Automobile tailgate lifting motor

Abstract

The present invention provides a motor for lifting a tailgate of an automobile, and relates to the technical field of motor equipment, including an electronic brake assembly, a housing, and a main shaft, wherein the housing is mounted on the electronic brake assembly, the main shaft is rotatably connected in the housing through a rotor-stator structure, and one end of the main shaft is connected to the electronic brake assembly; the main shaft includes a sleeve, a telescopic shaft 1, and a telescopic shaft 2, the sleeve is rotatably connected in the housing, the telescopic shaft 1 is slidably connected in the sleeve, the telescopic shaft 2 is slidably connected in the telescopic shaft 1, the telescopic shaft 1 and the telescopic shaft 2 are respectively provided with a plurality of positioning holes 1 and a plurality of positioning holes 2, the telescopic shaft 1 is hinged with a buckle, and the sleeve and the telescopic shaft 1 are connected by a positioning nail; and also includes a heat dissipation system and a real-time fault monitoring system. The present invention improves the flexibility of adapting the tailgate lifting motor of an automobile to a hydraulic component through the retractable design of the main shaft.

Description

Technical Field

[0001] The invention belongs to the technical field of motor equipment, and in particular relates to a motor for lifting a tailgate of an automobile. Background Art

[0002] The automobile tailgate lifting motor is an electric drive device that controls the hydraulic components through rotation to control the lifting and lowering of the automobile tailgate, so as to facilitate loading and unloading of goods;

[0003] Since the automobile tailgate lifting motor and its corresponding hydraulic components are in harsh environments for a long time, they will be repaired and replaced frequently, and the corresponding specifications and models will be different each time. The existing automobile tailgate lifting motor cannot change its main shaft length to its inherent length, which reduces its flexibility in adapting to the hydraulic components. Summary of the invention

[0004] The present invention provides a car tailgate lifting motor to solve at least one of the above-mentioned technical problems.

[0005] In order to solve the above technical problems, the present invention discloses a car tailgate lifting motor, comprising an electronic brake assembly, a housing and a main shaft, wherein the housing is mounted on the electronic brake assembly, the main shaft is rotatably connected in the housing through a rotor-stator structure, and one end of the main shaft is connected to the electronic brake assembly;

[0006] The main shaft includes a shaft sleeve, a telescopic shaft 1 and a telescopic shaft 2, the shaft sleeve is rotatably connected in the housing, the telescopic shaft 1 is slidably connected in the shaft sleeve, the telescopic shaft 2 is slidably connected in the telescopic shaft 1, a plurality of positioning holes 1 and a plurality of positioning holes 2 are respectively provided on the telescopic shaft 1 and the telescopic shaft 2, a pressing buckle is hingedly connected on the telescopic shaft 1, and the shaft sleeve and the telescopic shaft 1 are connected by positioning nails;

[0007] It also includes a heat dissipation system and a real-time fault monitoring system. The heat dissipation system is used to dissipate heat from the lifting motor, and the real-time fault monitoring system is used to monitor faults of the lifting motor. The heat dissipation system includes a heat dissipation prediction control module and a heat dissipation execution module. The heat dissipation prediction control module is used to predict the future temperature development trend of the lifting motor and control the heat dissipation execution module to perform heat dissipation operations.

[0008] Preferably, the rotor-stator structure comprises an upper wire frame, which is installed in the casing, and the upper wire frame is installed with enameled wire and stator core, and a wire passing plate is installed in the casing, one end of the enameled wire is connected to the coil of the stator core, and the other end is connected to the external power supply through the wire passing plate, and the Hall plate is installed on the upper wire frame;

[0009] A rotor core is mounted on the main shaft, and a magnetic steel is mounted on the rotor core.

[0010] Preferably, a front cover is installed on the casing, an oil seal and a deep groove ball bearing are provided between the front cover and the main shaft, and a sealing ring is provided between the front cover and the casing;

[0011] A sealing ring 2 is arranged between the electronic brake assembly and the casing, one end of the main shaft close to the electronic brake assembly is connected to the casing through a deep groove ball bearing 2, and a waterproof joint is arranged on the casing.

[0012] Preferably, the lifting motor has a stack height of 40 mm, adopts a 12-slot 8-pole winding, has a rated voltage of 24 V, and a rated power of 1200 watts.

[0013] Preferably, the heat dissipation execution module includes:

[0014] A radiator and a heat exchanger, wherein the radiator is mounted outside the casing and the heat exchanger is mounted inside the casing and contacts the inside of the radiator;

[0015] The coolant pipeline has two open ends respectively installed at the inlet and outlet of the pump body, the pump body is installed in the casing, the coolant pipeline, the pump body and the heat exchange tube of the heat exchanger form a heat dissipation loop, and the coolant is arranged in the heat dissipation loop. The heat dissipation loop flows through the stator core of the rotor-stator structure and then flows into the heat exchanger.

[0016] Preferably, the heat dissipation prediction control module includes:

[0017] A temperature acquisition unit, the temperature acquisition unit comprises a plurality of temperature sensors installed on the inner wall of the casing, and the plurality of temperature sensors are evenly arranged along the axial direction of the main shaft;

[0018] A matrix construction unit, used for constructing a temperature rise prediction matrix of the lifting motor based on the collection result of the temperature collection unit;

[0019] The control unit is used to compare the predicted temperature value inside the motor in the next acquisition cycle obtained based on the lifting motor temperature rise prediction matrix with the heat dissipation trigger temperature value. If the predicted temperature value inside the motor is greater than the heat dissipation trigger temperature value, the heat dissipation execution module is started, otherwise it is not started.

[0020] Preferably, the matrix construction unit comprises:

[0021] The sorting subunit arranges all the temperature values ​​collected by each temperature sensor in time sequence to form a sequence 1;

[0022] The difference acquisition unit calculates the difference between the arranged temperature values ​​and the corresponding temperature values ​​on the left and right sides thereof, respectively, to obtain the left difference value and the right difference value corresponding to each temperature value, sets the left difference value of the first temperature value to a value equal to its right difference value, sets the right difference value of the last temperature value to a value equal to its left difference value, arranges the left difference value of each temperature sensor temperature value in the order of the corresponding temperature values ​​to form a second sequence, and arranges the right difference value of each temperature sensor temperature value in the order of the corresponding temperature values ​​to form a third sequence;

[0023] The matrix construction subunit constructs the matrix by taking sequence 1, sequence 2 and sequence 3 as the first row, second row and third row of the lifting motor temperature rise prediction matrix respectively:

[0024] ;in, is the temperature rise prediction matrix of the lifting motor in the area corresponding to the i-th temperature sensor, is the first temperature value of the sequence 1 corresponding to the i-th temperature sensor, is the second temperature value of the sequence 1 corresponding to the i-th temperature sensor, is the nth temperature value of the sequence 1 corresponding to the i-th temperature sensor, is the first temperature value of the second series corresponding to the i-th temperature sensor, is the second temperature value of sequence 2 corresponding to the i-th temperature sensor, is the nth temperature value of the sequence 2 corresponding to the i-th temperature sensor, is the first temperature value of the sequence 3 corresponding to the i-th temperature sensor, is the second temperature value of sequence 3 corresponding to the i-th temperature sensor, is the nth temperature value of sequence 3 corresponding to the i-th temperature sensor;

[0025] The prediction subunit obtains the detection value of each temperature sensor in the next acquisition cycle based on the lifting motor temperature rise prediction matrix of the corresponding area of ​​each temperature sensor, and calculates the average of the detection values ​​of each temperature sensor in the next acquisition cycle as the predicted temperature value inside the motor in the next acquisition cycle.

[0026] Preferably, obtaining the detection value of each temperature sensor in the next acquisition cycle based on the lift motor temperature rise prediction matrix of the area corresponding to each temperature sensor includes:

[0027] Obtain the mean of all matrix elements in the third row of the lifting motor temperature rise prediction matrix for the area corresponding to each temperature sensor, and set the value of the last column of the lifting motor temperature rise prediction matrix for the area corresponding to each temperature sensor to a value equal to the mean of all matrix elements in the third row, thereby obtaining a new matrix, and using the rank of the new matrix as the detection value of the next acquisition cycle of each temperature sensor.

[0028] Preferably, the real-time fault monitoring system comprises:

[0029] An operation data acquisition module is used to collect the operation data of the deep groove ball bearing 1, the main shaft, the enameled wire, the stator core, the magnetic steel and the Hall plate in each monitoring cycle, and calculate the actual operation status evaluation values ​​of the deep groove ball bearing 1, the main shaft, the enameled wire, the stator core, the magnetic steel and the Hall plate in each monitoring cycle based on the operation data;

[0030] A fault monitoring matrix building module is used to build a lift motor fault monitoring matrix based on the actual operating status evaluation values ​​of the deep groove ball bearing, the main shaft, the enameled wire, the stator core, the magnetic steel and the Hall plate in each monitoring cycle;

[0031] Early warning module, when the value of an element in a column of the lifting motor fault monitoring matrix is ​​negative, an alarm level is recorded. The alarm levels are divided into level 1 alarm, level 2 alarm, level 3 alarm, level 4 alarm, level 5 alarm and level 6 alarm. When the value of an element in a column of the lifting motor fault monitoring matrix is ​​not negative, the lifting motor is operating normally.

[0032] Preferably, the lifting motor fault monitoring matrix:

[0033] ;in, It is the lifting motor fault monitoring matrix.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] 1. The present invention improves the flexibility of the adaptation between the automobile tailgate lifting motor and the hydraulic assembly through the retractable design of the main shaft;

[0036] 2. The design of the heat dissipation execution module of the present invention realizes efficient heat dissipation management of the lifting motor, which has the effect of improving system efficiency and extending equipment life;

[0037] 3. The heat dissipation prediction control module of the present invention predicts the predicted temperature value inside the motor in the next acquisition cycle, thereby starting the heat dissipation execution module in advance, effectively predicting the temperature change trend, reducing the occurrence of sudden accidents caused by sudden temperature changes, and effectively extending the life of the motor;

[0038] 4. The real-time fault monitoring system of the present invention can realize real-time monitoring of the operating status of the lifting motor and issue an early warning prompt when the lifting motor is in a poor operating state, thereby avoiding accidents when the car tailgate is actually used. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0040] Figure 1 It is an overall cross-sectional view of the present invention;

[0041] Figure 2 A schematic diagram of the main shaft structure of the present invention;

[0042] Figure 3 A top view of the lifting motor of the present invention;

[0043] Figure 4 A three-dimensional view of the lifting motor of the present invention;

[0044] Figure 5 This is a schematic diagram of the structure of the electronic brake assembly of the present invention.

[0045] In the figure: 1. main shaft; 100. bushing; 101. telescopic shaft one; 102. telescopic shaft two; 103. buckle; 104. positioning hole one; 105. positioning hole two; 106. positioning pin; 2. oil seal; 3. front cover; 4. deep groove ball bearing one; 5. sealing ring one; 6. wire rack; 7. magnetic steel; 8. stator core; 9. enameled wire; 10. rotor core; 11. wire plate; 12. sealing ring two; 13. deep groove ball bearing two; 14. electronic brake assembly; 15. waterproof connector; 16. Hall plate; 17. housing. DETAILED DESCRIPTION

[0046] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0047] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0048] The present invention provides the following embodiments

[0049] Example 1

[0050] The embodiment of the present invention provides a motor for lifting the tailgate of an automobile. Figure 1-Figure 5 As shown, it includes an electronic brake assembly 14, a housing 17 and a spindle 1, the housing 17 is mounted on the electronic brake assembly 14, the spindle 1 is rotatably connected in the housing 17 through a rotor-stator structure, and one end of the spindle 1 is connected to the electronic brake assembly 14;

[0051] The main shaft 1 includes a sleeve 100, a telescopic shaft 101 and a telescopic shaft 102. The sleeve 100 is rotatably connected in the housing 17, the telescopic shaft 101 is slidably connected in the sleeve 100, and the telescopic shaft 102 is slidably connected in the telescopic shaft 101. The telescopic shaft 101 and the telescopic shaft 102 are respectively provided with a plurality of positioning holes 104 and a plurality of positioning holes 2 105. The telescopic shaft 101 is hinged with a buckle 103, and the sleeve 100 and the telescopic shaft 101 are connected by a positioning nail 106.

[0052] It also includes a heat dissipation system and a real-time fault monitoring system. The heat dissipation system is used to dissipate heat from the lifting motor, and the real-time fault monitoring system is used to monitor faults of the lifting motor. The heat dissipation system includes a heat dissipation prediction control module and a heat dissipation execution module. The heat dissipation prediction control module is used to predict the future temperature development trend of the lifting motor and control the heat dissipation execution module to perform heat dissipation operations.

[0053] Optionally, the lift motor has a stack height of 40mm, uses a 12-slot 8-pole winding, has a rated voltage of 24V and a rated power of 1200W.

[0054] The working principle and beneficial effects of the above technical solution are as follows: by installing the housing 17 on the electronic brake assembly 14, the main shaft 1 is connected to the electronic brake assembly 14, and the main shaft 1 is connected to the housing through the rotor-stator structure, and the hydraulic component is controlled by rotation to control the lifting of the tail board of the car, thereby ensuring the precise control of the lifting position and speed of the tail board of the car. When the electronic brake assembly 14 receives the control signal, it will release or lock the main shaft, thereby accurately controlling the position of the tail board in the air;

[0055] When adjusting the length of the main shaft 1, the telescopic shaft 1 101 can be slid along the shaft sleeve 100 or the telescopic shaft 2 102 can be slid along the telescopic shaft 1 101, and the shaft sleeve 100 and the telescopic shaft 1 101 can be positioned by the cooperation of the positioning pin 106 and the positioning hole 1 104, and the telescopic shaft 1 101 and the telescopic shaft 2 102 can be positioned by the cooperation of the pressing buckle 103 and the positioning hole 2 105;

[0056] The present invention improves the flexibility of adapting the automobile tailgate lifting motor and the hydraulic assembly through the retractable design of the main shaft 1.

[0057] Example 2

[0058] On the basis of Example 1, the rotor-stator structure includes an upper wire rack 6, which is installed in a housing 17, and an enameled wire 9 and a stator core 8 are installed on the upper wire rack 6. A wire passing plate 11 is installed in the housing 17, and one end of the enameled wire 9 is connected to the coil of the stator core 8, and the other end is connected to an external power supply through the wire passing plate 11, and a Hall plate 16 is installed on the upper wire rack 6;

[0059] A rotor core 10 is mounted on the main shaft 1 , and a magnetic steel 7 is mounted on the rotor core 10 .

[0060] The working principle and beneficial effects of the above technical solution are as follows: when working, the external power supply sequentially transmits current to the coil of the stator core 8 through the wire plate 11 and the enameled wire 9, and generates a rotating magnetic field under the excitation of the current. The rotor core 10 rotates under the action of the magnetic field force, thereby driving the main shaft 1 to rotate. In this process, the magnetic steel 7 is a magnet made of permanent magnetic material, which generates a magnetic field through current excitation, and generates torque by acting with the stator core 8, driving the rotor core 10 to rotate. The Hall plate 16 detects the position and speed of the rotor core 10 in real time, judges the position and speed of the rotor core 10 by inducing changes in the magnetic field, and feeds these signals back to the motor control system.

[0061] Example 3

[0062] On the basis of Example 1, a front cover 3 is installed on the housing 17, an oil seal 2 and a deep groove ball bearing 4 are provided between the front cover 3 and the main shaft 1, and a sealing ring 5 is provided between the front cover 3 and the housing 17;

[0063] A sealing ring 12 is provided between the electronic brake assembly 14 and the housing 17 . One end of the main shaft 1 close to the electronic brake assembly 14 is connected to the housing 17 via a deep groove ball bearing 13 . A waterproof joint 15 is provided on the housing 17 .

[0064] The working principle and beneficial effects of the above technical solution are as follows: through the arrangement of the front cover 3, the oil seal 2 and the deep groove ball bearing 4, stable support and sealing protection of the main shaft 1 are achieved; the arrangement of the sealing ring 15, the sealing ring 2 12 and the waterproof joint 15 can prevent foreign substances such as water and dust from entering the interior of the motor, thereby improving the service life of the motor; the oil seal 2 and the deep groove ball bearing 4 between the front cover 3 and the housing 17 improve the support and rotation stability of the main shaft 1.

[0065] Example 4

[0066] Based on the first embodiment, the heat dissipation execution module includes:

[0067] A radiator and a heat exchanger, wherein the radiator is mounted outside the housing 17, and the heat exchanger is mounted inside the housing 17 and contacts the inside of the radiator;

[0068] The coolant pipeline has two open ends respectively installed at the inlet and outlet of the pump body, and the pump body is installed in the casing 17. The coolant pipeline, the pump body and the heat exchange tube of the heat exchanger form a heat dissipation loop. The heat dissipation loop is provided with coolant, and the heat dissipation loop flows through the stator core 8 of the stator structure and then flows into the heat exchanger.

[0069] The working principle and beneficial effects of the above technical solution are as follows: if the predicted temperature value inside the motor is greater than the heat dissipation trigger temperature value, the heat dissipation prediction control module controls the heat dissipation execution module to start. Specifically, the pump body starts to drive the coolant to flow. When the coolant flows through the stator core 8, the heat on the stator core 8 is taken away to the heat exchanger. The heat exchanger and the radiator exchange heat. Finally, the heat is exchanged with the air in the external environment through the radiator, thereby reducing the internal temperature of the casing 17, realizing efficient heat dissipation management of the lifting motor, and having the effect of improving system efficiency and extending equipment life.

[0070] Example 5

[0071] Based on the first embodiment, the heat dissipation prediction control module includes:

[0072] A temperature acquisition unit, the temperature acquisition unit includes a plurality of temperature sensors installed on the inner wall of the housing 17, and the plurality of temperature sensors are evenly arranged along the axial direction of the main shaft 1;

[0073] A matrix construction unit, used for constructing a temperature rise prediction matrix of the lifting motor based on the collection result of the temperature collection unit;

[0074] The control unit is used to compare the predicted temperature value inside the motor in the next acquisition cycle obtained based on the lifting motor temperature rise prediction matrix with the heat dissipation trigger temperature value. If the predicted temperature value inside the motor is greater than the heat dissipation trigger temperature value, the heat dissipation execution module is started, otherwise it is not started.

[0075] The working principle and beneficial effects of the above technical solution are as follows: by setting up a heat dissipation prediction control module to monitor the inner wall temperature of the casing 17 in real time, and constructing a lifting motor temperature rise prediction matrix based on the collection results of the temperature collection unit, the predicted temperature value inside the motor in the next collection cycle is predicted, thereby starting the heat dissipation execution module in advance, effectively predicting the temperature change trend, reducing the occurrence of sudden accidents caused by sudden temperature changes, and effectively extending the life of the motor.

[0076] Example 6

[0077] Based on Example 5, the matrix construction unit includes:

[0078] The sorting subunit arranges all the temperature values ​​collected by each temperature sensor in time sequence to form a sequence 1;

[0079] The difference acquisition unit calculates the difference between the arranged temperature values ​​and the corresponding temperature values ​​on the left and right sides thereof, respectively, to obtain the left difference value and the right difference value corresponding to each temperature value, sets the left difference value of the first temperature value to a value equal to its right difference value, sets the right difference value of the last temperature value to a value equal to its left difference value, arranges the left difference value of each temperature sensor temperature value in the order of the corresponding temperature values ​​to form a second sequence, and arranges the right difference value of each temperature sensor temperature value in the order of the corresponding temperature values ​​to form a third sequence;

[0080] The matrix construction subunit constructs the matrix by taking sequence 1, sequence 2 and sequence 3 as the first row, second row and third row of the lifting motor temperature rise prediction matrix respectively:

[0081] ;in, is the temperature rise prediction matrix of the lifting motor in the area corresponding to the i-th temperature sensor, is the first temperature value of the sequence 1 corresponding to the i-th temperature sensor, is the second temperature value of the sequence 1 corresponding to the i-th temperature sensor, is the nth temperature value of the sequence 1 corresponding to the i-th temperature sensor, is the first temperature value of the second series corresponding to the i-th temperature sensor, is the second temperature value of sequence 2 corresponding to the i-th temperature sensor, is the nth temperature value of the sequence 2 corresponding to the i-th temperature sensor, is the first temperature value of the sequence 3 corresponding to the i-th temperature sensor, is the second temperature value of sequence 3 corresponding to the i-th temperature sensor, is the nth temperature value of sequence 3 corresponding to the i-th temperature sensor;

[0082] The prediction subunit obtains the detection value of each temperature sensor in the next acquisition cycle based on the lifting motor temperature rise prediction matrix of the corresponding area of ​​each temperature sensor, and calculates the average of the detection values ​​of each temperature sensor in the next acquisition cycle as the predicted temperature value inside the motor in the next acquisition cycle.

[0083] The working principle and beneficial effects of the above technical solution are as follows: all temperature values ​​collected by each temperature sensor are arranged in time series to form series one, the left difference of the temperature value of each temperature sensor is arranged in order of the corresponding temperature value to form series two, and the right difference of the temperature value of each temperature sensor is arranged in order of the corresponding temperature value to form series three. Series one, series two and series three can more accurately reflect the temperature change trend by sorting the temperature values ​​and calculating the difference, thereby ensuring the reliability of the lifting motor temperature rise prediction matrix of the corresponding area of ​​each temperature sensor. At the same time, the lifting motor temperature rise prediction matrix does not use a single temperature sensor to obtain the predicted temperature value inside the motor in the next acquisition cycle, but uses the lifting motor temperature rise prediction matrix of the corresponding areas of several temperature sensors to obtain the detection value of each temperature sensor in the next acquisition cycle, and obtains the average of the detection value of each temperature sensor in the next acquisition cycle as the predicted temperature value inside the motor in the next acquisition cycle, thereby increasing the accuracy of the numerical value of the predicted temperature value inside the motor in the next acquisition cycle. By accurately predicting the temperature change of the motor, it is possible to effectively prevent failures caused by overheating, improve the reliability and safety of the equipment, and reduce maintenance and replacement costs.

[0084] Example 7

[0085] On the basis of Example 6, obtaining the detection value of each temperature sensor in the next acquisition cycle based on the lift motor temperature rise prediction matrix of the area corresponding to each temperature sensor includes:

[0086] Obtain the mean of all matrix elements in the third row of the lifting motor temperature rise prediction matrix for the area corresponding to each temperature sensor, and set the value of the last column of the lifting motor temperature rise prediction matrix for the area corresponding to each temperature sensor to a value equal to the mean of all matrix elements in the third row, thereby obtaining a new matrix, and using the rank of the new matrix as the detection value of the next acquisition cycle of each temperature sensor.

[0087] The working principle and beneficial effects of the above technical solution are as follows: by calculating the mean of all matrix elements in the third row, the trend of temperature change can be captured more comprehensively, reducing the impact of a single data point on the prediction result, thereby improving the accuracy of the detection value; using the mean as the value of the last column of the new matrix helps to filter out the impact of extreme values ​​or noise, making temperature monitoring more stable and reliable, and avoiding misjudgments due to instantaneous fluctuations; using the rank of the new matrix as the detection value of the next acquisition cycle provides more multi-dimensional information for subsequent data analysis decisions, which helps to further optimize the design and operation strategies of the motor.

[0088] Example 8

[0089] Based on Example 1, the real-time fault monitoring system includes:

[0090] An operation data acquisition module, which is used to collect the operation data of the deep groove ball bearing 4, the main shaft 1, the enameled wire 9, the stator core 8, the magnetic steel 7 and the Hall plate 16 in each monitoring cycle, and calculate the actual operation status evaluation values ​​of the deep groove ball bearing 4, the main shaft 1, the enameled wire 9, the stator core 8, the magnetic steel 7 and the Hall plate 16 in each monitoring cycle based on the operation data;

[0091] A fault monitoring matrix building module is used to build a lift motor fault monitoring matrix based on the actual operating status evaluation values ​​of the deep groove ball bearing 4, the main shaft 1, the enameled wire 9, the stator core 8, the magnetic steel 7 and the Hall plate 16 in each monitoring cycle;

[0092] Early warning module, when the value of a column element of the lifting motor fault monitoring matrix is ​​negative, an alarm level is recorded. The alarm levels are divided into level 1 alarm, level 2 alarm, level 3 alarm, level 4 alarm, level 5 alarm and level 6 alarm. When the value of a column element of the lifting motor fault monitoring matrix does not contain negative numbers, the lifting motor is operating normally.

[0093] Lifting motor fault monitoring matrix:

[0094] ;in, It is the lifting motor fault monitoring matrix. is the actual operating status evaluation value of deep groove ball bearing 4 in the first monitoring cycle, It is the preset operating status evaluation value of deep groove ball bearing 4 in the first monitoring cycle. is the actual operating status evaluation value of the deep groove ball bearing in the jth monitoring cycle, is the preset operating status evaluation value of the deep groove ball bearing in the jth monitoring cycle, is the actual operating status evaluation value of the deep groove ball bearing in the mth monitoring cycle, is the preset operating status evaluation value of the deep groove ball bearing in the mth monitoring cycle, is the actual operating status evaluation value of spindle 1 in the first monitoring cycle, It is the preset operating status evaluation value of the first monitoring cycle of spindle 1. is the actual operating status evaluation value of spindle 1 in the jth monitoring cycle, is the preset operating status evaluation value of spindle 1 in the jth monitoring cycle, is the actual operating status evaluation value of spindle 1 in the mth monitoring cycle, is the preset operating status evaluation value of spindle 1 in the mth monitoring cycle, is the actual operating status evaluation value of the enameled wire 9 in the first monitoring cycle, is the preset operating status evaluation value of the enameled wire 9 in the first monitoring cycle, is the actual operating status evaluation value of the enameled wire 9 in the jth monitoring cycle, is the preset operating status evaluation value of the enameled wire 9 in the jth monitoring cycle, is the actual operating status evaluation value of the enameled wire 9 in the mth monitoring cycle, is the preset operating status evaluation value of the enameled wire 9 in the mth monitoring cycle, is the actual operating status evaluation value of the stator core 8 in the first monitoring cycle, is the preset operating status evaluation value of the stator core 8 in the first monitoring cycle, is the actual operating status evaluation value of the stator core 8 in the jth monitoring cycle, is the preset operating status evaluation value of the stator core 8 in the jth monitoring cycle, is the actual operating status evaluation value of the stator core 8 in the mth monitoring cycle, is the preset operating status evaluation value of the stator core 8 in the mth monitoring cycle, is the actual operating status evaluation value of magnetic steel 7 in the first monitoring cycle, is the preset operating status evaluation value of the magnetic steel 7 in the first monitoring cycle, is the actual operating status evaluation value of the magnetic steel 7 in the jth monitoring cycle, is the preset operating status evaluation value of the magnetic steel 7 in the jth monitoring cycle, is the actual operating status evaluation value of the magnetic steel 7 in the mth monitoring cycle, is the preset operating status evaluation value of the magnetic steel 7 in the mth monitoring cycle, is the actual operating status evaluation value of the Hall plate 16 in the first monitoring cycle, is the preset operating status evaluation value of the Hall plate 16 in the first monitoring cycle, is the actual operating status evaluation value of the Hall plate 16 in the jth monitoring cycle, is the preset operating status evaluation value of the Hall plate 16 in the jth monitoring cycle, is the actual operating status evaluation value of the Hall plate 16 in the mth monitoring cycle, It is the preset operating status evaluation value of the Hall plate 16 in the mth monitoring cycle.

[0095] The working principle and beneficial effects of the above technical solution are as follows: the data collected for the actual operating status evaluation value of the deep groove ball bearing 4 in each monitoring cycle include the temperature value, vibration frequency and noise intensity of the deep groove ball bearing 4 in the corresponding monitoring cycle; the data collected for the actual operating status evaluation value of the main shaft 1 in each monitoring cycle include the spindle electrocorrosion and the stability of the shaft speed; the data collected for the actual operating status evaluation value of the enameled wire 9 in each monitoring cycle include the current and voltage abnormalities of the enameled wire 9; the data collected for the actual operating status evaluation value of the stator core 8 in each monitoring cycle include the temperature of the stator core 8 and the current stability in the stator core 8; the data collected for the actual operating status evaluation value of the magnetic steel 7 in each monitoring cycle include the demagnetization of the magnetic steel; the data collected for the actual operating status evaluation value of the Hall plate 16 in each monitoring cycle include the stability of the Hall plate output signal; the actual operating status evaluation value of the above components in each monitoring cycle is equal to the absolute value of the difference between the time detection value corresponding to each physical quantity and the theoretical detection value, divided by the product of the theoretical detection value;

[0096] When the value of a column element of the lifting motor fault monitoring matrix is ​​negative, it proves that the element corresponding to the column element (deep groove ball bearing 14, main shaft 1, enameled wire 9, stator core 8, magnetic steel 7 or Hall plate 16) has a fault during the monitoring period corresponding to the element. The higher the alarm level, the more serious the fault of the lifting motor.

[0097] The real-time fault monitoring system can realize real-time monitoring of the operating status of the lifting motor and issue an early warning when the lifting motor is in poor operating condition, thereby avoiding accidents when the car tailgate is actually in use.

[0098] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A car tailgate lifting motor, characterized in that: The electronic brake assembly (14) comprises a housing (17) and a main shaft (1), wherein the housing (17) is mounted on the electronic brake assembly (14), the main shaft (1) is rotatably connected in the housing (17) via a rotor-stator structure, and one end of the main shaft (1) is connected to the electronic brake assembly (14); The main shaft (1) comprises a shaft sleeve (100), a telescopic shaft one (101) and a telescopic shaft two (102); the shaft sleeve (100) is rotatably connected in the housing (17); the telescopic shaft one (101) is slidably connected in the shaft sleeve (100); the telescopic shaft two (102) is slidably connected in the telescopic shaft one (101); the telescopic shaft one (101) and the telescopic shaft two (102) are respectively provided with a plurality of positioning holes one (104) and a plurality of positioning holes two (105); the telescopic shaft one (101) is hingedly connected with a buckle (103); the shaft sleeve (100) and the telescopic shaft one (101) are connected via a positioning pin (106); It also includes a heat dissipation system and a real-time fault monitoring system. The heat dissipation system is used to dissipate heat from the lifting motor. The real-time fault monitoring system is used to monitor the faults of the lifting motor. The heat dissipation system includes a heat dissipation prediction control module and a heat dissipation execution module. The heat dissipation prediction control module is used to predict the future temperature development trend of the lifting motor and control the heat dissipation execution module to perform heat dissipation operations. The thermal prediction control module includes: A temperature collection unit, the temperature collection unit comprising a plurality of temperature sensors mounted on the inner wall of the housing (17), the plurality of temperature sensors being evenly arranged along the axial direction of the main shaft (1); A matrix construction unit, used for constructing a temperature rise prediction matrix of the lifting motor based on the collection result of the temperature collection unit; A control unit is used to compare the predicted temperature value inside the motor in the next acquisition cycle obtained based on the lifting motor temperature rise prediction matrix with the heat dissipation trigger temperature value. If the predicted temperature value inside the motor is greater than the heat dissipation trigger temperature value, the heat dissipation execution module is started, otherwise it is not started; The matrix building blocks include: The sorting subunit arranges all the temperature values ​​collected by each temperature sensor in time sequence to form a sequence 1; The difference acquisition unit calculates the difference between the arranged temperature values ​​and the corresponding temperature values ​​on the left and right sides thereof, respectively, to obtain the left difference value and the right difference value corresponding to each temperature value, sets the left difference value of the first temperature value to a value equal to its right difference value, sets the right difference value of the last temperature value to a value equal to its left difference value, arranges the left difference value of each temperature sensor temperature value in the order of the corresponding temperature values ​​to form a second sequence, and arranges the right difference value of each temperature sensor temperature value in the order of the corresponding temperature values ​​to form a third sequence; The matrix construction subunit constructs the matrix by taking sequence 1, sequence 2 and sequence 3 as the first row, second row and third row of the lifting motor temperature rise prediction matrix respectively: ;in, is the temperature rise prediction matrix of the lifting motor in the area corresponding to the i-th temperature sensor, is the first temperature value of the sequence 1 corresponding to the i-th temperature sensor, is the second temperature value of the sequence 1 corresponding to the i-th temperature sensor, is the nth temperature value of the sequence 1 corresponding to the i-th temperature sensor, is the first temperature value of the second series corresponding to the i-th temperature sensor, is the second temperature value of sequence 2 corresponding to the i-th temperature sensor, is the nth temperature value of the sequence 2 corresponding to the i-th temperature sensor, is the first temperature value of the sequence 3 corresponding to the i-th temperature sensor, is the second temperature value of sequence 3 corresponding to the i-th temperature sensor, is the nth temperature value of sequence 3 corresponding to the i-th temperature sensor; The prediction subunit obtains the detection value of each temperature sensor in the next acquisition cycle based on the lifting motor temperature rise prediction matrix of the area corresponding to each temperature sensor, and calculates the average of the detection values ​​of each temperature sensor in the next acquisition cycle as the predicted temperature value inside the motor in the next acquisition cycle; The detection value of each temperature sensor in the next acquisition cycle is obtained based on the lift motor temperature rise prediction matrix corresponding to each temperature sensor, including: Obtain the mean of all matrix elements in the third row of the lifting motor temperature rise prediction matrix for the area corresponding to each temperature sensor, and set the value of the last column of the lifting motor temperature rise prediction matrix for the area corresponding to each temperature sensor to a value equal to the mean of all matrix elements in the third row, thereby obtaining a new matrix, and using the rank of the new matrix as the detection value of the next acquisition cycle of each temperature sensor.

2. The automobile tailgate lifting motor according to claim 1, characterized in that: The rotor-stator structure comprises an upper wire frame (6), the upper wire frame (6) being mounted in a casing (17), an enameled wire (9) and a stator core (8) being mounted on the upper wire frame (6), a wire passing plate (11) being mounted in the casing (17), one end of the enameled wire (9) being connected to a coil of the stator core (8), and the other end of the enameled wire (9) being connected to an external power supply via the wire passing plate (11), and a Hall plate (16) being mounted on the upper wire frame (6); A rotor core (10) is mounted on the main shaft (1), and a magnetic steel (7) is mounted on the rotor core (10).

3. The automobile tailgate lifting motor according to claim 1, characterized in that: A front cover (3) is installed on the casing (17); an oil seal (2) and a deep groove ball bearing (4) are provided between the front cover (3) and the main shaft (1); and a sealing ring (5) is provided between the front cover (3) and the casing (17); A sealing ring (12) is provided between the electronic brake assembly (14) and the housing (17); one end of the main shaft (1) close to the electronic brake assembly (14) is connected to the housing (17) via a deep groove ball bearing (13); and a waterproof joint (15) is provided on the housing (17).

4. The automobile tailgate lifting motor according to claim 1, characterized in that: The lifting motor has a stack height of 40mm, uses a 12-slot 8-pole winding, has a rated voltage of 24V and a rated power of 1200 watts.

5. The automobile tailgate lifting motor according to claim 1, characterized in that: The heat dissipation execution module includes: A radiator and a heat exchanger, the radiator being mounted outside the housing (17), and the heat exchanger being mounted inside the housing (17) and in contact with the inner side of the radiator; A coolant pipe, wherein two open ends of the coolant pipe are respectively mounted at the inlet and outlet of the pump body, the pump body is mounted in the casing (17), the coolant pipe, the pump body and the heat exchange tube of the heat exchanger form a heat dissipation loop, the heat dissipation loop is provided with coolant, and the coolant flows through the stator core (8) of the rotor-stator structure and then flows into the heat exchanger.

6. The automobile tailgate lifting motor according to claim 1, characterized in that: The real-time fault monitoring system includes: An operation data acquisition module, the operation data acquisition module is used to collect operation data of the deep groove ball bearing (4), the main shaft (1), the enameled wire (9), the stator core (8), the magnetic steel (7) and the Hall plate (16) in each monitoring cycle, and calculate actual operation status evaluation values ​​of the deep groove ball bearing (4), the main shaft (1), the enameled wire (9), the stator core (8), the magnetic steel (7) and the Hall plate (16) in each monitoring cycle based on the operation data; A fault monitoring matrix building module is used to build a lifting motor fault monitoring matrix based on actual operating state evaluation values ​​of the deep groove ball bearing (4), the main shaft (1), the enameled wire (9), the stator core (8), the magnetic steel (7) and the Hall plate (16) in each monitoring cycle; Early warning module, when the value of an element in a column of the lifting motor fault monitoring matrix is ​​negative, an alarm level is recorded. The alarm levels are divided into level 1 alarm, level 2 alarm, level 3 alarm, level 4 alarm, level 5 alarm and level 6 alarm. When the value of an element in a column of the lifting motor fault monitoring matrix is ​​not negative, the lifting motor is operating normally.

7. The automobile tailgate lifting motor according to claim 6, characterized in that: Lifting motor fault monitoring matrix: ;in, It is the lifting motor fault monitoring matrix. is the actual operating status evaluation value of deep groove ball bearing 4 in the first monitoring cycle, It is the preset operating status evaluation value of deep groove ball bearing 4 in the first monitoring cycle. is the actual operating status evaluation value of the deep groove ball bearing in the jth monitoring cycle, is the preset operating status evaluation value of deep groove ball bearing 4 in the jth monitoring cycle, is the actual operating status evaluation value of the deep groove ball bearing in the mth monitoring cycle, is the preset operating status evaluation value of the deep groove ball bearing in the mth monitoring cycle, is the actual operating status evaluation value of spindle 1 in the first monitoring cycle, It is the preset operating status evaluation value of the first monitoring cycle of spindle 1. is the actual operating status evaluation value of spindle 1 in the jth monitoring cycle, is the preset operating status evaluation value of spindle 1 in the jth monitoring cycle, is the actual operating status evaluation value of spindle 1 in the mth monitoring cycle, is the preset operating status evaluation value of spindle 1 in the mth monitoring cycle, is the actual operating status evaluation value of the enameled wire 9 in the first monitoring cycle, is the preset operating status evaluation value of the enameled wire 9 in the first monitoring cycle, is the actual operating status evaluation value of the enameled wire 9 in the jth monitoring cycle, is the preset operating status evaluation value of the enameled wire 9 in the jth monitoring cycle, is the actual operating status evaluation value of the enameled wire 9 in the mth monitoring cycle, is the preset operating status evaluation value of the enameled wire 9 in the mth monitoring cycle, is the actual operating status evaluation value of the stator core 8 in the first monitoring cycle, is the preset operating status evaluation value of the stator core 8 in the first monitoring cycle, is the actual operating status evaluation value of the stator core 8 in the jth monitoring cycle, is the preset operating status evaluation value of the stator core 8 in the jth monitoring cycle, is the actual operating status evaluation value of the stator core 8 in the mth monitoring cycle, is the preset operating status evaluation value of the stator core 8 in the mth monitoring cycle, is the actual operating status evaluation value of magnetic steel 7 in the first monitoring cycle, is the preset operating status evaluation value of the magnetic steel 7 in the first monitoring cycle, is the actual operating status evaluation value of the magnetic steel 7 in the jth monitoring cycle, is the preset operating status evaluation value of the magnetic steel 7 in the jth monitoring cycle, is the actual operating status evaluation value of the magnetic steel 7 in the mth monitoring cycle, is the preset operating status evaluation value of the magnetic steel 7 in the mth monitoring cycle, is the actual operating status evaluation value of the Hall plate 16 in the first monitoring cycle, is the preset operating status evaluation value of the Hall plate 16 in the first monitoring cycle, is the actual operating status evaluation value of the Hall plate 16 in the jth monitoring cycle, is the preset operating status evaluation value of the Hall plate 16 in the jth monitoring cycle, is the actual operating status evaluation value of the Hall plate 16 in the mth monitoring cycle, It is the preset operating status evaluation value of the Hall plate 16 in the mth monitoring cycle.

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