System and method for driving double-seat slide rail motor to move synchronously based on communication bus

Abstract

The invention discloses a system and method for driving double-seat slide rail motors to move synchronously based on a communication bus, the system comprises two slide rail motors and two groups of seat slide rails, the slide rail motors drive the seat slide rails, a control module is arranged in each slide rail motor, and the control module and the slide rail motors are directly connected through pins. Comprising the following steps: establishing communication connection between control modules of two slide rail motors, collecting state information of the slide rail motors, and transmitting the state information to a communication bus for information interaction; deriving the target rotating speed of the slide rail motor, and enabling the real-time rotating speed of the slide rail motor to converge at the target rotating speed through the calculation of the control module; position information in the state information of the sliding rail motors is obtained in real time, and the position difference value between the position information of the two sliding rail motors is compared to control the rotating speed; the maximum output power is calculated through the parameters of the sliding rail motor, the critical value is set, when the current output power is larger than the critical value, the sliding rail motor is driven in a speed reduction mode or stops driving, and the control method has the advantage of being high in control precision.

Description

Technical Field

[0001] The present application relates to the technical field of automobile accessories, and in particular to a system and method for driving a synchronous motion of a dual seat slide rail motor based on a communication bus. Background Art

[0002] Car seats refer to seats used for riding in cars, which are usually divided into manual seats and electric seats. The bottom of the electric seat is generally provided with two seat slides for support, and the seat slides are driven by a slide motor to realize the movement and adjustment of the seat.

[0003] However, the existing driving method of electric seats has the following defects: electric seats usually have a slide rail motor on each of the two seat slide rails, an external controller is used to connect the two slide rail motors, and then the controller is connected to the vehicle line. The controller needs to find a position under the seat and use brackets and other structures for installation and layout, which takes up a lot of space. The wiring harness layout between the slide rail motor and the controller must also be considered to reduce structural interference when driving the seat slide rails, which makes the layout difficult. Summary of the invention

[0004] One object of the present application is to provide a communication bus-based dual seat slide rail motor synchronous motion system and method with flexible installation, high control accuracy and simple wiring design.

[0005] To achieve the above objectives, the technical solution adopted in the present application is: a synchronous motion system for dual seat slide motors driven by a communication bus, comprising two slide motors and two sets of seat slides, the slide motors and the seat slides are arranged in a one-to-one manner, the slide motors are suitable for driving the seat slides, a control chamber is provided on the slide motor, a control module is arranged in the control chamber, the control module and the slide motor are directly connected through pins, and the synchronous motion method comprises the following steps: S100, establishing a communication connection between control modules of two slide rail motors by using a communication bus, the control modules collecting status information of corresponding slide rail motors, and transmitting the status information to the communication bus for information exchange; S200, deriving a target speed of the slide rail motor according to the running speed of the seat slide rail, and making the real-time speed of the slide rail motor converge to the target speed through calculation by the control module; S300, acquiring position information in the state information of the slide rail motor in real time, comparing the position difference between the position information of the two slide rail motors, if the position difference exceeds the allowable value, the control module adjusts the real-time rotation speed of the slide rail motor, if the position difference is within the allowable value, the control module keeps the slide rail motor at a constant rotation speed; S400, calculating the maximum output power through the parameters of the slide rail motor, setting a value lower than the maximum output power as a critical value, and when the current output power of the slide rail motor is greater than the critical value, the slide rail motor is driven at a reduced speed or stops driving.

[0006] In some embodiments, the communication bus is a LIN bus, a master node is set on the communication bus, and the two control modules are used as slave nodes, or the communication bus is a LIN bus or an IIC bus or an SPI bus, one control module is used as the master node, and the other control module is used as the slave node; a body BCM module is set in the communication bus, and the body BCM module is suitable as the master node.

[0007] In some embodiments, a priority is set for data reporting and transmission to the communication bus; an event trigger mechanism is used to send data when the state of the slide motor changes; the master node sends synchronization instructions uniformly and coordinates the actions of each node through timestamp marking; a pre-compensation algorithm is added to the slave node to predict and compensate delays based on historical data; the master node periodically sends bus status detection frames to the slave node, and the slave node automatically resets and resynchronizes when it detects a bus abnormality.

[0008] In some embodiments, the control module includes a controller and a position sensor, the controller is suitable for obtaining the rotational speed, driving power and PMW information of the slide rail motor, and the position sensor is suitable for obtaining the position information of the slide rail motor; when the position difference between the position information of the two slide rail motors exceeds the allowable value, the PWM duty cycle of the slide rail motor is adjusted through the control module, so that the slide rail motor with an advanced position runs at a speed lower than the target speed, and the slide rail motor with a lagging position runs at a speed higher than the target speed; two-thirds of the maximum output power is set as the critical value, and when the current output power of the slide rail motor is greater than the critical value, the slide rail motor slows down or stops driving.

[0009] A communication bus-based dual-seat slide motor synchronous motion system comprises two slide motors and two sets of seat slides, wherein the slide motors and the seat slides are arranged in a one-to-one manner, and the slide motors are suitable for driving the seat slides by the synchronous motion method described in any one of claims 1 to 4, and a control chamber is provided on the slide motor, wherein a control module is arranged in the control chamber, and the control module and the slide motor are directly connected via pins.

[0010] In some embodiments, a bracket assembly is arranged between the slide rail motor and the seat slide rail, a connecting seat is arranged on the bracket assembly, a through hole is arranged on the connecting seat, a vibration isolation pad is arranged in the connecting seat, a first rotating clamping structure is arranged on the peripheral side of the connecting seat, a second rotating clamping structure is arranged on the peripheral side of the driving side of the slide rail motor, the driving shaft of the slide rail motor is suitable for passing through the through hole and making the driving side of the slide rail motor tightly fit to the vibration isolation pad, and the slide rail motor is suitable for rotating along the circumferential direction so that the first rotating clamping structure and the second rotating clamping structure are matched and locked.

[0011] In some embodiments, the first rotating clamping structure includes a slot portion and a barb portion, and the second rotating clamping structure includes a boss portion and a groove portion, the slot portion and the boss portion are suitable for matingly connecting and limiting the slide rail motor from being separated from the connecting seat, the barb portion and the groove portion are suitable for matingly connecting and limiting the slide rail motor from being separated from the connecting seat, and the boss portion is suitable for moving in the slot portion so that the barb portion is mated with the groove portion.

[0012] In some embodiments, the first rotating clamping structure includes a guide groove and a fixed groove, and the second rotating clamping structure includes a boss portion, the guide groove and the fixed groove are distributed at intervals along the circumference of the connecting seat, and a movable clamping portion is provided on the side of the guide groove close to the fixed groove, and the boss portion is suitable for entering the guide groove along the axial direction of the connecting seat, and when the boss portion is suitable for axial movement along the connecting seat, the movable clamping portion is suitable for elastic deformation along the radial direction of the connecting seat, so that the boss portion is suitable for entering the fixed groove from the guide groove, and the movable clamping portion and the boss portion are suitable for cooperating to limit and fix the boss portion; the guide groove has a tendency to shrink in width from the side away from the fixed groove to the side close to the fixed groove, and is connected with the movable clamping portion, and one end of the boss portion tends to shrink toward the other end; the guide groove, the fixed groove and the boss portion are all knife-shaped structures.

[0013] In some embodiments, the seat slide includes a first slide and a second slide, a transmission device is provided between the first slide and the second slide, the transmission device is suitable for making the first slide and the second slide slide relative to each other, the slide motor is suitable for being fixed on the first slide through the bracket assembly and being connected with the transmission device, the bracket assembly is provided with a gripper connection structure, the front end of the gripper connection structure is suitable for being snap-fitted on both sides of the first slide away from the second slide and the side adjacent to the first slide, and the slide motor is arranged close to the second slide; the first slide is provided with a first positioning portion along the length direction on the side away from the second slide, the gripper connection structure is provided with a second positioning portion, the first positioning portion and the second positioning portion are suitable for being fitted and connected; the first positioning portion and the second positioning portion are of multiple types and the same number; the front end of the gripper connection structure is provided with a locking port, the first slide is provided with a detachable locker, the locking port and the locker are suitable for locking with each other; the gripper connection structure is provided with a drive channel along the connection direction of the transmission device and the slide motor, and the drive shaft of the slide motor is suitable for being accommodated in the drive channel.

[0014] In some embodiments, the slide rail motor includes a shell, an end cover and a drive assembly, the drive assembly is suitable for being arranged in the shell, the end cover is suitable for closing the drive side of the shell, a positioning column is provided at the front end of the drive assembly, the positioning column is suitable for abutting against the end cover, and the control chamber is formed between the end cover and the drive assembly; the two slide rail motors have opposite rotation directions when driving the seat slide rails, an interface module is provided on the outer peripheral side of the slide rail motor, and the interface module is provided with a first pin, a second pin, a third pin and a fourth pin, the first pin is suitable for connecting the positive pole of the power supply, the second pin is suitable for connecting the negative pole of the power supply, and the third pin is suitable for connecting The pin is suitable for connecting to a communication bus, and the fourth pin is suitable for being vacant or short-circuited to ground to distinguish the rotation direction of the slide motor; the interface module passes through the shell outside the shell and is connected to the controller and the drive assembly; a positioning port is provided on the control module, and the positioning column is suitable for being engaged with the positioning port and limiting the movement of the control module; the control chamber is located near the drive side of the slide motor, the drive shaft of the slide motor passes through the control chamber, and the control module is coaxially and spacedly nested on the circumference of the drive shaft of the slide motor; the interface module of the slide motor is located on the side of the corresponding movable slide rail away from the other movable slide rail.

[0015] Compared with the prior art, the beneficial effects of this application are: 1. Compared with the traditional solution in which two slide rail motors share one controller, the method of driving the synchronous movement of dual-seat slide rail motors based on a communication bus in the present application can reduce the mutual interference between the power supply voltage and the drive motor current of the two slide rail motors at the controller by independently controlling each slide rail motor with a built-in control module. By optimizing the control logic, the two slide rail motors can be controlled and coordinated more accurately. At the same time, the built-in control module can effectively eliminate the risk of electromagnetic interference, has higher reliability, and can also simplify the wiring design.

[0016] 2. The dual-seat slide rail motor synchronous motion system driven by the communication bus of the present application can solve the problem of difficult layout of traditional controllers by independently controlling the built-in control module of the slide rail motor, thereby effectively reducing the space occupied by the drive components under the seat. At the same time, the built-in control module can use pins to achieve direct connection with the drive motor without wiring, making the installation process more convenient, reducing the difficulty and cost of installation, shortening the signal transmission distance, reducing the risk of electromagnetic interference, and simplifying the wiring design. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a connection diagram of setting a master node on a communication bus according to a preferred embodiment of the present application.

[0018] Figure 2 This is a connection diagram of the control modules of the left and right slide rail motors as master-slave nodes according to a preferred embodiment of the present application.

[0019] Figure 3 It is a flow chart of the dual-slide motor synchronous operation mechanism according to a preferred embodiment of the present application.

[0020] Figure 4 This is a connection diagram of a slide rail motor and a seat slide rail according to a preferred embodiment of the present application.

[0021] Figure 5 It is a top view of the connection between the slide rail motor and the seat slide rail according to a preferred embodiment of the present application.

[0022] Figure 6 According to a preferred embodiment of the present application Figure 5 Section view along AA direction.

[0023] Figure 7 It is an exploded structural view of a slide rail motor according to a preferred embodiment of the present application.

[0024] Figure 8 It is a structural view of an interface module according to a preferred embodiment of the present application.

[0025] Fig. 9It is a connection diagram of a bracket assembly and a slide rail motor according to a preferred embodiment of the present application.

[0026] Fig.10 This is another connection schematic diagram of a bracket assembly and a slide rail motor according to a preferred embodiment of the present application.

[0027] Fig.11 It is a schematic assembly diagram of a seat slide rail and a bracket assembly according to a preferred embodiment of the present application.

[0028] In the figure: 1. slide rail motor; 11. control chamber; 12. control module; 121. positioning port; 13. second rotating clamping structure; 131. boss portion; 132. groove portion; 14. shell; 15. end cover; 16. drive assembly; 161. drive shaft; 162. positioning column; 2. seat slide rail; 21. first slide rail; 211. first positioning portion; 212. locker; 22. second slide rail; 23. transmission device; 3. bracket assembly; 31. connecting seat; 311. first rotating clamping structure; 3111. clamping groove portion; 3112. barb portion; 3113. guide groove; 3114. fixing groove; 3115. movable clamping portion; 32. through hole; 33. vibration isolation pad; 34. gripper connection structure; 341. second positioning portion; 342. locking port; 343. drive channel; 4. interface module. DETAILED DESCRIPTION

[0029] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0030] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific scope of protection of the present application.

[0031] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0032] The terms "including" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0033] The present application is further described below with reference to the accompanying drawings: like Figures 1 to 11 As shown, the present application provides a dual seat slide motor synchronous motion system driven based on a communication bus, including two slide motors 1 and two groups of seat slides 2, the slide motors 1 and the seat slides 2 are arranged in a one-to-one manner, and one slide motor 1 is suitable for driving a group of corresponding seat slides 2. Specifically, the seat slide 2 includes a first slide 21 and a second slide 22, the first slide 21 and the second slide 22 are respectively connected to the vehicle body and provided with a seat, a transmission device 23 (including HDM gear box, transmission screw and other transmission components) is arranged between the first slide 21 and the second slide 22, the slide motor 1 is connected to the transmission device 23, and the slide motor 1 is suitable for driving the transmission device 23 to make the first slide 21 and the second slide 22 slide relative to each other, thereby driving the seat to move.

[0034] The slide rail motor 1 has a built-in control module 12, which is suitable for sending information of each slide rail motor 1 to the communication bus, including but not limited to the position information, rotation speed, driving power, PWM and other status information of the slide rail motor 1. Specifically, the control module 12 includes a controller and a position sensor. The controller is suitable for obtaining the rotation speed, driving power, PWM and other information of the slide rail motor 1, and the position sensor is suitable for obtaining the position information of the slide rail motor 1.

[0035] In some embodiments, the position sensor is a Hall sensor, which can be embedded inside the slide motor 1 and obtain the position information of the slide motor 1 in real time.

[0036] like Figures 1 to 3 As shown, the synchronous motion method of the slide rail motor 1 includes the following steps.

[0037] S100, a communication connection is established between the control modules 12 of the two slide rail motors 1 by using a communication bus, and the control module 12 collects status information of the corresponding slide rail motor 1 and transmits the status information to the communication bus for information exchange.

[0038] like Figure 1In the embodiment shown, the communication bus is a LIN bus. Since the LIN bus has master and slave nodes, a master node must exist when the bus is running. A master node can be set on the communication bus, and two control modules 12 are used as slave nodes. Each control module 12 transmits the collected status information of the slide motor 1 to the bus, and at the same time obtains the status information of another slide motor 1 through the LIN bus, and then realizes the synchronous operation of the left and right seat slides 2 through reasonable calculations.

[0039] like Figure 1 In the embodiment shown, a vehicle body BCM module is provided in the communication bus. The vehicle body BCM module serves as a master node and can utilize the BCM module generally provided on the vehicle body as a master node, so that the information interaction and control of the slide rail motor 1 can be more timely and unified.

[0040] It is worth noting that using the vehicle body BCM module as the master node is not the only option. Other controllers such as CBCU can also be selected as the master node.

[0041] like Figure 2 In the embodiment shown, the communication bus is a LIN bus or an IIC bus or an SPI bus, one control module 12 is used as a master node, and the other control module 12 is used as a slave node. The advantage of this design is that the synchronous motion control of the two slide rail motors 1 can be relatively independent from other control systems, is not easily disturbed, and runs more stably.

[0042] It can be understood that a master node is set on the communication bus, and two controllers are used as two slave nodes, and one of the two controllers is used as the master node and the other as the slave node. Both schemes are independent schemes, and either scheme can realize the synchronous operation function of the left and right slide rails.

[0043] In the present application, the one-to-one control scheme of the slide motor 1 and the control module 12 implemented through the communication bus may cause the following problems. For example, when the communication bus is a LIN bus, the maximum rate of the LIN bus is only 20kbps. When multiple nodes report data at the same time (such as the status of the left and right slide motors 1, position sensors, etc.), communication delays may be caused, that is, there is a certain conflict between the real-time interaction of the status information and the bus bandwidth.

[0044] In some embodiments, the total amount of data interacting simultaneously on the communication bus can be reduced by setting the priority of data reporting to the communication bus, for example, setting motor position information to a high priority and diagnostic information to a low priority.

[0045] In some embodiments, an event trigger mechanism may be used to send data when the state of the slide rail motor 1 changes, or to send data only when the state of the hub motor changes, so as to reduce the total amount of data interacting simultaneously on the communication bus.

[0046] For another example, the left and right slide rail motors 1 need to be adjusted synchronously to keep the seat balanced, but the independent controllers may cause asynchronous actions due to communication delays, resulting in the problem that the two nodes are difficult to coordinate control.

[0047] In some embodiments, the master node sends synchronization instructions uniformly and coordinates the actions of each node through timestamp marking.

[0048] In some embodiments, a pre-compensation algorithm is added to the slave node to predict the compensation delay based on historical data, so as to synchronize the actions of the two slide rail motors 1 as much as possible.

[0049] For example, communication anomalies such as bus short circuit and node failure may cause the communication bus to lock. To solve this problem, an automatic recovery mechanism needs to be designed. The master node periodically sends bus status detection frames to the slave node. When the slave node detects a bus anomaly, it automatically resets and resynchronizes.

[0050] S200 , deriving a target rotation speed of the slide rail motor 1 according to the running speed of the seat slide rail 2 , and making the real-time rotation speed of the slide rail motor 1 converge at the target rotation speed through calculation by the control module 12 .

[0051] To achieve speed synchronization between the two slide motors 1, the operating speed of the seat slide 2 and the target speed of the slide motor 1 are derived based on the seat operation specification requirements. For example, a certain specification requires the seat to run at a speed of 20 mm / s. The required motor speed can be inferred from the screw lead, gear ratio and other parameters of the HDM gearbox. For details, please refer to Table 1.

[0052] Table 1 Correspondence between motor speed and seat movement speed

[0053] S300, obtain the position information in the status information of the slide rail motor 1 in real time, compare the position difference between the position information of the two slide rail motors 1, if the position difference exceeds the allowable value, the control module 12 adjusts the real-time rotation speed of the slide rail motor 1, if the position difference is within the allowable value, the control module 12 keeps the slide rail motor 1 at a constant rotation speed.

[0054] In some embodiments, when the position difference between the position information of the two slide rail motors 1 exceeds the allowable value, the control module 12 adjusts the PWM duty cycle of the slide rail motor 1 so that the slide rail motor 1 with an advanced position runs at a speed lower than the target speed, and the slide rail motor 1 with a lagging position runs at a speed higher than the target speed. Specifically, the slide rail motor 1 with an advanced position can run near below the target speed, and the slide rail motor 1 with a lagging position can run near above the target speed, thereby achieving fine-tuning synchronization of the two slide rail motors 1.

[0055] S400, calculating the maximum output power through the parameters of the slide motor 1, setting a value lower than the maximum output power as a critical value, and when the current output power of the slide motor 1 is greater than the critical value, the slide motor 1 is driven at a reduced speed or stops driving.

[0056] In some embodiments, two-thirds of the maximum output power is set as the critical value. When the current output power of the slide motor 1 is greater than the critical value, the slide motor 1 is driven at a reduced speed or stops driving, thereby reducing the probability of overload damage caused by obstruction of the operation of the slide motor 1.

[0057] like Figures 4 to 11 As shown, the present application also provides a dual seat slide motor synchronous motion system driven based on a communication bus, including two slide motors 1 and two groups of seat slides 2, the slide motors 1 and the seat slides 2 are arranged one by one, and one slide motor 1 is suitable for driving a group of corresponding seat slides 2. Specifically, the seat slide 2 includes a first slide 21 and a second slide 22, the first slide 21 and the second slide 22 are respectively connected to the vehicle body and provided with a seat, a transmission device 23 (including HDM gear box, transmission shaft and other transmission components) is arranged between the first slide 21 and the second slide 22, the slide motor 1 is connected to the transmission device 23, and the slide motor 1 is suitable for driving the transmission device 23 to make the first slide 21 and the second slide 22 slide relative to each other, thereby driving the seat to move.

[0058] It can be understood that when the number of the slide rail motor 1 and the seat slide rail 2 are both two, it is possible to not occupy the space under the seat and to stably support the seat for sliding adjustment. When the number of the slide rail motor 1 and the seat slide rail 2 exceeds two, the slide rail motor 1 synchronous motion system and method of the present application can also be used for arrangement and control.

[0059] A control chamber 11 is provided near the driving side of the slide rail motor 1, and a driving shaft 161 of the slide rail motor 1 passes through the control chamber 11. A control module 12 is built into the slide rail motor 1, and the control module 12 is suitable for being accommodated in the control chamber 11, and is coaxially and spacedly nested on the circumference of the driving shaft 161. The control module 12 is installed inside the slide rail motor 1 by avoiding the driving shaft 161, which ensures stability while reducing the overall compactness of the slide rail motor 1, thereby freeing up space under the seat. The requirement for synchronous control of the state of the slide rail motor 1 due to the built-in control module 12 can be achieved through the synchronous motion method of the slide rail motor 1 in the above-mentioned embodiment.

[0060] In the traditional way that two slide rail motors 1 share one controller, their power supply voltage and driving motor current are prone to mutual interference. However, the present application uses a built-in control module 12 design to place the controller close to the motor, shorten the signal transmission distance, reduce the risk of electromagnetic interference, simplify the wiring design, and make the collected motor data more accurate and reliable, thereby improving the control accuracy and reliability of the controller.

[0061] In some embodiments, the control module 12 and the driving part of the slide motor 1 are directly connected through pins, and the connection between the motor and the circuit board can be achieved by using the pins of some components themselves, which simplifies wiring and makes the installation process more convenient, reducing the difficulty and cost of installation.

[0062] like Figures 4 to 6 In the embodiments shown in 9 to 11, a bracket assembly 3 is arranged between the slide motor 1 and the seat slide 2, a connecting seat 31 is arranged on the bracket assembly 3, a through hole 32 is arranged on the connecting seat 31, a vibration isolation pad 33 is arranged in the connecting seat 31, a first rotating clamping structure 311 is arranged on the circumferential side of the connecting seat 31, a second rotating clamping structure 13 is arranged on the circumferential side of the driving side of the slide motor 1, the driving shaft 161 is suitable for passing through the through hole 32 and making the driving side of the slide motor 1 tightly fit to the vibration isolation pad 33, and the slide motor 1 is suitable for rotating along the circumferential direction, so that the first rotating clamping structure 311 and the second rotating clamping structure 13 are matched and locked.

[0063] In some embodiments, the vibration isolation pad 33 is made of a flexible or elastic material, such as rubber. When the first rotating clamping structure 311 and the second rotating clamping structure 13 are locked together, an interference fit can be maintained between the driving side of the slide motor 1 and the vibration isolation pad 33. The micro-deformation and flexibility of the vibration isolation pad are used to buffer the connection between the slide motor 1 and the connecting seat 31, thereby reducing the noise generated by vibration.

[0064] The circumferential rotation locking method of the first rotating clamping structure 311 and the second rotating clamping structure 13 can lock the slide rail motor 1 and the connecting seat 31 while the square head of the drive shaft 161 is aligned with the square hole of the HDM gear box. This can effectively reduce the difficulty of assembly and solve the problem of angular alignment between the square head of the drive shaft 161 and the square hole of the HDM gear shaft during the combination of the slide rail motor 1 and the connecting seat 31.

[0065] like Figures 4 to 6 In the embodiment shown in 9, the first rotating clamping structure 311 includes a slot portion 3111 and a barb portion 3112, and the second rotating clamping structure 13 includes a boss portion 131 and a groove portion 132. The slot portion 3111 and the boss portion 131 are suitable for matching and connecting to limit the slide motor 1 from being separated from the connecting seat 31, the barb portion 3112 and the groove portion 132 are suitable for matching and connecting to limit the slide motor 1 from being separated from the connecting seat 31, and the boss portion 131 is suitable for moving in the slot portion 3111 so that the barb portion 3112 matches with the groove portion 132.

[0066] like Fig. 9 In the illustrated embodiment, the slot portion 3111 is opened along the circumference of the connecting shaft and the openings are all facing the clockwise direction (counterclockwise direction). The slide rail motor 1 can rotate in the counterclockwise direction (clockwise direction) so that the boss portion 131 enters from the opening of the slot portion 3111 and moves deeper along the slot portion 3111, so that an axial clamping limit occurs between the connecting seat 31 and the slide rail motor 1. During this process, the barb portion 3112 can utilize its own deformation to fit onto the outer surface of the slide rail motor 1. As the slide rail motor 1 rotates relative to the connecting seat 31, the barb portion 3112 can slide into the groove portion 132, so that an axial and circumferential clamping limit occurs between the connecting seat 31 and the slide rail motor 1, thereby locking the connecting seat 31 and the slide rail motor 1.

[0067] In some embodiments, the number of the slot portions 3111 and the boss portions 131 are the same and both are multiple, the slot portions 3111 are arranged at intervals along the circumference of the connecting seat 31, and the boss portions 131 are arranged at intervals along the circumference of the slide rail motor 1, the slot portions 3111 and the boss portions 131 are suitable for one-to-one matching connection, which can improve the stability of the initial combination of the connecting seat 31 and the slide rail motor 1, reduce the reaction force at the vibration isolation pad 33 along the axial direction of the slide rail motor 1, and reduce the difficulty of matching and locking the hook portion 3112 and the groove portion 132.

[0068] like Fig.10In the illustrated embodiment, the first rotating clamping structure 311 includes a guide groove 3113 and a fixed groove 3114, and the second rotating clamping structure 13 includes a boss portion 131. The guide groove 3113 and the fixed groove 3114 are distributed at intervals along the circumference of the connecting seat 31, and a movable clamping portion 3115 is provided on the side of the guide groove 3113 close to the fixed groove 3114. The boss portion 131 is suitable for entering the guide groove 3113 along the axial direction of the connecting seat 31. When the boss portion 131 is suitable for axial movement along the connecting seat 31, the movable clamping portion 3115 is suitable for elastic deformation along the radial direction of the connecting seat 31, so that the boss portion 131 is suitable for entering the fixed groove 3114 from the guide groove 3113, and the movable clamping portion 3115 and the boss portion 131 are suitable for cooperating to limit the fixed boss portion 131.

[0069] It can be understood that the movable clamping portion 3115 plays a one-way locking role. When the boss portion 131 moves from the guide groove 3113 to the fixed groove 3114, the movable clamping portion 3115 is difficult to limit the movement of the boss portion 131 under the guidance of the contact surface direction with the boss portion 131. After the boss portion 131 enters the fixed groove 3114, the contact surface direction of the boss portion 131 and the movable clamping portion 3115 changes, and it is difficult for the boss portion 131 to elastically deform along the radial direction of the connecting seat 31 under the pressure of the movable clamping portion 3115. Therefore, the boss portion 131 is successfully restricted in the fixed groove 3114 and is difficult to disengage.

[0070] like Fig.10 In the illustrated embodiment, the side of the guide groove 3113 close to the installation of the slide motor 1 is the entrance. When the slide motor 1 is axially docked with the connecting seat 31, the boss portion 131 can enter the guide groove 3113 from this side. The side of the fixed groove 3114 close to the guide groove 3113 is the entrance. The boss portion 131 is suitable for pushing open the movable clamping portion 3115 to enter the fixed groove 3114. The fixed groove 3114 limits the movement of the boss portion 131 in the docking direction (axial direction) between the slide motor 1 and the connecting seat 31 and on the opposite side of the entrance. The movable clamping portion 3115 limits the movement of the boss portion 131 on the entrance side of the fixed groove 3114.

[0071] like Fig.10 In the shown embodiment, the width of the guide groove 3113 tends to shrink from the side away from the fixed groove 3114 to the side close to the fixed groove 3114, and is connected with the movable clamping portion 3115. One end of the boss portion 131 tends to shrink toward the other end. When the boss portion 131 moves circumferentially along the connecting seat 31 in the guide groove 3113, as the guide groove 3113 shrinks, the boss portion 131 is suitable for interfering with the movable clamping portion 3115 in the radial direction of the connecting seat 31 and the slide motor 1, and is suitable for more smoothly compressing the movable clamping portion 3115 to deform along the radial direction of the connecting seat 31 and the slide motor 1, which can effectively reduce the difficulty of the boss portion 131 passing through the movable clamping portion 3115.

[0072] like Fig.10 In the illustrated embodiment, the guide groove 3113, the fixed groove 3114 and the boss portion 131 are all knife-shaped structures, one side of the knife-shaped structure is suitable as a guide to facilitate the boss portion 131 to enter the fixed groove 3114 from the guide groove 3113, and the other side of the knife-shaped structure is used as a positioning to limit the boss portion 131 from the fixed groove 3114 back to the guide groove 3113.

[0073] like Fig.10 In the illustrated embodiment, the number of guide grooves 3113, fixing grooves 3114 and boss portions 131 are the same and are all multiple. A structural combination formed by the interval arrangement of a guide groove 3113 and a fixing groove 3114 is arranged at intervals along the circumference of the connecting seat 31, and the boss portions 131 are arranged at intervals along the circumference of the slide motor 1. The guide grooves 3113, fixing grooves 3114 and boss portions 131 are suitable for one-to-one matching connection.

[0074] like Figures 4 to 6 In the embodiment shown in 11, the slide rail motor 1 is suitable for being fixed on the first slide rail 21 through the bracket assembly 3 and being connected with the transmission device 23. A grip connection structure 34 is provided on the bracket assembly 3. The front end of the grip connection structure 34 is suitable for being snap-fitted and connected on both sides of the side of the first slide rail 21 away from the second slide rail 22 and the side adjacent to it, so that the slide rail motor 1 is arranged close to the second slide rail 22.

[0075] The contoured connection between the gripper connection structure 34 and the first guide rail can improve the connection stability between the bracket assembly 3 and the first slide rail 21, increase the contact area between the gripper connection structure 34 and the first guide rail, make it easier to disperse the force, and reduce the shaking and abnormal noise between the bracket assembly 3 and the first slide rail 21.

[0076] The gripper connection structure 34 of the bracket assembly 3 through the slide rail motor 1 is suitable for at least partially overlapping with the projections of the first slide rail 21 and the second slide rail 22 in the vertical plane, which can make full use of the space on both sides of the seat slide rail 2, reduce the space occupied under the seat, and facilitate the design of the seat.

[0077] In some embodiments, a first positioning portion 211 is provided along the length direction on one side of the first slide rail 21 away from the second slide rail 22, and a second positioning portion 341 is provided on the gripper connection structure 34. The first positioning portion 211 and the second positioning portion 341 are suitable for interlocking connection. The first positioning portion 211 and the second positioning portion 341 can assist the gripper connection structure 34 in engaging and positioning with the first slide rail 21, so as to facilitate the alignment and matching of the square head of the guiding drive shaft 161 with the square hole of the HDM gear box between the first slide rail 21 and the second slide rail 22.

[0078] In some embodiments, the first positioning portions 211 and the second positioning portions 341 are of multiple types and the same number. Multiple types of first positioning portions 211 and second positioning portions 341 are used to achieve pre-positioning between the first slide rail 21 and the gripper connection structure 34, making the positioning more accurate.

[0079] like Fig.11 In the illustrated embodiment, the first positioning portion 211 includes one or more first positioning blocks and a first positioning port 121, the second positioning portion 341 includes one or more second positioning ports 121 and a second positioning block, the first positioning block and the second positioning port 121 cooperate for positioning, and the first positioning port 121 and the second positioning block cooperate for positioning to improve the accuracy of the cooperative connection between the first slide rail 21 and the gripper connection structure 34.

[0080] like Fig.11 In the illustrated embodiment, a locking opening 342 is provided at the front end of the gripper connection structure 34, and a detachable locker 212 is provided on the first slide rail 21. The locking opening 342 and the locker 212 are suitable for locking with each other. The locker 212 can ensure that the gripper connection structure 34 is fixed on the first slide rail 21, thereby reducing the probability of shaking and making abnormal noises of the bracket assembly 3 on the first slide rail 21.

[0081] In some embodiments, the lock 212 may be a lock 212 in the form of a bolt structure.

[0082] like Figure 6 and 11 In the illustrated embodiment, the gripper connection structure 34 is provided with a drive channel 343 along the connection direction between the transmission device 23 and the slide rail motor 1, and the drive shaft 161 is suitable for being accommodated in the drive channel 343. The gripper connection structure 34 can provide covering protection for the peripheral side of the drive shaft 161, thereby reducing the probability of the drive shaft 161 contacting foreign objects.

[0083] like Figure 6 and 7 In the illustrated embodiment, the slide rail motor 1 includes a housing 14, an end cover 15 and a drive assembly 16. The drive assembly 16 is suitable for being arranged in the housing 14. The end cover 15 is suitable for closing the drive side of the housing 14. A positioning column 162 is provided at the front end of the drive assembly 16. The positioning column 162 is suitable for abutting against the end cover 15 and forming a control chamber 11 between the end cover 15 and the drive assembly 16. The positioning column 162 can shape the control chamber 11, stabilize the structure of the control chamber 11, and protect the controller in the control chamber 11.

[0084] like Figure 6 and 7In the illustrated embodiment, a positioning hole 121 is provided on the control module 12, and a positioning column 162 is suitable for being engaged with the positioning hole 121 and limiting the movement of the control module 12. The positioning column 162 can reduce the difficulty of installing and aligning the control module 12 and is fixed in the control chamber 11. If the control module 12 and the slide rail motor 1 are directly connected through pins before, the positioning column 162 can effectively improve the stability of the connection between the control module 12 and the slide rail motor 1.

[0085] like Figure 8 In the illustrated embodiment, the two slide rail motors 1 have opposite rotation directions when driving the seat slide rail 2. An interface module 4 is provided on the outer peripheral side of the slide rail motor 1. The interface module 4 is provided with a first pin, a second pin, a third pin and a fourth pin. The first pin is suitable for connecting to the positive pole of the power supply, the second pin is suitable for connecting to the negative pole of the power supply, the third pin is suitable for connecting to the communication bus, and the fourth pin is suitable for being idle or short-circuited to ground, so as to distinguish the rotation direction of the slide rail motor 1.

[0086] In the present application, since different seat slides 2 rotate in opposite directions according to the different installation positions of the slide motor 1 when in operation, they need to be distinguished. By designing the fourth pin as a configuration line, it can be used to identify and set the rotation direction of the slide motor 1. After using this solution, the controllers in different slide motors 1 can share a set of programs, and the rotation distinction of the slide motor 1 can be achieved by configuring the connection between the wiring harness and the pins. It has stronger versatility and is simpler and more convenient to install.

[0087] like Figure 8 In the illustrated embodiment, the interface module 4 is connected to the controller and the drive assembly 16 through the housing 14 at the outside of the housing 14, so that the interface module 4 is externally placed for easy connection.

[0088] In some embodiments, the interface of the interface module 4 is oriented away from the driving side of the slide rail motor 1 , which can reduce structural interference during the wiring process of the interface module 4 .

[0089] In some embodiments, the interface module of the slide rail motor is located on the side of the corresponding movable slide rail away from the other movable slide rail, so that the interface module can perform wiring harness connection on the outside of the movable slide rail, thereby reducing the occupancy of the inner side of the movable slide rail, that is, the space under the seat.

[0090] The above describes the basic principles, main features and advantages of the present application. Technical personnel in this industry should understand that the present application is not limited to the above embodiments. The above embodiments and the specification only describe the principles of the present application. Without departing from the spirit and scope of the present application, the present application will also have various changes and improvements. These changes and improvements all fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A method for driving the synchronous movement of double seat slide motors based on a communication bus, characterized in that: The invention comprises two slide rail motors and two sets of seat slide rails, wherein the slide rail motors and the seat slide rails are arranged in a one-to-one manner, the slide rail motors are suitable for driving the seat slide rails, a control chamber is provided on the slide rail motor, a control module is arranged in the control chamber, the control module and the slide rail motor are directly connected through pins, and the synchronous motion method comprises the following steps: S100, establishing a communication connection between control modules of two slide rail motors by using a communication bus, the control modules collecting status information of corresponding slide rail motors, and transmitting the status information to the communication bus for information exchange; S200, deriving a target speed of the slide rail motor according to the running speed of the seat slide rail, and making the real-time speed of the slide rail motor converge to the target speed through calculation by the control module; S300, acquiring position information in the state information of the slide rail motor in real time, comparing the position difference between the position information of the two slide rail motors, if the position difference exceeds the allowable value, the control module adjusts the real-time rotation speed of the slide rail motor, if the position difference is within the allowable value, the control module keeps the slide rail motor at a constant rotation speed; S400, calculating the maximum output power through the parameters of the slide rail motor, setting a value lower than the maximum output power as a critical value, and when the current output power of the slide rail motor is greater than the critical value, the slide rail motor is driven at a reduced speed or stops driving.

2. The method for driving the synchronous movement of double seat rail motors based on a communication bus as claimed in claim 1, characterized in that: The communication bus is a LIN bus, a master node is set on the communication bus, and the two control modules are used as slave nodes, or the communication bus is a LIN bus or an IIC bus or an SPI bus, one control module is used as the master node, and the other control module is used as the slave node; a body BCM module is set in the communication bus, and the body BCM module is suitable as the master node.

3. The method for driving the synchronous movement of the double seat slide motors based on a communication bus as claimed in claim 2, characterized in that: Set the priority of data reporting and transmission to the communication bus; use event trigger mechanism to send data when the state of the slide motor changes; the master node sends synchronization instructions uniformly and coordinates the actions of each node through timestamp marking; A pre-compensation algorithm is added to the slave node to predict the compensation delay based on historical data; the master node periodically sends bus status detection frames to the slave node, and the slave node automatically resets and resynchronizes when it detects a bus abnormality.

4. The method for driving the synchronous movement of double seat rail motors based on a communication bus as claimed in claim 1, characterized in that: The control module includes a controller and a position sensor, the controller is suitable for obtaining the rotation speed, driving power and PMW information of the slide rail motor, and the position sensor is suitable for obtaining the position information of the slide rail motor; when the position difference between the position information of the two slide rail motors exceeds the allowable value, the PWM duty cycle of the slide rail motor is adjusted through the control module, so that the slide rail motor with the leading position runs at a speed lower than the target speed, and the slide rail motor with the lagging position runs at a speed higher than the target speed; Two-thirds of the maximum output power is set as the critical value. When the current output power of the slide motor is greater than the critical value, the slide motor is driven at a reduced speed or stops driving.

5. A synchronous motion system for dual seat slide motors driven by a communication bus, characterized in that: The invention comprises two slide rail motors and two groups of seat slide rails, wherein the slide rail motors and the seat slide rails are arranged in a one-to-one manner, and the slide rail motors are suitable for driving the seat slide rails by the synchronous motion method described in any one of claims 1 to 4. A control chamber is provided on the slide rail motor, and a control module is arranged in the control chamber. The control module and the slide rail motor are directly connected through pins.

6. A communication bus-based dual-seat slide motor synchronous motion system as claimed in claim 5, characterized in that: A bracket assembly is arranged between the slide rail motor and the seat slide rail, a connecting seat is arranged on the bracket assembly, a through hole is arranged on the connecting seat, a vibration isolation pad is arranged in the connecting seat, a first rotating clamping structure is arranged on the peripheral side of the connecting seat, a second rotating clamping structure is arranged on the peripheral side of the driving side of the slide rail motor, the driving shaft of the slide rail motor is suitable for passing through the through hole and making the driving side of the slide rail motor tightly fit to the vibration isolation pad, and the slide rail motor is suitable for rotating along the circumferential direction so that the first rotating clamping structure and the second rotating clamping structure are matched and locked.

7. A communication bus-based dual-seat slide motor synchronous motion system as claimed in claim 6, characterized in that: The first rotating clamping structure includes a slot portion and a barb portion, and the second rotating clamping structure includes a boss portion and a groove portion. The slot portion and the boss portion are suitable for matching and connecting to limit the slide rail motor from being separated from the connecting seat, the barb portion and the groove portion are suitable for matching and connecting to limit the slide rail motor from being separated from the connecting seat, and the boss portion is suitable for moving in the slot portion so that the barb portion matches the groove portion.

8. The synchronous motion system of dual seat rail motors driven by a communication bus as claimed in claim 6, characterized in that: The first rotating clamping structure includes a guide groove and a fixed groove, and the second rotating clamping structure includes a boss portion, the guide groove and the fixed groove are distributed at intervals along the circumference of the connecting seat, and a movable clamping portion is provided on the side of the guide groove close to the fixed groove, and the boss portion is suitable for entering the guide groove along the axial direction of the connecting seat, and when the boss portion is suitable for axial movement along the connecting seat, the movable clamping portion is suitable for elastic deformation along the radial direction of the connecting seat, so that the boss portion is suitable for entering the fixed groove from the guide groove, and the movable clamping portion and the boss portion are suitable for cooperating to limit and fix the boss portion; the width of the guide groove tends to shrink from the side away from the fixed groove to the side close to the fixed groove, and is connected with the movable clamping portion, and one end of the boss portion tends to shrink toward the other end; the guide groove, the fixed groove and the boss portion are all knife-shaped structures.

9. The synchronous motion system of dual seat rail motors driven by a communication bus as claimed in claim 6, characterized in that: The seat slide rail comprises a first slide rail and a second slide rail, a transmission device is arranged between the first slide rail and the second slide rail, the transmission device is suitable for making the first slide rail and the second slide rail slide relative to each other, the slide rail motor is suitable for being fixed on the first slide rail through the bracket assembly and being connected with the transmission device, the bracket assembly is provided with a gripper connection structure, the front end of the gripper connection structure is suitable for being buckled and connected on both sides of the first slide rail away from the second slide rail and the side adjacent to the first slide rail, and the slide rail motor is arranged close to the second slide rail; the first slide rail is provided with a first positioning part along the length direction of the side away from the second slide rail, the gripper connection structure is provided with a second positioning part, the first positioning part and the second positioning part are suitable for being engaged and connected; the first positioning part and the second positioning part are of multiple types and the same number; the front end of the gripper connection structure is provided with a locking port, the first slide rail is provided with a detachable locker, the locking port and the locker are suitable for locking with each other; the gripper connection structure is provided with a driving channel along the connection direction of the transmission device and the slide rail motor, and the driving shaft of the slide rail motor is suitable for being accommodated in the driving channel.

10. The synchronous motion system of dual seat rail motors driven by a communication bus as claimed in claim 5, characterized in that: The slide rail motor includes a shell, an end cover and a drive assembly, wherein the drive assembly is suitable for being arranged in the shell, the end cover is suitable for closing the drive side of the shell, a positioning column is provided at the front end of the drive assembly, the positioning column is suitable for abutting against the end cover, and the control chamber is formed between the end cover and the drive assembly; the two slide rail motors rotate in opposite directions when driving the seat slide rails, an interface module is provided on the outer peripheral side of the slide rail motor, and a first pin, a second pin, a third pin and a fourth pin are provided on the interface module, the first pin is suitable for connecting the positive pole of the power supply, the second pin is suitable for connecting the negative pole of the power supply, and the third pin is suitable for connecting the positive pole of the power supply. The communication bus is connected, and the fourth pin is suitable for being vacant or short-circuited to ground to distinguish the rotation direction of the slide rail motor; the interface module passes through the shell outside the shell and is connected to the controller and the drive component; a positioning port is opened on the control module, and the positioning column is suitable for being engaged with the positioning port and limiting the movement of the control module; the control chamber is located near the drive side of the slide rail motor, the drive shaft of the slide rail motor passes through the control chamber, and the control module is coaxially and spacedly nested on the circumference of the drive shaft of the slide rail motor; the interface module of the slide rail motor is located on the side of the corresponding movable rail away from the other movable rail.

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