A deceleration control device for a vehicle motor

Abstract

The application relates to a deceleration control device of a vehicle motor, which comprises a transmission separation device, an acceleration detection device, a rotating speed detection device and a control device; the transmission separation device is additionally arranged between the output shaft of the vehicle motor and the wheel output shaft, so that the power output can be cut off under specific conditions; in addition, the acceleration detection device and the rotating speed detection device are arranged, the deceleration rate of the motor deceleration and the brake disc braking can be calibrated, then the obtained actual deceleration rate is compared with the calibrated deceleration rate, the specific deceleration condition can be obtained, corresponding operations are executed, and the driving safety is enhanced. The specific deceleration condition can be obtained, maintenance can be carried out after parking, or when the above-mentioned condition occurs, it is indicated that the braking system has problems, the driver can be reminded, and dangerous accidents can be avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile safety, in particular to a speed reduction control device of a vehicle motor. BACKGROUND

[0002] At present, the electric motor dedicated to new energy vehicles generates action by obtaining limited energy from the battery, so it is required to have good efficiency in various environments. Therefore, the performance is required to be more stringent than the general industrial motor. The motor suitable for electric vehicles needs to meet several characteristics: miniaturization and light weight (sturdiness) due to high speed, high efficiency (long driving range after one charge), constant output characteristic in a wide range under low speed and large torque, long service life and high reliability, low noise and low cost. However, a motor that meets all the above characteristics has not been developed in reality. At present, the motor more suitable for new energy vehicles is an alternating current asynchronous motor and a PM motor.

[0003] Since the three-phase induction motor cannot directly use direct current, an inverter device is needed for conversion control. When the new energy vehicle is decelerating or braking, the tire driven by inertia rotates the motor, which is in a generating braking state, charges the battery, realizes the conversion of mechanical energy into electrical energy, and the PWM power inverter composed of power semiconductor devices converts the direct current provided by the battery power supply into alternating current with adjustable frequency and amplitude. In addition, the three-in-one motor, controller and reducer can realize small size, high speed and light weight. The output torque and speed of the motor are controlled by the controller and the reducer.

[0004] In some related technologies, the new energy vehicle mainly relies on the brake disc and the motor to decelerate during deceleration, and finally achieves the purpose of braking. In some cases, the brake disc brake fails or the controller fails, so that the vehicle cannot be decelerated or braked after the brake pedal is stepped on, thereby causing serious accidents. Therefore, a speed reduction device is needed to improve the safety of the vehicle. SUMMARY

[0005] The embodiment of the present application provides a speed reduction control device of a vehicle motor to solve the problem that the vehicle cannot be decelerated or braked after the brake pedal is stepped on in the related art, thereby causing serious accidents.

[0006] In a first aspect, a speed reduction control device of a vehicle motor is provided, which comprises:

[0007] A transmission separation device, which is connected to the output shaft of the vehicle motor and the wheel drive shaft at both ends, respectively, to cut off or connect the power connection between the output shaft of the vehicle motor and the wheel drive shaft;

[0008] An acceleration detection device for detecting the acceleration of the output shaft of the vehicle motor;

[0009] A rotational speed detection device is arranged on a caliper of a brake disc, and includes a detection wheel rotating with the brake disc, the detection wheel being used to detect the rotational speed of the brake disc;

[0010] A control device is connected to the transmission separation device, the acceleration detection device and the rotational speed detection device, and is used to control the vehicle motor and the transmission separation device according to the acceleration and the rotational speed.

[0011] In some embodiments, the transmission separation device includes:

[0012] A flying disc is fixedly connected to an output shaft of the vehicle motor on one side, and is provided with a mounting groove on the other side, the mounting groove being provided with a circularly distributed limiting slot;

[0013] A follower disc is provided with a clamping block clamped with the limiting slot on one side, and is provided with a connecting rod on the other side, the diameter of the follower disc being less than or equal to the diameter of the mounting groove;

[0014] A plurality of pushing assemblies are arranged on the outer periphery of the flying disc with the center of the mounting groove as the center, and are distributed around the connecting rod, the pushing assembly being provided with an extension part moving along the axial direction of the connecting rod, the extension part being fixedly connected to the follower disc and being used to axially move the follower disc to separate or connect the follower disc with the flying disc;

[0015] A connector is used to connect the connecting rod with a wheel driving shaft, and is used to move the connecting rod only in the axial direction of the connecting rod.

[0016] In some embodiments, the pushing assembly includes:

[0017] An L-shaped clamping jaw is provided with a first connecting block and a second connecting block perpendicular to each other, the length of the first connecting block being greater than that of the second connecting block, the first connecting block being detachably connected to the flying disc through a bolt, extending along the axial direction of the connecting rod, and forming a space accommodating the follower disc together with the second connecting block;

[0018] An extension part is arranged in the space and is connected to the control device, the extension part extending and retracting along the axial direction of the connecting rod to push the follower disc to approach or move away from the flying disc.

[0019] In some embodiments, the connector includes:

[0020] A sleeve is provided with a hexagonal sliding groove in the sleeve, and is provided with a circular hole at one end of the sleeve, the circular hole being in communication with the hexagonal sliding groove, the area of the circular hole being less than that of the hexagonal sliding groove, and the connecting rod being arranged to pass through the circular hole, the other end of the sleeve being connected to the wheel driving shaft;

[0021] A hexagonal sliding block is arranged to slide in the hexagonal sliding groove and is connected to the connecting rod.

[0022] In some embodiments, the acceleration detection device adopts an acceleration sensor and is installed on the L-shaped claw.

[0023] In some embodiments, the center of the follow-up disc is provided with a mounting hole.

[0024] The end of the connecting rod in contact with the follow-up disc is provided with a threaded hole; the follow-up disc is detachably connected with the connecting rod through a mounting screw and the threaded hole.

[0025] In some embodiments, the rotation speed detection device further comprises a bracket connected with the caliper, the bracket is provided with a U-shaped frame, the U-shaped frame is provided with a rotating shaft, the rotating shaft is installed in the U-shaped frame through an angle sensor, and the detection wheel is arranged on the rotating shaft.

[0026] In some embodiments, an elastic member is arranged between the bracket and the U-shaped frame.

[0027] In a second aspect, a control method of a deceleration control device of a vehicle motor is provided, comprising the following steps:

[0028] The acceleration detection device and the rotation speed detection device are calibrated to obtain standard deceleration rate data, the standard deceleration rate data including the deceleration rates of the acceleration detection device and the rotation speed detection device when decelerating alone and when decelerating together;

[0029] The control device is used to obtain judgment data, the judgment data including the signal of the vehicle brake pedal, the acceleration of the output shaft of the vehicle motor detected by the acceleration detection device, and the rotation speed of the detection brake disc detected by the rotation speed detection device;

[0030] Based on the judgment data and the standard deceleration rate data, mode judgment is performed to obtain an execution instruction;

[0031] The operation of the vehicle motor and the transmission separation device is controlled according to the execution instruction.

[0032] In some embodiments, the standard deceleration rate data includes a first standard, a second standard and a third standard, the first standard being the deceleration rate of the vehicle motor when decelerating alone, the second standard being the deceleration rate of the brake disc and the caliper when braking alone, and the third standard being the deceleration rate of the vehicle motor when decelerating and the brake disc and the caliper when braking together.

[0033] When the brake pedal signal is detected and the deceleration rates of the acceleration and the rotation speed are equal to the first standard, it is determined that the brake braking fails, and a first instruction is sent; the first instruction is that the vehicle motor reverses to brake.

[0034] When the brake pedal signal is detected, and the deceleration rate of the acceleration and the rotation speed is equal to the second standard, the vehicle motor deceleration failure mode is determined, and the second instruction is sent; the second instruction is to continue to use the brake caliper to reverse brake; when the brake pedal signal is detected, and the deceleration rate of the acceleration and the rotation speed is between the first standard and the second standard, the motor control disorder mode is determined, and the third instruction is sent to the transmission separation device, and the third instruction is to disconnect the power of the wheel drive shaft.

[0035] When the brake pedal signal is detected, and the deceleration rate of the acceleration and the rotation speed is between the first standard and the second standard, the motor control disorder mode is determined, and the third instruction is sent to the transmission separation device, and the third instruction is to disconnect the power of the wheel drive shaft.

[0036] The technical scheme provided by the application has the beneficial effects of:

[0037] (1) The vehicle motor deceleration control method and the control device provided by the embodiment of the application, because the transmission separation device is additionally arranged between the output shaft of the vehicle motor and the wheel output shaft, the power output can be disconnected under certain conditions; in addition, because the acceleration detection device and the rotation speed detection device are arranged, the deceleration rates of the motor deceleration and the brake disc brake can be calibrated, and then the actual deceleration rate obtained is compared with the calibrated deceleration rate, so that the specific situation of the deceleration can be obtained, and corresponding operations can be performed, thereby enhancing the driving safety.

[0038] (2) The transmission separation device comprises: a flying disc, one side of which is fixedly connected with the output shaft of the vehicle motor; the other side of the flying disc is provided with a mounting groove, and the mounting groove is provided with a limiting clamping groove in a circular distribution; a following disc, the diameter of which is less than or equal to the diameter of the mounting groove, and the following disc is provided with a clamping block clamped with the limiting clamping groove on one side, and is provided with a connecting rod on the other side; a plurality of pushing assemblies, which are installed on the outer periphery of the flying disc with the center of the mounting groove as the center, and are distributed around the connecting rod; the pushing assembly has an extension part moving in the axial direction of the connecting rod; the extension part is fixedly connected with the following disc and is used for axially moving the following disc to separate or connect with the flying disc; and a connector connects the connecting rod with the wheel drive shaft and makes the connecting rod move only in the axial direction of the connecting rod. The above structure uses the principle similar to the clutch to ensure stable power transmission in normal state and disconnect the power connection under certain conditions.

[0039] (3) The rotation speed detection device further comprises a bracket connected with the caliper, the bracket is provided with a U-shaped frame, the U-shaped frame is provided with a rotating shaft, the rotating shaft is installed in the U-shaped frame through an angle sensor, and a detection wheel is arranged on the rotating shaft. The above structure realizes real-time detection of the rotation speed of the tire and can actually reflect the braking result. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0041] Figure 1 The overall structural schematic diagram of the transmission separation device provided by the embodiments of the present application is shown in the figure.

[0042] Figure 2 The exploded schematic diagram of the transmission separation device provided by the embodiments of the present application is shown in the figure.

[0043] Figure 3 The exploded schematic diagram of the transmission separation device provided by the embodiments of the present application is shown in the figure.

[0044] Figure 4 The schematic diagram of the connection between the pushing assembly and the connector provided by the embodiments of the present application is shown in the figure.

[0045] Figure 5 The schematic diagram of the connection between the pushing assembly and the connector provided by the embodiments of the present application is shown in the figure.

[0046] Figure 6 The specific structure of the pushing assembly provided by the embodiments of the present application is shown in the figure.

[0047] Figure 7 The structural schematic diagram of the brake disc and the rotational speed detection device provided by the embodiments of the present application is shown in the figure.

[0048] Figure 8 The structural schematic diagram of the rotational speed detection device provided by the embodiments of the present application is shown in the figure.

[0049] Figure 9 The structural schematic diagram of the rotational speed detection device provided by the embodiments of the present application is shown in the figure.

[0050] Figure 10 The general flowchart of the control method provided by the embodiments of the present application is shown in the figure.

[0051] In the figure: 1, transmission separation device; 100, flying disc; 101, limiting clamping groove; 102, follow-up disc; 103, connecting rod; 104, pushing assembly; 1041, telescopic part; 1042, L-shaped clamping jaw; 105, connector; 1051, sleeve; 1052, hexagonal sliding groove; 1053, hexagonal sliding block; 2, vehicle motor; 3, rotational speed detection device; 300, detection wheel; 301, U-shaped frame; 302, support; 303, elastic member; 4, brake disc; 5, wheel driving shaft. DETAILED DESCRIPTION

[0052] In order to make the purposes, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort are within the protection scope of the present application.

[0053] The embodiments of the present application provide a speed reduction control method and control device of a vehicle motor, to solve the problem that in the prior art, after the brake pedal is stepped on, speed reduction or braking cannot be performed, thus causing serious accidents.

[0054] Please refer to Figures 1-10 A speed reduction control device of a vehicle motor, comprising:

[0055] A transmission separation device 1, which is connected with an output shaft of a vehicle motor 2 and a wheel driving shaft 5 at two ends respectively, to cut off or connect the power connection between the output shaft of the vehicle motor 2 and the wheel driving shaft 5; an acceleration detection device, which is used to detect the acceleration of the output shaft of the vehicle motor 2; a rotating speed detection device 3, which is used to be installed on a caliper of a brake disc 4, and which comprises a detection wheel 300 rotating with the brake disc 4, the detection wheel 300 being used to detect the rotating speed of the brake disc 4; a control device, which is connected with the transmission separation device 1, the acceleration detection device, and the rotating speed detection device 3, and which is used to control the vehicle motor 2 and the transmission separation device 1 according to the acceleration and the rotating speed.

[0056] The transmission separation device 1 is additionally arranged between the output shaft of the vehicle motor 2 and the wheel output shaft, so that the power output can be cut off under certain conditions; in addition, due to the arrangement of the acceleration detection device and the rotating speed detection device 3, the speed reduction rate of the motor and the speed reduction rate of the brake disc 4 can be calibrated, then the obtained actual speed reduction rate is compared with the calibrated speed reduction rate, so that the specific speed reduction condition can be obtained, to perform corresponding operation, thus enhancing the driving safety.

[0057] In addition, the use of the above device can obtain the specific speed reduction condition, to facilitate maintenance after parking, or to remind the driver when the above condition occurs, to avoid dangerous accidents.

[0058] The sensor measures the acceleration at each moment, so that a function of the acceleration a with respect to t can be obtained.

[0059] a=f(t).

[0060] The acceleration a is the derivative of the velocity, i.e. a = dv / dt. It can be derived that the velocity v = ∫adt. Thus, a function of the velocity v = g(t) = ∫adt can be obtained.

[0061] In some preferred embodiments, the structure of the transmission separation device 1 is specifically described, specifically:

[0062] The transmission separation device 1 comprises:

[0063] The flying disc 100 is fixedly connected to the output shaft of the vehicle motor 2 on one side, and is provided with a mounting groove on the other side, and the mounting groove is provided with a limiting clamping groove 101 distributed in a circular shape;

[0064] The following is described in detail. The follower disc 102 has a diameter less than or equal to the diameter of the mounting groove, and is provided with a clamping block clamped with the limiting clamping groove 101 on one side, and is provided with a connecting rod 103 on the other side; a plurality of push assemblies 104 are installed on the outer periphery of the flying disc 100 with the center of the mounting groove as the center, and are distributed around the connecting rod 103; the push assembly 104 has an extension part 1041 moving in the axial direction of the connecting rod 103; the extension part 1041 is fixedly connected with the follower disc 102 and is used to axially move the follower disc 102 to separate or connect with the flying disc 100; the connector 105 connects the connecting rod 103 with the wheel driving shaft 5 and makes the connecting rod 103 move only in its own axial direction.

[0065] The push assembly 104 comprises: an L-shaped clamping jaw 1042 having a first connecting block and a second connecting block perpendicular to each other, the length of the first connecting block being greater than that of the second connecting block; the first connecting block is detachably connected with the flying disc 100 through a bolt and extends in the axial direction of the connecting rod 103, and cooperates with the second connecting block to form a space for accommodating the follower disc 102; the extension part 1041 is arranged in the space and is connected with the control device, and the extension part 1041 extends and retracts in the axial direction of the connecting rod 103 to push the follower disc 102 to approach or move away from the flying disc 100.

[0066] The connector 105 comprises: a sleeve 1051 provided with a hexagonal sliding groove 1052 inside, and one end of the sleeve 1051 is provided with a circular hole in communication with the hexagonal sliding groove 1052, the area of the circular hole being smaller than that of the hexagonal sliding groove 1052 and being provided for the connecting rod 103 to pass through; the other end of the sleeve 1051 is connected with the wheel driving shaft 5; a hexagonal sliding block 1053 is slidably arranged in the hexagonal sliding groove 1052 and is connected with the connecting rod 103. The acceleration detection device adopts an acceleration sensor and is installed on the L-shaped clamping jaw 1042.

[0067] Through the above setting, by using the principle similar to the clutch, it is ensured that the power is stably transmitted in normal state and disconnected in specific situation, wherein the hexagonal sliding groove 1052 and the hexagonal sliding block 1053 ensure the axial movement of the follower disc 102, but do not rotate, so as to ensure the stable transmission of power.

[0068] Further, in order to facilitate the installation of the above structure, the center of the follower disc 102 is provided with a mounting hole; the end of the connecting rod 103 in contact with the follower disc 102 is provided with a threaded hole; the follower disc 102 is detachably connected with the connecting rod 103 through the mounting screw and the threaded hole.

[0069] In some preferred embodiments, the structure of the rotation speed detection device 3 is specifically described, which is as follows:

[0070] The rotation speed detection device 3 further comprises a bracket 302 connected with the caliper, and the bracket 302 is provided with a U-shaped frame 301, and a rotating shaft is arranged in the U-shaped frame 301, the rotating shaft is arranged in the U-shaped frame 301 through an angle sensor, and the detection wheel 300 is arranged on the rotating shaft. The outer surface of the detection wheel 300 is provided with a wear-resistant coating.

[0071] Further, in order to ensure the rotation of the brake disc 4, the contact force between the detection wheel 300 and the brake disc 4 needs to be set, and the contact force is provided with a certain elasticity, so that the bracket 302 and the U-shaped frame 301 are provided with an elastic member 303. The detection wheel 300 is supported by metal, which has good wear resistance and heat dissipation effect.

[0072] The application also proposes a control method of the speed reduction control device of the vehicle motor, which comprises the following steps:

[0073] The acceleration detection device and the rotation speed detection device 3 are calibrated to obtain the speed reduction rate standard data, and the speed reduction rate standard data includes the speed reduction rate of the acceleration detection device and the rotation speed detection device 3 separately and jointly;

[0074] The control device is used to obtain the judgment data, the judgment data includes the signal of the vehicle brake pedal, the acceleration of the output shaft of the vehicle motor 2 detected by the acceleration detection device, and the rotation speed of the detection brake disc 4 detected by the rotation speed detection device 3; based on the judgment data and the speed reduction rate standard data, the mode is judged to obtain the execution instruction; and the operation of the vehicle motor 2 and the transmission separation device 1 is controlled according to the execution instruction.

[0075] The speed reduction rate standard data includes a first standard, a second standard and a third standard, the first standard is the speed reduction rate of the vehicle motor 2 separately; the second standard is the speed reduction rate of the brake disc 4 and the caliper separately; and the third standard is the speed reduction rate of the vehicle motor 2 and the brake disc 4 and the caliper jointly;

[0076] When the brake pedal signal is detected, and the deceleration rate of acceleration and rotation speed is equal to the first standard, then it is the brake failure mode, and the first instruction is sent; the first instruction is that the vehicle motor 2 performs reverse rotation braking;

[0077] When the brake pedal signal is detected, and the deceleration rate of acceleration and rotation speed is equal to the second standard, then it is the motor 2 deceleration failure mode, and the second instruction is sent; the second instruction is to continue to use the brake caliper to perform reverse rotation braking; when the brake pedal signal is detected, and the deceleration rate of acceleration and rotation speed is equal to the third standard, then it is the normal mode, and no instruction is sent;

[0078] When the brake pedal signal is detected, and the deceleration rate of acceleration and rotation speed is between the first standard and the second standard, then it is the motor control disorder mode, and the third instruction is sent to the transmission separation device 1, and the third instruction is to disconnect the power of the wheel drive shaft 5.

[0079] Through the above steps, the specific deceleration condition can be obtained, which is convenient for maintenance after parking, or when the above conditions occur, it indicates that the brake system has a problem, which can remind the driver and avoid dangerous accidents. For example, the above calibrated deceleration rate standard data is set as a critical value, when the position critical value, it indicates that the brake deceleration system has a certain problem. Thus, the function of early warning is realized to avoid accidents.

[0080] In the description of the present application, it should be noted that the positions or position relationships indicated by the terms "upper", "lower", etc. are based on the positions or position relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular position, be constructed and operated in a particular position, and therefore cannot be understood as a limitation on the present application. Unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0081] It should be noted that, in the present application, the relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another, without necessarily requiring or implying any actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0082] The foregoing is merely illustrative of the principles of the application and various modifications can be made by those skilled in the art without departing from the spirit and scope of the application. The above embodiments are illustrative, and not restrictive, of the scope of the application.

Claims

1. A deceleration control device for a vehicle motor, characterized in that, It includes: A transmission separation device (1) is connected at both ends to the output shaft of a vehicle motor (2) and the wheel drive shaft (5) respectively, so as to disconnect or connect the power connection between the output shaft of the vehicle motor (2) and the wheel drive shaft (5); the transmission separation device (1) includes: a fly disc (100), one side of which is fixedly connected to the output shaft of the vehicle motor (2); the other side of which is provided with a mounting groove, and the mounting groove is provided with a circularly distributed limiting slot (101); a follower disc (102), the diameter of which is less than or equal to the diameter of the mounting groove, and one side of which is provided with a locking block that engages with the limiting slot (101), and the other side of which is provided with a connecting block. Connecting rod (103); a plurality of push assemblies (104) mounted on the outer periphery of the flying disc (100) with the center of the mounting slot and distributed around the connecting rod (103); the push assembly (104) has a telescopic part (1041) that moves axially along the connecting rod (103); the telescopic part (1041) is fixedly connected to the follower disc (102) and is used to move the follower disc (102) axially to separate or connect with the flying disc (100); connector (105) that connects the connecting rod (103) to the wheel drive shaft (5) and allows the connecting rod (103) to move only in its own axial direction; The pushing assembly (104) includes: an L-shaped claw (1042) having a first connecting block and a second connecting block perpendicular to each other, the length of the first connecting block being greater than that of the second connecting block; the first connecting block being detachably connected to the flying disc (100) by bolts and extending along the axial direction of the connecting rod (103), and cooperating with the second connecting block to form a space for accommodating the follower disc (102); and a telescopic part (1041) disposed in the space and connected to the control device, the telescopic part (1041) extending and retracting along the axial direction of the connecting rod (103) to push the follower disc (102) closer to and away from the flying disc (100). An acceleration detection device is used to detect the acceleration of the output shaft of the vehicle motor (2); A speed detection device (3) is used to be mounted on the caliper of the brake disc (4), and it includes a detection wheel (300) that rotates with the brake disc (4) and is used to detect the speed of the brake disc (4); A control device, which is connected to the transmission separation device (1), the acceleration detection device and the speed detection device (3), and is used to control the vehicle motor (2) and the transmission separation device (1) according to the acceleration and speed.

2. The vehicle motor deceleration control device as described in claim 1, characterized in that, The connector (105) includes: The sleeve (1051) has a hexagonal groove (1052) inside, and one end of the sleeve has a circular hole communicating with the hexagonal groove (1052). The area of ​​the circular hole is smaller than the area of ​​the hexagonal groove (1052) and allows the connecting rod (103) to pass through. The other end of the sleeve (1051) is connected to the wheel drive shaft (5). A hexagonal slider (1053) is slidably disposed in a hexagonal groove (1052) and connected to a connecting rod (103).

3. The vehicle motor deceleration control device as described in claim 1, characterized in that: The acceleration detection device uses an acceleration sensor and is mounted on an L-shaped chuck (1042).

4. The vehicle motor deceleration control device as described in claim 1, characterized in that: The follower disk (102) has a mounting hole at its center; The connecting rod (103) has a threaded hole at the end that contacts the follower plate (102); the follower plate (102) is detachably connected to the connecting rod (103) by mounting screws and the threaded hole.

5. The vehicle motor deceleration control device as described in claim 1, characterized in that: The speed detection device (3) also includes a bracket (302) connected to the caliper. A U-shaped frame (301) is provided on the bracket (302). A rotating shaft is provided inside the U-shaped frame (301). The rotating shaft is installed inside the U-shaped frame (301) through an angle sensor. The detection wheel (300) is set on the rotating shaft.

6. The vehicle motor deceleration control device as described in claim 5, characterized in that: An elastic element (303) is provided between the bracket (302) and the U-shaped frame (301).

7. A control method for a vehicle motor deceleration control device as described in claim 1, characterized in that, Includes the following steps: The acceleration detection device and the rotation speed detection device (3) are calibrated to obtain deceleration rate standard data, which includes the deceleration rates of the acceleration detection device and the rotation speed detection device (3) decelerating individually and decelerating together. The judgment data is obtained by using the control device. The judgment data includes the signal of the vehicle brake pedal, the acceleration of the output shaft of the vehicle motor (2) detected by the acceleration detection device, and the rotational speed of the detection brake disc (4) detected by the rotational speed detection device. Based on the judgment data and deceleration rate standard data, a mode judgment is performed to derive the execution command; The vehicle motor (2) and transmission separation device (1) are controlled according to the execution command.

8. The control method of the vehicle motor deceleration control device as described in claim 7, characterized in that: The deceleration rate standard data includes a first standard, a second standard and a third standard. The first standard is the deceleration rate when the vehicle motor (2) decelerates alone; the second standard is the deceleration rate when the brake disc (4) and caliper brake alone brake; and the third standard is the deceleration rate when the vehicle motor (2) decelerates and the brake disc (4) and caliper brake together brake. When a brake pedal signal is detected and the deceleration rate of acceleration and rotation speed is equal to the first standard, the brake failure mode is activated and a first command is sent; the first command is for the vehicle motor (2) to perform reverse braking. When a brake pedal signal is detected and the deceleration rate of acceleration and rotation speed is equal to the second standard, the vehicle motor (2) deceleration failure mode is activated, and a second command is sent. The second command is to continue to use the brake caliper for reverse braking. When a brake pedal signal is detected and the deceleration rate of acceleration and rotation speed is equal to the third standard, the normal mode is activated, and no command is sent. When a brake pedal signal is detected and the deceleration rate of acceleration and rotation speed is between the first and second standards, the motor control disorder mode is activated, and a third command is sent to the transmission disconnect device (1). The third command is to disconnect the power of the wheel drive shaft (5).

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