled threaded holes; a threaded locking bolt is inserted, and tightening it compresses the half-shaft gears to secure it. For pin-locked locks, the differential has an integrated pin slot; an external crank drives the pin into the locking slot to achieve locking. Manually operated mechanical differential locks are cumbersome, requiring manual intervention while the vehicle is stopped. Since unlocking is necessary for highway driving, frequent operation can easily lead to bolt wear.

[0027] This application provides an electromagnetic differential lock device for use in a transmission system. Please refer to [link / reference]. Figures 1-5 As shown, Figure 1 This is a schematic diagram of an embodiment of the electromagnetic differential lock device provided in this application; Figure 2 yes Figure 1 A partial cross-sectional schematic diagram of the electromagnetic differential lock device; Figure 3 This is a cross-sectional schematic diagram of an embodiment of the first output shaft assembly, the second output shaft assembly, and the electromagnetic differential lock device provided in this application; Figure 4 This is a schematic diagram of the structure of an embodiment of the transmission system provided in this application; Figure 5 yes Figure 4 A cross-sectional schematic diagram of an embodiment of the motor shaft assembly. The electromagnetic differential lock device 10 of this embodiment includes a coupling gear sleeve 11, an electromagnetic drive assembly 12, and a return elastic element 13.

[0028] A gear sleeve 11 is fitted onto the first output shaft assembly 50 and the second output shaft assembly 80 of the transmission system 100; an electromagnetic drive assembly 12 is connected to the gear sleeve 11; and a return elastic element 13 is fitted onto the second output shaft assembly 80 and connected to the gear sleeve 11. The electromagnetic drive assembly 12 includes, but is not limited to, an electromagnetic coil; and the return elastic element 13 includes, but is not limited to, a spring or an elastic rubber body.

[0029] In some embodiments, the first output shaft assembly 50 and the second output shaft assembly 80 of the transmission system 100 are disposed opposite to each other. The coupling sleeve 11 is sleeved on the end of the first output shaft assembly 50 near the second output shaft assembly 80, and part of the coupling sleeve 11 is sleeved on the end of the second output shaft assembly 80 near the first output shaft assembly 50. The return elastic member 13 is sleeved on the second output shaft assembly 80 and connected to the coupling sleeve 11. The coupling sleeve 11 is also connected to the electromagnetic drive assembly 12.

[0030] For example Figure 1 As shown, the combined tooth sleeve 11 is shaped like a sleeve, the electromagnetic drive assembly 12 is connected to the outer wall of the combined tooth sleeve 11, and the return elastic member 13 is connected to one end of the combined tooth sleeve 11.

[0031] The gear sleeve 11 is provided with an internal spline (not shown in the figure) that is adapted to the external spline (not shown in the figure) on the first output shaft assembly 50 and the second output shaft assembly 80. The internal spline and the external spline are segmented. The electromagnetic drive assembly 12 is used to drive the gear sleeve 11 to move closer to the second output shaft assembly 80 when energized. The internal spline of the gear sleeve 11 meshes with the external spline of the first output shaft assembly 50 and the second output shaft assembly 80 to achieve differential locking.

[0032] In some embodiments, when the vehicle is in a bad road condition and one wheel slips, the differential lock function is activated. The electromagnetic drive assembly 12 operates with current, and the electromagnetic force drives the coupling sleeve 11 to move towards the second output shaft assembly 80. The return elastic element 13 is compressed, and the internal spline on the coupling sleeve 11 meshes with the external spline on the first output shaft assembly 50 and the second output shaft assembly 80. The first output shaft assembly 50 and the second output shaft assembly 80 become rigidly connected, thereby stopping the slipping tire and transferring all torque to the wheel with traction, thus achieving differential lock.

[0033] Compared with mainstream mechanical differential locks, this embodiment uses an electromagnetic drive assembly 12 to drive the engagement sleeve 11 to move on the first output shaft assembly 50 and the second output shaft assembly 80, so that the internal spline of the engagement sleeve 11 meshes with the external spline of the first output shaft assembly 50 and the second output shaft assembly 80, thereby achieving differential locking. The overall structure is simple, the operation is simple and convenient, and the vehicle performance is stable and highly reliable.

[0034] According to some embodiments of this application, when the electromagnetic drive assembly 12 is de-energized, the return elastic member 13 pushes the engagement sleeve 11 to move away from the second output shaft assembly 80, and the internal spline of the engagement sleeve 11 disengages from the external spline of the first output shaft assembly 50 and the second output shaft assembly 80, thus disconnecting the first output shaft assembly 50 and the second output shaft assembly 80.

[0035] In some embodiments, when the differential lock function is turned off, no current flows through the electromagnetic drive assembly 12, and the return elastic member 13 pushes the engagement sleeve 11 back to the direction of the first output shaft assembly 50. The internal spline of the engagement sleeve 11 disengages from the external spline of the first output shaft assembly 50 and the second output shaft assembly 80, and the first output shaft assembly 50 and the second output shaft assembly 80 are disconnected, thus disengaging the differential lock.

[0036] Compared with mainstream mechanical differential locks, the differential lock device 10 in this embodiment is not associated with the vehicle system and does not provide an additional power source. It is maintenance-free and can be locked and unlocked simply by operating the lock switch, making it simple and convenient to operate.

[0037] According to some embodiments of this application, please refer to Figure 2 and Figure 3 As shown, the differential lock device 10 in this embodiment also includes a connector 14, which is connected to the electromagnetic drive assembly 12 and the gear sleeve 11 respectively.

[0038] The connector 14 includes, but is not limited to, a connecting arm or a lever.

[0039] In some embodiments, when the electromagnetic drive assembly 12 is powered on, it pushes the connector 14 through electromagnetic force, and the connector 14 drives the engagement sleeve 11 to move toward the second output shaft assembly 80; when the electromagnetic drive assembly 12 is de-powered, there is no longer electromagnetic force pushing the connector 14, and the return elastic member 13 pushes the engagement sleeve 11 back toward the first output shaft assembly 50.

[0040] In this embodiment, the connector 14 serves as a dedicated force transmission intermediary between the electromagnetic drive assembly 12 and the engagement gear sleeve 11, converting the electromagnetic thrust / pull force into a more direct and stable axial drive for the engagement gear sleeve 11. This isolates the electromagnetic drive assembly 12 from the complex mechanical loads (such as spline meshing impact and drive shaft vibration), allowing the electromagnetic drive assembly 12 to primarily perform pure electromagnetic drive functions. This effectively protects the precision electromagnetic drive assembly 12 and significantly improves its operational reliability and service life.

[0041] According to some embodiments of this application, please refer to Figures 1-3As shown, the return elastic element 13 in this embodiment includes a spring (not shown in the figure), which is connected to the engagement tooth sleeve 11 and is sleeved on the second output shaft assembly 80.

[0042] For example Figure 1 As shown, the spring is in the form of a helical spring, which is convenient to be fitted onto the second output shaft assembly 80.

[0043] In this embodiment, a spring is used as a return element. The elastic potential energy stored in the spring after it is compressed or stretched provides a constant and passive return driving force for the engagement gear sleeve 11. When the electromagnetic drive component 12 is de-energized, the elastic force of the spring can instantly, automatically and forcibly push or pull the engagement gear sleeve 11 back to the unlocked position, ensuring the rapid and reliable recovery of the differential function.

[0044] Another embodiment of this application provides a transmission system 100 applied to a vehicle. See also... Figures 3-5 As shown, the transmission system 100 of this embodiment includes a motor shaft assembly 20, a first input shaft assembly 30, a first intermediate shaft assembly 40, a first output shaft assembly 50, a second input shaft assembly 60, a second intermediate shaft assembly 70, a second output shaft assembly 80, and a differential lock device 10 as described in the above embodiment.

[0045] The motor shaft assembly 20 is connected to the first input shaft assembly 30 and the second input shaft assembly 60 respectively; the first intermediate shaft assembly 40 is connected to the first input shaft assembly 30 and the first output shaft assembly 50 respectively; the second intermediate shaft assembly 70 is connected to the second input shaft assembly 60 and the second output shaft assembly 80 respectively; and the engagement sleeve 11 of the differential lock device 10 is fitted onto the first output shaft assembly 50 and the second output shaft assembly 80.

[0046] For example Figure 4 As shown, the first intermediate shaft assembly 40 is connected to the first input shaft assembly 30 and the first output shaft assembly 50 via meshing gears, and the second intermediate shaft assembly 70 is connected to the second input shaft assembly 60 and the second output shaft assembly 80 via meshing gears.

[0047] In this embodiment, the engagement sleeve 11 of the differential lock device 10 is fitted onto the first output shaft assembly 50 and the second output shaft assembly 80, so that the differential lock acts on the downstream of the transmission system 100, that is, the final output end. The downstream of the transmission system 100 is the most direct and effective position for locking the differential, which can ensure that the first output shaft assembly 50 and the second output shaft assembly 80 are completely rigidly connected when locked, achieving a 100% locking effect.

[0048] According to some embodiments of this application, please refer to Figure 3As shown, the first output shaft assembly 50 of this embodiment includes a first output shaft 51, the second output shaft assembly 80 includes a second output shaft 81, the gear sleeve 11 is sleeved on the first output shaft 51 and the second output shaft 81, and the return elastic element 13 of the differential lock device 10 is sleeved on the second output shaft 81.

[0049] In some embodiments, the connecting sleeve 11 is coaxially arranged with the first output shaft 51 and the second output shaft 81. The connecting sleeve 11 is sleeved on the end of the first output shaft 51 near the second output shaft 81, and a portion of the connecting sleeve 11 is sleeved on the end of the second output shaft 81 near the first output shaft 51. The return elastic member 13 is sleeved on the second output shaft 81 and connected to the connecting sleeve 11.

[0050] In this embodiment, the toothed sleeve 11 and the return elastic element 13 (spring) are sleeved on the first output shaft 51 and the second output shaft 81, so that the first output shaft 51 and the second output shaft 81 act as precise guide shafts for the sliding engagement of the toothed sleeve 11 and the action of the return elastic element 13 (spring). This ensures that the internal spline of the toothed sleeve 11 maintains a very high coaxiality with the external splines of the first output shaft 51 and the second output shaft 81 when the axial movement is axial. This significantly reduces the risk of engagement jamming, impact wear or incomplete locking caused by alignment deviation, making the locking / unlocking action precise, smooth and reliable.

[0051] According to some embodiments of this application, please refer to Figure 3 As shown, the first output shaft assembly 50 of this embodiment further includes a first limiting member 52 disposed on the first output shaft 51, and the second output shaft assembly 80 further includes a second limiting member 82 disposed on the second output shaft 81.

[0052] The first limiting member 52 and the second limiting member 82 include, but are not limited to, limiting retaining rings.

[0053] The toothed sleeve 11 is fitted onto the first output shaft 51 and the second output shaft 81 and is positioned close to the first limiting member 52. The return elastic member 13 is fitted onto the second output shaft 81 and is positioned close to the second limiting member 82.

[0054] For example Figure 3 As shown, when the locking function is not activated, the electromagnetic drive assembly 12 of the differential lock device 10 is not powered on. The engaging gear sleeve 11 is fitted onto the first output shaft 51 and the second output shaft 81, and one end of the engaging gear sleeve 11 abuts against the first limiting member 52. The return elastic member 13 is fitted onto the second output shaft 81, and one end of the return elastic member 13 abuts against the second limiting member 82. The other end of the return elastic member 13 is connected to the other end of the engaging gear sleeve 11.

[0055] According to some embodiments of this application, when the electromagnetic drive assembly 12 of the differential lock device 10 is energized, it drives the engagement sleeve 11 to move toward the second limiting member 82. The return elastic member 13 abuts against the second limiting member 82. The inner spline of the engagement sleeve 11 meshes with the outer spline of the first output shaft 51 and the second output shaft 81, and the first output shaft 51 and the second output shaft 81 are connected.

[0056] In some embodiments, when the electromagnetic drive assembly 12 of the differential lock device 10 is energized, the electromagnetic force pushes the connector 14 of the differential lock device 10, causing the engagement sleeve 11 to move toward the second limiting member 82. The return elastic member 13 is compressed, and one end of the return elastic member 13 abuts against the second limiting member 82. The inner spline of the engagement sleeve 11 meshes with the outer splines of the first output shaft 51 and the second output shaft 81, and the first output shaft 51 and the second output shaft 81 are rigidly connected to achieve differential locking.

[0057] In this embodiment, the first limiting member 52 and the second limiting member 82 provide two precise mechanical stops for the axial movement of the gear sleeve 11. The electromagnetic force drives the connector 14 to push the gear sleeve 11 to move closer to the second limiting member 82. The return elastic member 13 abuts against the second limiting member 82, ensuring 100% reliability of differential locking and integrity of torque transmission.

[0058] According to some embodiments of this application, please refer to Figure 5 As shown, the motor shaft assembly 20 of this embodiment includes a differential 21, a motor shaft 22 and a differential housing 23. One end of the motor shaft 22 is connected to the second input shaft assembly 60, and the other end of the motor shaft 22 is connected to the first input shaft assembly 30 through the differential 21. The differential 21 is disposed inside the differential housing 23.

[0059] Another embodiment of this application provides a vehicle (not shown) including a differential lock device 10 as described in the above embodiments, or a transmission system 100 as described in the above embodiments.

[0060] In some embodiments, the transmission system 100 in the vehicle includes a differential lock device 10 comprising a motor shaft assembly 20 integrating a differential 21, a first input shaft assembly 30, a second input shaft assembly 60, a first intermediate shaft assembly 40, a second intermediate shaft assembly 70, a first output shaft assembly 50, and a second output shaft assembly 80. The motor shaft assembly 20 is connected to the first input shaft assembly 30 and the second input shaft assembly 60, respectively. The first intermediate shaft assembly 40 is connected to the first input shaft assembly 30 and the first output shaft assembly 50, respectively. The second intermediate shaft assembly 70 is connected to the second input shaft assembly 60 and the second output shaft assembly 80, respectively. The engagement sleeve 11 of the differential lock device 10 is sleeved on the first output shaft 51 and the second output shaft 50 of the first output shaft assembly 50. On the second output shaft 81 of the two output shaft assembly 80, one end of the engaging gear sleeve 11 abuts against the first limiting member 52 of the first output shaft assembly 50. The return elastic member 13 of the differential lock device 10 is sleeved on the second output shaft 81 and connected to the engaging gear sleeve 11. The return elastic member 13 abuts against the second limiting member 82 of the second output shaft assembly 80. The electromagnetic drive assembly 12 of the differential lock device 10 is connected to the engaging gear sleeve 11 through the connector 14. When the electromagnetic drive assembly 12 is energized, the electromagnetic force drives the connector 14 to move the engaging gear sleeve 11 toward the direction closer to the second limiting member 82. The return elastic member 13 is compressed, and the inner spline of the engaging gear sleeve 11 meshes with the outer spline of the first output shaft 51 and the second output shaft 81 to achieve differential locking.

[0061] In summary, this application uses the electromagnetic drive assembly 12 to drive the engagement sleeve 11 to move on the first output shaft assembly 50 and the second output shaft assembly 80, so that the internal spline of the engagement sleeve 11 meshes with the external spline of the first output shaft assembly 50 and the second output shaft assembly 80, thereby achieving differential locking. The overall structure is simple, the operation is simple and convenient, and the vehicle has stable performance and high reliability.

[0062] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. An electromagnetic differential lock device, characterized in that, The electromagnetic differential lock device, applied to a transmission system, includes: The gear sleeve is fitted onto the first output shaft assembly and the second output shaft assembly of the transmission system. The electromagnetic drive assembly is connected to the connecting toothed sleeve; A return elastic element is sleeved on the second output shaft assembly and connected to the engaging toothed sleeve; The coupling sleeve is provided with an internal spline that is adapted to the external splines on the first output shaft assembly and the second output shaft assembly. The internal spline and the external spline are segmented. The electromagnetic drive assembly is used to drive the coupling sleeve to move closer to the second output shaft assembly when energized. The internal spline of the coupling sleeve engages with the external splines of the first output shaft assembly and the second output shaft assembly to achieve differential locking.

2. The differential lock device according to claim 1, characterized in that, When the electromagnetic drive assembly is de-energized, the return elastic element pushes the engagement tooth sleeve to move away from the second output shaft assembly, and the internal spline of the engagement tooth sleeve disengages from the external splines of the first output shaft assembly and the second output shaft assembly, thus disconnecting the first output shaft assembly and the second output shaft assembly.

3. The differential lock device according to claim 1, characterized in that, The differential lock device also includes a connector, which is connected to the electromagnetic drive assembly and the engagement gear sleeve respectively.

4. The differential lock device according to claim 1, characterized in that, The return elastic element includes a spring, which is connected to the engaging toothed sleeve and is sleeved on the second output shaft assembly.

5. A transmission system, characterized in that, It includes a motor shaft assembly, a first input shaft assembly, a first intermediate shaft assembly, a first output shaft assembly, a second input shaft assembly, a second intermediate shaft assembly, a second output shaft assembly, and a differential lock device as described in any one of claims 1-4; The motor shaft assembly is connected to the first input shaft assembly and the second input shaft assembly respectively. The first intermediate shaft assembly is connected to the first input shaft assembly and the first output shaft assembly respectively. The second intermediate shaft assembly is connected to the second input shaft assembly and the second output shaft assembly respectively. The engagement sleeve of the differential lock device is fitted onto the first output shaft assembly and the second output shaft assembly.

6. The transmission system according to claim 5, characterized in that, The first output shaft assembly includes a first output shaft, the second output shaft assembly includes a second output shaft, the coupling sleeve is sleeved on the first output shaft and the second output shaft, and the return elastic element of the differential lock device is sleeved on the second output shaft.

7. The transmission system according to claim 6, characterized in that, The first output shaft assembly further includes a first limiting member disposed on the first output shaft, and the second output shaft assembly further includes a second limiting member disposed on the second output shaft. The connecting tooth sleeve is sleeved on the first output shaft and the second output shaft and is disposed close to the first limiting member. The return elastic member is sleeved on the second output shaft and is disposed close to the second limiting member.

8. The transmission system according to claim 7, characterized in that, When the electromagnetic drive component of the differential lock device is energized, it drives the engagement tooth sleeve to move closer to the second limiting member. The return elastic member abuts against the second limiting member. The internal spline of the engagement tooth sleeve meshes with the external splines of the first output shaft and the second output shaft, and the first output shaft and the second output shaft are connected.

9. The transmission system according to claim 5, characterized in that, The motor shaft assembly includes a differential, a motor shaft, and a differential housing. One end of the motor shaft is connected to the second input shaft assembly, and the other end of the motor shaft is connected to the first input shaft assembly through the differential. The differential is disposed within the differential housing.

10. A vehicle, characterized in that, Includes the differential lock device as described in any one of claims 1-4, or the transmission system as described in any one of claims 5-9.

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