Power on-off device of electric drive system

Abstract

The embodiment of the invention provides a power on-off device of an electric drive system. The power on-off device comprises a first transmission assembly, a second transmission assembly and a switch structure. The switch structure comprises a sliding block arranged on the second transmission assembly and a first sliding block groove formed in the first transmission assembly. The sliding block and the first sliding block groove are correspondingly arranged; wherein the first transmission assembly is connected with the electric driving system, and the second transmission assembly is connected with the transmission shaft; when the sliding block is embedded into the first sliding block groove, the first transmission assembly is connected with the second transmission assembly, and the electric driving system transmits power to the transmission shaft through the power on-off device. And when the sliding block is separated from the first sliding block groove, the first transmission assembly is separated from the second transmission assembly. The device is compact in structure and short in axial distance, mechanical control is adopted, continuous energy input is not needed to maintain the connection state, and energy consumption is reduced.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a power on / off device for an electric drive system. Background Art

[0002] At present, with the rapid popularization of electric vehicles, pure electric drive systems have developed rapidly in technology, especially for high-performance electric vehicles, which mostly use two sets of front and rear electric drive systems to ensure high power and achieve four-wheel drive performance. However, since the current electric drive system mostly uses a direct drive device without disconnection, that is, the wheel and the motor end cannot be decoupled, this leads to the fact that for working conditions with low acceleration requirements and working conditions without four-wheel drive, the front and rear electric drive systems cannot achieve the disconnection between the motor and the wheel end. For the permanent magnet synchronous motor of the auxiliary drive, it is necessary to output a small torque to rotate with it, and consume a certain amount of electric energy. For the asynchronous induction motor, although the motor can be rotated without power, its power density and efficiency are low, and the application scenarios are limited. In addition, the two-wheel drive form is the most commonly used working condition by users, so it brings many adverse effects on power consumption and reliability for front and rear dual-motor electric vehicles without disconnection devices.

[0003] In the related art, the disconnecting devices used in most vehicles have problems such as complex structure, which is extremely disadvantageous to the layout of the whole vehicle, and large power loss. Therefore, a new disconnecting device is urgently needed to solve the above problems. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a power on-off device for an electric drive system, so as to achieve the technical effects of compact structure, easy installation and energy saving.

[0005] The embodiment of the present application provides a power on-off device of an electric drive system, the power on-off device comprising a first transmission assembly, a second transmission assembly and a switch structure; the switch structure comprises a slider arranged in the second transmission assembly and a first slider groove arranged in the first transmission assembly; the slider is arranged corresponding to the first slider groove; wherein,

[0006] The first transmission assembly is connected to the electric drive system, and the second transmission assembly is connected to the transmission shaft;

[0007] When the slider is inserted into the first slider groove, the first transmission assembly is connected to the second transmission assembly, and the electric drive system transmits power to the transmission shaft through the power on-off device;

[0008] When the slider is disengaged from the first slider slot, the first transmission assembly is separated from the second transmission assembly.

[0009] In the above implementation process, the first and second transmission components are connected or disconnected through the switch structure to achieve flexible control of power transmission. On the one hand, the structure of the power on-off device is compact, and there is no need for additional support or fixing, which saves installation space. On the other hand, the device specifically realizes power transmission and disconnection by mechanically embedding and disengaging the slider and the first slider groove. Compared with the traditional electromagnetic control that requires continuous current to maintain the magnetic field and thus maintain the power transmission state, the mechanical control of the device does not require continuous energy input to maintain the connection state. Only when the power transmission state needs to be changed (that is, when the slider is embedded in or out of the slider groove), a certain amount of energy needs to be consumed. Such a design has lower energy consumption.

[0010] Furthermore, the first slider grooves are evenly distributed in rotational symmetry with respect to the center of the first transmission assembly.

[0011] In the above implementation process, the rotationally symmetrical and evenly distributed design enables the first slider groove to evenly distribute the force when receiving the slider, which helps to improve the stability of the transmission process.

[0012] Furthermore, the switch structure further comprises a pulling unit, and the pulling unit is used for pulling the slider to be embedded in or out of the first slider groove.

[0013] In the above implementation process, the introduction of the traction unit realizes the automatic operation of the slider being embedded in or out of the first slider groove.

[0014] Furthermore, the switch structure includes a plurality of switch structures, and the plurality of switch structures are radially spaced apart along the second transmission assembly.

[0015] In the above implementation process, on the one hand, the setting of multiple switch structures means that even if one of the switch structures fails, the other switch structures can still work normally to ensure the continuity of power transmission. This redundant design significantly improves the reliability of the system. On the other hand, the switch structures arranged at intervals along the radial direction help to achieve balanced distribution of power on the transmission shaft. This helps to reduce wear and damage caused by uneven force and extend the service life of the equipment.

[0016] Furthermore, a slider limiting rib is provided in the first slider groove;

[0017] The first slider groove is further provided with a clamping block and a clamping block spring, one end of the clamping block spring is connected to the inner wall of the first slider groove, and the other end of the clamping block spring is connected to the slider through the clamping block.

[0018] In the above implementation process, by setting the limiting rib in the first slider slot, it can be ensured that the slider does not deviate or shake when inserted into the slot. The clamping block spring is connected to the slider through the clamping block, and the slider can be inserted into or out of the first slider slot with the help of the spring.

[0019] Further, the traction unit includes an electromagnetic assembly, a reset block, and a reset block spring, one end of the reset block is elastically connected to the electromagnetic assembly, the other end of the reset block is connected to the first end of the reset block spring, and the second end of the reset block spring is fixed to the reset block limiting portion;

[0020] The reset block is used to pull the slider into or out of the first slider groove.

[0021] In the above implementation process, the electromagnetic assembly is the core of the traction unit, which can accurately control the movement of the reset block, thereby affecting the positional relationship between the slider and the first slider groove.

[0022] Further, the second transmission assembly includes an integrally formed driven structure and a connecting structure, the connecting structure includes a plurality of reset block limiters, a plurality of second slider grooves, and a plurality of slide rails that are sequentially arranged at intervals; the second slider groove is arranged corresponding to the first slider groove; the reset block limiter is provided with a mounting groove for accommodating the electromagnetic assembly, and a slider guide block is provided on a side of the second slider groove away from the driven structure;

[0023] The outer side of the driven structure is provided with a reset block guide rib;

[0024] A first sensor and a second sensor are also provided on the outside of the driven structure, and the first sensor and the second sensor are both arranged in cooperation with the reset block; the data collected by the first sensor is used to determine whether the reset block is connected to the electromagnetic component, and the data collected by the second sensor is used to determine whether the reset block is detached from the electromagnetic component.

[0025] In the above implementation process, the one-piece design of the driven structure and the connecting structure makes the entire transmission assembly more compact and integrated.

[0026] Further, the sliding block includes a first limiting portion and a second limiting portion, and the reset stopper includes a third limiting portion cooperating with the first limiting portion and a fourth limiting portion cooperating with the second limiting portion.

[0027] In the above implementation process, the movement of the slider and the reset block requires the cooperation of the limiting parts.

[0028] Furthermore, the slider is provided with a third slider groove, and the third slider groove is arranged in cooperation with the slider guide block.

[0029] In the above implementation process, the cooperation between the third slider groove and the slider guide block provides precise guidance for the slider, ensuring that the slider moves along a predetermined path during movement, thereby avoiding deviation or shaking.

[0030] Furthermore, the reset stopper is provided with a reset stopper guide groove which is arranged in cooperation with the slide track, and a magnetic pole which is arranged in cooperation with the electromagnetic assembly.

[0031] In the above implementation process, the matching arrangement of the sliding track and the reset block guide groove ensures that the reset block can accurately reach the specified position during the movement. In addition, the magnetic poles arranged on the reset block interact with the electromagnetic assembly to control the running direction of the reset block. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 A schematic diagram of the structure of a power on-off device provided in an embodiment of the present application;

[0034] Figure 2 A schematic diagram of the structure of a second transmission assembly provided in an embodiment of the present application;

[0035] Figure 3 A schematic diagram of the structure of a first transmission assembly provided in an embodiment of the present application;

[0036] Figure 4 A schematic diagram of a power on / off device provided in an embodiment of the present application;

[0037] Figure 5 A schematic diagram of a slider structure provided in an embodiment of the present application;

[0038] Figure 6 A schematic diagram of a reset block structure provided in an embodiment of the present application;

[0039] Figure 7 A schematic diagram of a power on / off device combined with a flow chart provided in an embodiment of the present application;

[0040] Figure 8 A schematic diagram of a disconnection process of a power on-off device provided in an embodiment of the present application.

[0041] Among them, 2, the first transmission component; 3, the electromagnetic component; 4, the slider spring; 5, the slider; 6, the clamping block; 7, the clamping block spring; 8, the reset block; 9, the reset block spring; the sliding track 10; 1-1, the electromagnetic component installation groove; 1-2, the slider guide block; 1-3, the reset block guide rib; 1-4, the reset block limit part; 1-5, the first sensor; 1-6, the second sensor; 1-7, the driven structure; 1-8, the second slider groove; 2-1, the first slider groove; 2-2, the slider limit rib; 5-1, the third slider groove; 5-2, the first limit part; 5-3, the second limit part; 8-1, the reset block guide groove; 8-2, the fourth limit part; 8-3, the third limit part; 8-4, the part on the reset block where the magnetic pole direction is specified. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0043] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0044] At present, the disconnecting devices used in electric drive systems mostly use axial disconnecting mechanisms, which are arranged between the output end of the electric drive system and the input end of the half-shaft. The axial distance is large and the structure is complex, which is extremely unfavorable for the layout of the whole vehicle. Especially for the rear electric drive system with high-performance axial dual motors, the traditional axial disconnecting device cannot meet the layout requirements of the whole vehicle. At present, some radial disconnecting devices are mostly controlled by electromagnets. The electromagnets need to work continuously in the connection or disconnection conditions. The system is complex and will lose a certain amount of electrical energy.

[0045] In view of any of the above problems, the present application provides a power on / off device for an electric drive system, referring to Figure 1-3 The power on-off device includes a first transmission component 2, a second transmission component (such as Figure 2 The switch structure includes a slider 5 provided in the second transmission assembly and a first slider groove 2-1 provided in the first transmission assembly 2; the slider 5 is provided corresponding to the first slider groove 2-1; wherein,

[0046] The first transmission assembly 2 is connected to the electric drive system, and the second transmission assembly is connected to the transmission shaft;

[0047] When the slider 5 is inserted into the first slider groove 2-1, the first transmission assembly 2 is connected to the second transmission assembly, and the electric drive system transmits power to the transmission shaft through the power on-off device;

[0048] When the slider 5 is disengaged from the first slider groove 2 - 1 , the first transmission assembly 2 is separated from the second transmission assembly.

[0049] It should be noted that the first transmission assembly 2 and the second transmission assembly may be Figure 2-3 In addition to the disc shape shown, other geometric shapes may also be used. This embodiment is described by taking the first transmission component 2 and the second transmission component as a disc-shaped driving disk and a driven disk, respectively.

[0050] The slider 5 is a symmetrical structure, having a third slider groove 5-1, and a matching surface (ie, a first limiting portion) 5-2 for matching with the reset stopper 8 and is not affected by magnetic force.

[0051] The first slider groove 2-1 is used to embed the slider 5. The number of the sliders 5 is the same as that of the first slider groove 2-1, and the positions are corresponding. This embodiment does not limit the number, and can be as follows: Figure 1 The six shown may also be one, three, etc. When the slider 5 needs to be embedded in the first slider groove 2-1, the slider 5 may be partially embedded in the first slider groove 2-1, or the slider 5 may be fully embedded in the first slider groove 2-1.

[0052] It is understandable that the electric drive system is the source of the entire power transmission, which uses electrical energy to convert into mechanical energy to provide power for the entire system. This system may include key components such as motors and controllers to control the size and direction of power output.

[0053] The first transmission assembly 2 is directly connected to the electric drive system. Its main function is to transmit the power generated by the electric drive system to the next transmission link, i.e., the second transmission assembly.

[0054] The second transmission assembly receives power from the first transmission assembly 2 and further transmits it to the transmission shaft.

[0055] The drive shaft (also known as the half shaft) is responsible for transmitting power to the components that need to be driven, such as wheels, generators or other mechanical equipment.

[0056] Of course, the positions of the first transmission assembly 2 and the second transmission assembly can be exchanged, for example, the first transmission assembly 2 is placed at the output end and connected to the transmission shaft, and the second transmission assembly is placed at the input end and connected to the electric drive system. In addition, the connection structure of the output and input can also be different, and flanges, splines, flat keys, etc. can be used.

[0057] When the slider 5 on the second transmission assembly is inserted into the first slider groove 2-1 on the first transmission assembly 2, the first transmission assembly 2 is connected to the second transmission assembly. At this time, the power on-off device is in a combined state, and the power output of the electric drive system can be transmitted to the transmission shaft. On the contrary, when the slider 5 on the second transmission assembly is disengaged from the first slider groove 2-1 on the first transmission assembly 2, the first transmission assembly 2 is disconnected from the second transmission assembly. At this time, the power on-off device is in a disconnected state, and the power output of the electric drive system cannot be transmitted to the transmission shaft, and the power on-off device interrupts the transmission of power.

[0058] The first and second transmission components are connected in a nested manner, and the flexible control of power transmission is achieved through the switch structure. The power on-off device has the advantages of compact structure, short axial distance and easy installation.

[0059] In some embodiments, the first slider slots 2 - 1 are evenly distributed in rotational symmetry relative to the center of the first transmission assembly 2 .

[0060] Specifically, the plurality of first slider slots 2 - 1 are rotationally symmetric around a center point of the first transmission component 2 (which may be its geometric center or functional center), and are evenly distributed on the first transmission component 2 at equal angles.

[0061] In some embodiments, the switch structure further includes a traction unit, and the traction unit is used to pull the slider 5 to embed into or disengage from the first slider groove 2-1.

[0062] It should be understood that the traction unit is an important component in the switch structure, and its main function is to drive the slider 5 to move through mechanical force or some power source. Specifically, the traction unit can generate sufficient traction force to enable the slider 5 to overcome any factors that hinder its movement (such as spring tension, friction, gravity, etc.), so as to accurately embed or disengage from the first slider groove 2-1.

[0063] Specifically, the switch structure refers to a device that affects the connection state between the first transmission assembly 2 and the second transmission assembly. The switch structure may specifically include: Figure 1 The electromagnetic assembly 3, the slider spring 4, the slider 5, the clamping block 6, the clamping block spring 7, the reset block 8, the reset block spring 9, and the slide rail 10 are shown. Optionally, the slider spring 4 is a flat tension spring; the clamping block 6 is a flat block of metal and is not affected by magnetic force; the clamping block spring 7 is a flat tension spring; and the reset block spring 9 is a flat tension spring.

[0064] The power on-off device has a two-layer structure of a first transmission component 2 (i.e., an active disk) and a second transmission component (i.e., a driven disk). The active disk is provided with a clamping block 6, a slider groove and other related structures, and the driven disk is provided with a slider 5, an electromagnetic component 3, a reset block 8 and other related structures. The combining and disconnecting functions of the device are realized through the relative structural movement relationship between the electromagnetic force and the slider 5 and the reset block 8.

[0065] In some embodiments, the switch structure includes a plurality of switch structures, and the plurality of switch structures are radially spaced apart along the second transmission assembly.

[0066] It should be understood that radial spacing arrangement refers to arranging multiple switch structures in an equidistant or unequally spaced manner along the radial direction around the central axis of the second transmission assembly. This layout method is helpful to achieve load balancing and improve space utilization.

[0067] In some embodiments, a slider limiting rib 2-2 is provided in the first slider groove 2-1;

[0068] The first slider groove 2 - 1 is also provided with a clamping block 6 and a clamping block spring 7 , one end of the clamping block spring 7 is connected to the inner wall of the first slider groove 2 - 1 , and the other end of the clamping block spring 7 is connected to the slider 5 via the clamping block 6 .

[0069] It should be noted that the slider limiting rib 2-2 is used to limit the movement range of the slider 5 in the slot. The limiting rib can be a protruding rib, a baffle or other shapes, depending on specific design requirements.

[0070] The design purpose of the compression stopper 6 is to provide additional resistance or a locking function when the slider 5 moves to a specific position, so as to achieve the function of locking or maintaining the position of the slider 5.

[0071] One end of the compression stopper spring 7 is connected to the inner wall of the first slider groove 2-1, and the other end is connected to the slider 5 through the compression stopper 6. The function of the spring is to provide elastic force so that the compression stopper 6 can be closely attached to or lightly pressed on the slider 5.

[0072] Specifically, this embodiment is described by taking the first transmission assembly 2 and the second transmission assembly as an example, that is, a driving disk and a driven disk respectively. Figure 1 As shown, a compression block 6 with a spring is installed at each first slider slot 2-1 of the active disk; a slider 5 is installed in each second slider slot 1-8 of the driven disk, wherein the slider 5 has its head facing outward and its tail connected to a slider spring 4, and the other end of the slider spring 4 is connected to the driven structure 1-7. The slider spring 4 is located above the reset block 8, and no interference occurs during the movement.

[0073] In some embodiments, the traction unit includes an electromagnetic assembly 3, a reset block 8, and a reset block spring 9, one end of the reset block 8 is elastically connected to the electromagnetic assembly 3, the other end of the reset block 8 is connected to the first end of the reset block spring 9, and the second end of the reset block spring 9 is fixed to the reset block limit portion 1-4;

[0074] The reset block 8 is used to pull the slider 5 into or out of the first slider groove 2 - 1 .

[0075] It should be noted that the electromagnetic assembly 3 is a control element in the traction unit. It uses electromagnetic force to generate or eliminate the traction force on the reset block 8. The electromagnetic assembly 3 will have different magnetic poles corresponding to the different current directions passing through it. Different magnetic poles affect the moving direction of the reset block 8, so that the reset block 8 moves to the side of the electromagnetic assembly 3, or to the side of the reset block limiter 1-4.

[0076] As an example, the electromagnetic component 3 is a device that can adjust the direction of the magnetic pole and the magnitude of the magnetic force according to the direction and strength of the power supply, such as an electromagnet.

[0077] It is understandable that one end of the reset stopper 8 is elastically connected to the electromagnetic assembly 3, which means that there is a certain degree of freedom between them, but there is also enough rigidity to transmit force.

[0078] The other end of the reset stopper 8 is connected to a reset stopper spring 9, which provides a force for the reset stopper 8 to return to its original position.

[0079] When the electromagnetic assembly 3 absorbs the reset block 8, the reset block spring 9 is stretched, and when the magnetic fields of the electromagnetic assembly 3 and the reset block 8 repel each other, the reset block spring 9 is compressed.

[0080] Specifically, this embodiment is described by taking the first transmission assembly 2 and the second transmission assembly as an example, that is, a driving disk and a driven disk respectively. Figure 1 As shown, the driven disk is nested and installed in the center hole of the active disk and can rotate around it. There is a certain gap between the outer ring of the active disk and the inner ring of the driven disk. One end of the driven disk is connected to the half shaft (i.e., the transmission shaft) of the output device, and one end of the active disk is connected to the output of the electric drive system. The two can rotate around the axis to achieve the transmission or decoupling of the output power. A reset block 8 is installed in each second slider groove 1-8 of the driven disk, and a reset block spring 9 is connected away from the magnetic direction of the reset block 8. At the same time, the other end of the reset block spring 9 is fixed to the reset block limiter 1-4. The slider 5 and the reset block 8 can slide in the driven disk.

[0081] In one case, the reset block 8 is adsorbed by the electromagnetic assembly 3 under the action of the electromagnetic force, overcomes the pulling force of the reset block spring 9 and moves, and at the same time pushes the slider 5 to move outward and embed into the first slider groove 2-1. When the reset block 8 and the electromagnetic assembly 3 are adsorbed together, the slider 5 is embedded in the first slider groove 2-1. At this time, the slider 5 can stably transmit the torque. In another case, the reset block 8 receives the electromagnetic repulsive force from the electromagnetic assembly 3, compresses the reset block spring 9, and gradually approaches the side of the reset block limiter 1-4. In this process, the slider 5 is separated from the first slider groove 2-1.

[0082] In some embodiments, the second transmission component (such as Figure 2 As shown) includes an integrally formed driven structure 1-7 ( Figure 2 Inner ring) and connecting structure ( Figure 2 The remaining part except the driven structure 1-7, that is, the outer structure of the inner ring), the connection structure includes a plurality of reset block limit parts 1-4, a plurality of second slider grooves 1-8, and a plurality of slide rails 10 arranged in sequence; the second slider grooves 1-8 are arranged corresponding to the first slider grooves 2-1; the reset block limit part 1-4 is provided with a mounting groove 1-1 for accommodating the electromagnetic component 3, and the second slider groove 1-8 is provided with a slider guide block 1-2 on the side away from the driven structure 1-7;

[0083] The outer side of the driven structure 1-7 is provided with a reset block guide rib 1-3;

[0084] The outer side of the driven structure 1-7 is also provided with a first sensor 1-5 and a second sensor 1-6, and the first sensor 1-5 and the second sensor 1-6 are both arranged in cooperation with the reset block 8; the data collected by the first sensor 1-5 is used to determine whether the reset block 8 is connected to the electromagnetic component 3, and the data collected by the second sensor 1-6 is used to determine whether the reset block 8 is detached from the electromagnetic component 3.

[0085] It should be noted that the second slider groove 1-8 and the first slider groove 2-1 are arranged in the same position to correspond to each other, so that the slider 5 can be accurately embedded in the first slider groove 2-1, or detached from the first slider groove 2-1 and restored to the second slider groove 1-8.

[0086] The reset block guide ribs 1-3 play a guiding role.

[0087] When the reset block 8 touches the first sensor 1-5 or the second sensor 1-6, the sensor will output a relevant signal to achieve effective control and fault identification of the entire device. The data collected by the first sensor 1-5 is used to determine whether the reset block 8 reaches the specified position after being adsorbed by the electromagnetic component 3, and the data collected by the second sensor 1-6 is used to determine whether the reset block 8 compresses the reset block spring 9 and resets to the specified position close to the reset block limit 1-4 after receiving the electromagnetic repulsion force of the electromagnetic component 3. Of course, the judgment schemes of the two sensors can be swapped. This embodiment does not limit the specific types of the first sensor 1-5 and the second sensor 1-6.

[0088] The one-piece design of the driven structure 1-7 and the connecting structure makes the entire transmission assembly more compact and integrated, thereby shortening the axial distance.

[0089] Specifically, Figure 4 As shown, Figure 4 A schematic diagram of a power on-off device provided in an embodiment of the present application. When the power on-off device receives the engagement signal, the electromagnetic component (e.g., an electromagnet) is energized to the S pole (this embodiment does not limit this, and it specifically depends on the direction of the magnetic pole of the reset block close to the electromagnetic component. If the direction of the magnetic pole of the reset block close to the electromagnetic component is set to the N pole, then the electromagnetic component is energized to the S pole at this time. Conversely, this embodiment takes the direction of the magnetic pole of the reset block close to the electromagnetic component as the N pole as an example for explanation). The reset block is attracted by the electromagnetic component (e.g., an electromagnet) under the action of the electromagnetic force, overcomes the pulling force of the reset block spring and moves toward the electromagnetic component, while pushing the slider to move outward to engage with the first transmission component (e.g., an active disk). Specifically, the slider drives the clamping block to compress the clamping block spring to complete the engagement. After the engagement is completed, the slider partially falls back to prevent the reset slider from returning to its position, resulting in the failure of the device engagement. When the reset block is in place, the first sensor sends a signal, the electromagnetic component is powered off, and the overall engagement process is completed. See. Figure 1 When the power on-off device receives the disconnection signal, the electromagnetic assembly 3 is energized to the N pole, the reset block 8 receives the electromagnetic repulsion force, compresses the reset block spring 9, and the slider 5 is separated from the first slider groove 2-1 due to the action of the slider spring 4. At this time, the reset block 8 returns to the position as shown in FIG. Figure 1In the state shown, the slider 5 receives the retraction force of the slider spring 4 and the repulsive force of the clamping spring and returns to its original position. When the reset block 8 is completely returned to its original position, the second sensor 1-6 is triggered, and the second sensor 1-6 shows that the slider 5 is disconnected, the electromagnetic component 3 is powered off, and the device disconnection process is completed. When the device is in the disconnected state, each slider 5 is located inside the second slider groove 1-8. At this time, the device is in a power decoupling state. In this state, the second transmission component (for example, the driven disk) will also rotate. For the highest speed, the centrifugal force on the slider 5 is still not enough to overcome the tension of the slider spring 4. At the same time, the clamping block 6 and the clamping block spring 7 are used to avoid misengagement under any working condition. Among them, since there is a certain speed difference between the first transmission component 2 (for example, the active disk) and the second transmission component (for example, the driven disk), the slider 5 can be easily entered by adjusting the speed of the driving motor and setting a transition guide groove on the first transmission component 2 (for example, the active disk).

[0090] It is understandable that synchronously incorporating motor speed regulation in the control can achieve a more rapid and efficient integration.

[0091] It should be understood that the power on / off device may be set to be in an off state by default.

[0092] The power on-off device needs to re-magnetize the electromagnetic component 3 to the corresponding magnetic pole only after receiving the connection or disconnection signal, and does not require continuous electromagnetic action, thus saving energy consumption.

[0093] In some embodiments, see Figure 5-6 The slider 5 includes a first limiting portion 5-2 and a second limiting portion 5-3, and the reset block 8 includes a third limiting portion 8-3 matched with the first limiting portion 5-2 and a fourth limiting portion 8-2 matched with the second limiting portion 5-3.

[0094] Specifically, when the power on-off device is in the disconnected state, the second limit portion 5-3 cooperates with the fourth limit portion 8-2, and when it is in the engaged state, the first limit portion 5-2 cooperates with the second limit portion 5-3.

[0095] In some embodiments, the slider 5 is provided with a third slider groove 5 - 1 , and the third slider groove 5 - 1 is arranged in cooperation with the slider guide block 1 - 2 .

[0096] It should be noted that the slider guide block 1-2 prevents the slider 5 from falling out and guides it. The slider guide block 1-2 is embedded in the third slider groove 5-1. The number of the third slider groove 5-1 and the position of the slider guide block 1-2 are the same.

[0097] In some embodiments, the reset block 8 is provided with a reset block guide groove 8 - 1 which is arranged in cooperation with the slide track 10 , and a magnetic pole which is arranged in cooperation with the electromagnetic assembly 3 .

[0098] Specifically, the reset block 8 is an asymmetric structure, which has a reset block guide groove 8-1, and a side thereof close to the electromagnetic assembly 3 (ie, the position indicated by 8-4) has a specified magnetic pole direction.

[0099] The cooperation of the slide rail 10 and the reset block guide groove 8-1 ensures that the reset block 8 can accurately reach the specified position during the movement. In addition, the magnetic poles arranged on the reset block 8 interact with the electromagnetic assembly 3 to achieve control of the running direction of the reset block 8.

[0100] In addition, the embodiment of the present application also provides an on-off judgment method based on a power on-off device. The power on-off device can be provided with a control device or module for receiving engagement and disconnection signals, and controlling the first transmission component and the second transmission component to perform corresponding processing according to the engagement and disconnection signals. The data collected by the first sensor is used to judge whether the reset block is connected to the electromagnetic component, and the data collected by the second sensor is used to judge whether the reset block is detached from the electromagnetic component and close to the reset block limiter. Figure 7 As shown, Figure 7 A schematic diagram of the combination process of a power on-off device provided in an embodiment of the present application. When the power on-off device receives the combination signal, the second sensor determines whether the reset block is close to one side of the reset block limiter. If not, and the first sensor determines that the reset block is connected to the electromagnetic component, then the combination is completed. If the second sensor determines that the reset block is close to one side of the reset block limiter, and the first sensor determines that the reset block is connected to the electromagnetic component, then the device may have a fault and the combination fails. If the second sensor determines that the reset block is close to one side of the reset block limiter, and the first sensor determines that the reset block is not connected to the electromagnetic component, then the motor speed is adjusted to start the combination, and the first sensor re-judges. When the first sensor determines that the reset block is connected to the electromagnetic component, and the second sensor determines that the reset block is away from the reset block limiter, then the combination is completed; when the first sensor determines that the reset block is not connected to the electromagnetic component, it is determined whether the motor speed adjustment exceeds the number limit. This embodiment does not limit the number. Optionally, the number can be 2 times. If the number limit is exceeded, the combination fails. If the number limit is not exceeded, the speed is re-adjusted and the combination is started to complete the combination. Figure 8 As shown, Figure 8A schematic diagram of the disconnection process of a power on-off device provided in an embodiment of the present application. When the power on-off device receives a disconnection signal, the first sensor determines whether the reset block is connected to the electromagnetic assembly. If it is not connected to the electromagnetic assembly, and the second sensor determines that the reset block is close to the side of the reset block limiter, then the disconnection is completed. If the reset block is connected to the electromagnetic assembly, and the second sensor determines that the reset block is close to the side of the reset block limiter, at this time, the device may have a fault and the disconnection fails. If the reset block is connected to the electromagnetic assembly, and the second sensor determines that the reset block is far away from the side of the reset block limiter, the disconnection mechanism is started, and then the second sensor is used to determine whether the reset block is close to the side of the reset block limiter. When the reset block is far away from the side of the reset block limiter, it is determined whether the set disconnection times are exceeded. This embodiment does not limit the number of disconnections. If it does not exceed the number of disconnections, the disconnection mechanism is restarted until the disconnection is completed.

[0101] The above description is only an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0102] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0103] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A power on / off device for an electric drive system, characterized in that: The power on-off device includes a first transmission assembly, a second transmission assembly and a switch structure; the switch structure includes a slider disposed on the second transmission assembly and a first slider groove disposed on the first transmission assembly; the slider is disposed correspondingly to the first slider groove; wherein The first transmission assembly is connected to the electric drive system, and the second transmission assembly is connected to the transmission shaft; When the slider is inserted into the first slider groove, the first transmission assembly is connected to the second transmission assembly, and the electric drive system transmits power to the transmission shaft through the power on-off device; When the slider is disengaged from the first slider slot, the first transmission assembly is separated from the second transmission assembly.

2. The power on-off device according to claim 1, characterized in that: The first sliding block grooves are evenly distributed in rotational symmetry with respect to the center of the first transmission assembly.

3. The power on-off device according to claim 2, characterized in that: The switch structure further includes a pulling unit, and the pulling unit is used for pulling the slider to be embedded in or out of the first slider groove.

4. The power on-off device according to any one of claims 1 to 3, characterized in that: The switch structure comprises a plurality of switch structures, and the plurality of switch structures are radially spaced apart along the second transmission assembly.

5. The power on-off device according to claim 2, characterized in that: A slider limiting rib is provided in the first slider groove; The first slider groove is further provided with a clamping block and a clamping block spring, one end of the clamping block spring is connected to the inner wall of the first slider groove, and the other end of the clamping block spring is connected to the slider through the clamping block.

6. The power on-off device according to claim 3, characterized in that: The traction unit comprises an electromagnetic assembly, a reset block, and a reset block spring, one end of the reset block is elastically connected to the electromagnetic assembly, the other end of the reset block is connected to the first end of the reset block spring, and the second end of the reset block spring is fixed to the reset block limiting portion; The reset block is used to pull the slider into or out of the first slider groove.

7. The power on-off device according to any one of claims 1 to 6, characterized in that: The second transmission assembly includes an integrally formed driven structure and a connecting structure, wherein the connecting structure includes a plurality of reset block limiters, a plurality of second slider grooves, and a plurality of slide rails that are sequentially arranged at intervals; the second slider grooves are arranged corresponding to the first slider grooves; the reset block limiter is provided with a mounting groove for accommodating the electromagnetic assembly, and a slider guide block is provided on a side of the second slider groove away from the driven structure; The outer side of the driven structure is provided with a reset block guide rib; A first sensor and a second sensor are also provided on the outside of the driven structure, and the first sensor and the second sensor are both arranged in cooperation with the reset block; the data collected by the first sensor is used to determine whether the reset block is connected to the electromagnetic component, and the data collected by the second sensor is used to determine whether the reset block is detached from the electromagnetic component.

8. The power on-off device according to claim 6, characterized in that: The sliding block includes a first limiting portion and a second limiting portion, and the resetting stopper includes a third limiting portion matched with the first limiting portion and a fourth limiting portion matched with the second limiting portion.

9. The power on-off device according to claim 7, characterized in that: The slider is provided with a third slider groove, and the third slider groove is matched with the slider guide block.

10. The power on-off device according to claim 7, characterized in that: The reset stopper is provided with a reset stopper guide groove matched with the slide track and a magnetic pole matched with the electromagnetic assembly.

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