An automobile seat electric slide rail and a method for adjusting position synchronization thereof

Abstract

The application provides a kind of automobile seat electric slide rail and its position synchronization adjustment method, belong to automobile seat electric slide rail technical field.It solves the problem that the time of two guide rails is not synchronized when automobile seat reaches limit position in prior art.The automobile seat electric slide rail includes a pair of guide rails, each guide rail includes outer rail and inner rail slidingly installed on outer rail, the outer rail is provided with screw rod along its length direction, and the rear end of screw rod is fixed on outer rail through rear support, the inner rail is provided with gear box, the output shaft of gear box has axial through hole, and the output shaft is sleeved on screw rod and is threadedly connected with screw rod, and the rear support can limit the movement of gear box along screw rod.The application has the advantage of ensuring the absolute synchronization of the position of two guide rails of automobile seat electric slide rail.

Description

Technical Field

[0001] This invention belongs to the field of automotive seat electric slide rail technology, and relates to an automotive seat electric slide rail and a method for adjusting its position synchronization. Background Technology

[0002] Electric sliding rails for car seats are installed under the car seats to fix the car seats and adjust their fore-and-aft position to ensure the comfort of the driver and passengers. For example, Chinese patent literature discloses an electric sliding rail for car seats (authorization announcement number: CN 214450438U), which includes two parallel sliding rails connected to the car floor, two sliding members that are movably engaged with the sliding rails, a dual-axis motor located between the two sliding rails, and two output shafts connected to both ends of the dual-axis motor. The top of the sliding member is provided with several fixing screws for fixing the car seat. The interior of each of the two sliding rails is provided with a fixing screw whose axis is parallel to the axis of the sliding rail. It also includes a sliding mechanism for sliding the sliding member on the fixing screw. The sliding mechanism is driven by the output shafts.

[0003] Currently, in the manufacturing process of electric sliding rails, after the two guide rails are assembled and connected to the dual-axis motor, manufacturers need to adjust the inner rails of the two guide rails to the same fixed position (i.e., the shipping position) before delivery, according to customer requirements. In existing technology, the conventional practice is to manually adjust the position of the inner rails of the two guide rails separately. Specifically, the operator first marks the shipping position of the inner rail on the outer rail of the guide rail, then the operator clamps and fixes the outer rail of the guide rail, and then the inner rail of the drive guide rail slides to the marked position. The above operation steps are repeated for both guide rails. However, this adjustment method is not only inefficient, but also makes it difficult to ensure the consistency of the shipping position of the two guide rails of the electric sliding rail. This results in the two guide rails reaching the limit position at different times when the car seat slides. When the car seat is adjusted to the limit position, the passenger can feel the twisting of the car seat and hear two impact sounds from the limit of the slide rails, resulting in a poor riding experience. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a method for adjusting the position synchronization of an electric sliding rail for automotive seats. The technical problem this invention aims to solve is how to ensure the positional synchronization of the two guide rails of the electric sliding rail for automotive seats.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] An electric sliding rail for automotive seats includes a pair of guide rails, each guide rail comprising an outer rail and an inner rail slidably mounted on the outer rail. The outer rail is characterized by having a lead screw along its length, with the rear end of the lead screw fixed to the outer rail via a rear support. A gearbox is mounted on the inner rail, the gearbox having an axially penetrating shaft hole, and the output shaft is sleeved on and threadedly connected to the lead screw. The rear support limits the movement of the gearbox along the lead screw. The rear support ensures the lead screw is more securely mounted on the outer rail and, when the gearbox moves along the lead screw to abuts against the rear support, the rear support impedes further movement of the gearbox, effectively stalling the servo motor and facilitating subsequent synchronous adjustments to the position of the electric sliding rail for the automotive seat.

[0007] In the aforementioned electric sliding rail for automotive seats, the gearbox is fixed to the inner rail by a bracket, which passes through a lead screw. The bracket at least covers the outer side of the gearbox near the rear support and abuts against the rear support. By providing the bracket, on the one hand, the installation of the gearbox to the inner rail is facilitated, and the gearbox is more securely mounted on the inner rail. Simultaneously, the gearbox, driven by a servo motor, drives the inner rail to move synchronously. The gearbox also serves to reduce speed and increase torque. On the other hand, the bracket on the outer side of the gearbox protects it, preventing direct contact with the rear support and potential damage.

[0008] In the aforementioned electric sliding rail for automotive seats, the opposing surfaces of the bracket and the rear support can abut against each other. By setting the opposing surfaces of the bracket and the rear support to a structure that allows them to abut against each other, the contact area between the bracket and the rear support is larger and the force is more evenly distributed when they abut against each other.

[0009] In the aforementioned electric sliding rail for automotive seats, the bracket includes a U-shaped plate and straight plate wings located on both sides of the U-shaped plate. The plate wings and the U-shaped plate are integrally formed, and the U-shaped plate encloses the gearbox. Each plate wing has a mounting hole for fixed connection with the inner rail. The bracket with this structure has a more regular shape, which facilitates manufacturing and enhances the structural strength of the bracket. Furthermore, the U-shaped plate of the bracket can completely enclose the gearbox, providing better protection. The two plate wings with mounting holes facilitate the assembly and disassembly of the bracket from the inner rail, allowing the gearbox to be more securely mounted on the inner rail.

[0010] In the aforementioned electric sliding rail for automotive seats, the rear support includes a vertically arranged support plate and a fixing plate vertically connected to the support plate. The support plate and the fixing plate are integrally formed, and the fixing plate has fixing holes for fixed connection with the outer rail. The bracket shape of the above structure is more regular, that is, it is an L-shape with the right angle facing outwards. On the one hand, it is convenient for processing and manufacturing, enhances the structural strength of the bracket, and on the other hand, it facilitates the abutment of the bracket with the rear support.

[0011] In the aforementioned electric sliding rail for automotive seats, the outer wall of the gearbox output shaft has worm gears, and the outer wall of the gearbox input shaft has worm teeth that mesh with the worm gears. Furthermore, each end of the gearbox input shaft has a square hole. This gearbox structure is simple, enabling miniaturization and allowing it to be installed within the limited space of the sliding rail. It also provides good speed reduction and torque increase. The square hole at the end of the gearbox input shaft facilitates connection to a servo motor. Specifically, a drive shaft with a shape matching the square hole is fixed to the output shaft of the servo motor, and then the drive shaft is inserted into the square hole of the gearbox input shaft to connect the output shaft of the servo motor to the input shaft of the gearbox. This design allows for easy assembly and disassembly and ensures a stable connection.

[0012] In the aforementioned electric sliding rail for automotive seats, the front end of the lead screw is fixed to the outer rail via a front support, and the lead screw is positioned inside the outer rail and parallel to its bottom. By providing the front support, the front and rear supports work together to support and fix the lead screw, and the lead screw is parallel to the bottom of the outer rail, allowing the gearbox to move more effectively along the lead screw.

[0013] A method for adjusting the position synchronization of an electric slide rail for a car seat, characterized by comprising the following steps:

[0014] a. Connecting the servo motor: First, connect the input shaft of the gearbox of either of the two guide rails of the car seat electric slide rail to the output shaft of the servo motor that is electrically connected to the PLC controller.

[0015] b. Setting the reference point for the servo motor's rotation position: First, the PLC controller starts the servo motor. Then, the servo motor drives the inner rail of the guide rail to slide relative to the outer rail through the gearbox until the bracket on the inner rail abuts against the rear support of the lead screw. At this time, the servo motor is stalled. When the PLC controller detects that the servo motor is at its maximum current value, the PLC controller controls the servo motor to stop rotating and sets the current rotation position information of the servo motor as the reference point for the servo motor's rotation position.

[0016] c. Determine the number of rotations of the servo motor: Input the distance L between the inner rail of the guide rail and the rear support of the lead screw into the PLC controller in advance. Then, the PLC controller calculates the number of rotations N of the servo motor according to the formula N=L / (I*P), where I is the transmission ratio of the gearbox and P is the lead of the lead screw.

[0017] d. Adjust the position of the inner rail of the guide rail: Using the reference point of the servo motor rotation position as the reference position, the PLC controller controls the servo motor to rotate N times in the opposite direction from the reference position and then stop rotating, so that the inner rail of the guide rail slides from the position that abuts against the rear support to the shipping position and stops.

[0018] e. Adjust the delivery position of the other inner rail: Repeat the adjustment method of step a and b above to adjust the position of the other inner rail of the electric sliding rail for the car seat to the same delivery position as the aforementioned inner rail.

[0019] Controlling the rotation position of a servo motor requires first determining a reference point within the motor's operating space. Then, the real-time position of the servo motor is determined using this reference point. This process is called setting the reference point for the servo motor's rotation position. The servo motor's rotation is driven by pulse signals emitted by the PLC controller. Specifically, the PLC controller sends pulse signals, and the servo motor receives these signals to rotate its rotor at the angle specified by the pulse signal. For example, assuming the PLC controller sends 5000 pulse signals to the servo motor through the control circuit, the servo motor rotor will rotate one revolution (360 degrees). Each pulse signal corresponds to an angle increment of 0.072 (360 / 5000) degrees for the motor rotor. Therefore, the servo motor can achieve high-precision control.

[0020] The stall in step b refers to the servo motor still rotating, but because the bracket on the inner rail is pressed against the rear support of the lead screw, the inner rail can no longer move relative to the outer rail. At this time, it is equivalent to a sudden increase in load, which causes a sudden increase in the torque output of the servo motor, and the current will also increase accordingly. The PLC controller can monitor the current of the servo motor through a current sensor.

[0021] The servo motor drives the input shaft of the gearbox to rotate, which is then converted into the output shaft of the gearbox moving linearly along the lead screw. This, in turn, drives the inner rail of the guide rail to move relative to the outer rail along the lead screw. Since the lead screw's lead P (the lead screw's lead refers to the distance the gearbox's output shaft moves along the lead screw for one revolution of the servo motor) and the gearbox's transmission ratio I are fixed values, the PLC controller can calculate the number of revolutions N required for the servo motor to rotate according to the formula N = L / (I*P) by pre-inputting the distance L between the inner rail's delivery position and the lead screw's rear support. This allows the PLC controller to control the movement. The servo motor rotates N revolutions in the opposite direction to its rotational reference point before stopping, causing the inner rail of the guide rail to slide from the position abutting against the rear support to the delivery position and stop. At the same time, because the two guide rails of the electric slide rail are adjusted with the lead screw rear support as the reference position, the consistency of the delivery position of the two guide rails of the electric slide rail can be ensured, thereby ensuring the position synchronization of the two guide rails of the car seat electric slide rail. This ensures that the two guide rails reach the rear limit position at the same time when the car seat slides, avoiding the occurrence of twisting sensation in the car seat.

[0022] In the above-described method for adjusting the synchronization of the electric sliding rail position of an automotive seat, in step a, a drive shaft adapted to the shape of a square hole is fixed on the output shaft of the servo motor, and then the drive shaft is inserted into the square hole of the input shaft of the gearbox to connect the output shaft of the servo motor with the input shaft of the gearbox. By fixing a drive shaft adapted to the shape of a square hole on the output shaft of the servo motor, the connection between the output shaft of the servo motor and the input shaft of the gearbox can be achieved simply by inserting the drive shaft into the square hole of the input shaft of the gearbox during operation. The operation is simple and convenient, and the connection stability is good.

[0023] In the aforementioned method for adjusting the synchronization of the electric sliding rail position of an automotive seat, in step b, when the servo motor is stalled, the PLC controller can monitor the output torque of the servo motor. When the PLC controller detects that the servo motor is at its maximum torque, it controls the servo motor to stop rotating and sets the currently stored rotation position information of the servo motor as the reference point for the servo motor's rotation position. The monitoring of the servo motor's output torque by the PLC controller can be achieved using a torque sensor.

[0024] Compared with existing technologies, the electric slide rail for automotive seats and its method for adjusting position synchronization have the following advantages: 1. Operators only need to connect the output shaft of the servo motor to the input shaft of the gearbox. The PLC controller, which is electrically connected to the servo motor, can automatically adjust the inner rail of the guide rail to the delivery position according to the preset distance value L. The operation is simple and convenient.

[0025] 2. The PLC controller adjusts the position of the inner rail of the guide rail by controlling the number of rotations of the servo motor. At the same time, the adjustment of the two guide rails is based on the rear support of the lead screw, thus ensuring the absolute synchronization of the positions of the two guide rails of the electric slide rail of the car seat. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of a single guide rail of the electric sliding rail for car seats.

[0027] Figure 2 This is a 3D structural diagram of a single guide rail of the electric sliding rail for car seats after removing the inner and outer rails.

[0028] Figure 3 This is a cross-sectional view of a single guide rail of the electric sliding rail for this car seat after removing the inner and outer rails.

[0029] Figure 4 This is a schematic diagram of the three-dimensional structure of the electric sliding rail for this car seat after the two guide rails are assembled.

[0030] In the diagram, 1 is the guide rail; 1a is the outer rail; 1b is the inner rail; 2 is the lead screw; 3 is the front support; 4 is the rear support; 4a is the support plate; 4b is the fixing plate; 4b1 is the fixing hole; 5 is the bracket; 5a is the U-shaped plate; 5b is the plate wing; 5b1 is the mounting hole; 6 is the gearbox; 6a is the output shaft; 6a1 is the worm gear; 6b is the input shaft; 6b1 is the worm gear; 6b2 is the square hole; and 7 is the dual-axis motor. Detailed Implementation

[0031] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings to further illustrate the technical solutions of the present invention. However, the present invention is not limited to these embodiments.

[0032] Example 1

[0033] An electric sliding rail for car seats, as shown in the reference Figure 1-4 The system includes a pair of guide rails 1, each guide rail 1 including an outer rail 1a and an inner rail 1b slidably mounted on the outer rail 1a. A lead screw 2 is provided along the length of the outer rail 1a. The front end of the lead screw 2 is fixed to the outer rail 1a by a front support 3, and the rear end of the lead screw 2 is fixed to the outer rail 1a by a rear support 4. The lead screw 2 is located inside the outer rail 1a and is opposite to and parallel to the bottom of the outer rail 1a. A gearbox 6 is provided on the inner rail 1b. The output shaft 6a of the gearbox 6 has an axially penetrating shaft hole, and the output shaft 6a is sleeved on the lead screw 2 and threadedly connected to the lead screw 2. The rear support 4 can limit the movement of the gearbox 6 along the lead screw 2.

[0034] Reference Figure 2 and Figure 3Specifically, the gearbox 6 is fixed to the inner rail 1b by a bracket 5, the bracket 5 is threaded through the lead screw 2, and the bracket 5 at least covers the outer side of the gearbox 6 near the rear support 4 and can abut against the rear support 4. In this embodiment, it is preferable that the opposing surfaces of the bracket 5 and the rear support 4 can abut against each other. More specifically, the bracket 5 includes a U-shaped plate portion 5a and plate wings 5b located on both sides of the U-shaped plate portion 5a and in the shape of straight plates. The plate wings 5b and the U-shaped plate portion 5a are integrally formed, and the U-shaped plate portion 5a covers the gearbox 6 inside. Each plate wing portion 5b has a mounting hole 5b1 for fixed connection with the inner rail 1b.

[0035] Reference Figure 2 and Figure 3 Specifically, the rear support 4 includes a support plate 4a arranged vertically and a fixing plate 4b vertically connected to the support plate 4a. The support plate 4a and the fixing plate 4b are integrally formed, and the fixing plate 4b is provided with a fixing hole 4b1 for fixed connection with the outer rail 1a.

[0036] Reference Figure 2 and Figure 3 Specifically, the outer wall of the output shaft 6a of the gearbox 6 has a worm gear 6a1, the outer wall of the input shaft 6b of the gearbox 6 has a worm gear 6b1 that meshes with the worm gear 6a1, and each end of the input shaft 6b of the gearbox 6 has a square hole 6b2.

[0037] A method for adjusting the position synchronization of an electric sliding rail for a car seat includes the following steps:

[0038] a. Connecting the servo motor: First, connect the input shaft 6b of the gearbox 6 of either of the two guide rails 1 of the electric sliding rail of the car seat to the output shaft of the servo motor electrically connected to the PLC controller. It should be noted that after the input shaft 6b of the gearbox 6 of the guide rail 1 is connected to the output shaft of the servo motor, the inner rail 1b of the guide rail 1 and the servo motor move synchronously. That is, the servo motor must not only drive the inner rail 1b of the guide rail 1 to move relative to the outer rail 1a through the gearbox 6, but also move synchronously with the gearbox 6 itself (the outer rail of the guide rail can be fixed on the worktable, the servo motor can be slidably set on the worktable, and the PLC can control the servo motor to slide so that it moves synchronously with the gearbox 6), so that its relative position with the gearbox 6 remains unchanged, so that the servo motor can maintain the connection relationship with the gearbox 6 during the movement of the gearbox 6.

[0039] b. Setting the reference point for the rotation position of the servo motor: First, the PLC controller starts the servo motor. Then, the servo motor drives the inner rail 1b of the guide rail 1 to slide relative to the outer rail 1a through the gearbox 6 until the bracket 5 on the inner rail 1b abuts against the rear support 4 of the lead screw 2. At this time, the servo motor is stalled. When the PLC controller detects that the servo motor is at the maximum current value, the PLC controller controls the servo motor to stop rotating and sets the rotation position information stored in the current servo motor as the reference point for the rotation position of the servo motor.

[0040] Controlling the rotational position of a servo motor requires first determining a reference point within the servo motor's rotational space. Then, the real-time position of the servo motor is determined using this reference point. This process of determining the reference point is called setting the reference point for the servo motor's rotational position. Stalling refers to a situation where the servo motor is still rotating, but because the bracket on the inner rail is pressed against the rear support of the lead screw, the inner rail can no longer move relative to the outer rail. At this point, it's equivalent to a sudden increase in load, resulting in a sudden increase in the torque output of the servo motor, and the current will also increase accordingly. The PLC controller can monitor the servo motor current using a current sensor. The maximum current value is preset by the operator and input into the PLC controller.

[0041] c. Determine the number of rotations of the servo motor: Input the distance L between the inner rail 1b of guide rail 1 and the rear support 4 of lead screw 2 into the PLC controller in advance. Then, the PLC controller calculates the number of rotations N of the servo motor according to the formula N=L / (I*P), where I is the transmission ratio of gearbox 6 and P is the lead of lead screw 2.

[0042] The rotation drive of the servo motor is achieved by the PLC controller sending pulse signals. Specifically, the PLC controller sends pulse signals, and the servo motor receives these pulse signals to make the rotor of the servo motor rotate at the angle specified by the pulse signal. For example, assuming that the PLC controller sends 5000 pulse signals to the servo motor through the control circuit, the servo motor rotor will rotate one revolution (i.e., 360 degrees). Then each pulse signal corresponds to an angle increment of 0.072 (360 / 5000) degrees of the motor rotor. Therefore, the servo motor can achieve the requirements of high-precision control. The number of revolutions N is not necessarily an integer.

[0043] d. Adjust the position of the inner rail 1b of guide rail 1: Using the reference point of the servo motor rotation position as the reference position, the PLC controller controls the servo motor to rotate N times in the opposite direction from the reference position and then stop rotating, so that the inner rail 1b of guide rail 1 slides from the position abutting against the rear support 4 to the delivery position and stops.

[0044] The servo motor drives the input shaft 6b of the gearbox 6 to rotate, which is then converted into the output shaft 6a of the gearbox 6 moving linearly along the lead screw 2. This, in turn, drives the inner rail 1b of the guide rail 1 to move relative to the outer rail 1a along the lead screw 2. Since the lead P of the lead screw 2 (the lead of the lead screw 2 refers to the distance that the output shaft 6a of the gearbox 6 moves along the lead screw 2 when the servo motor rotates one revolution) and the transmission ratio I of the gearbox 6 are fixed values, as long as the distance L between the inner rail 1b of the guide rail 1 and the rear support 4 of the lead screw 2 is input in advance, the PLC controller can calculate the number of revolutions N that the servo motor needs to rotate according to the formula N = L / (I * P), and control the servo motor to rotate N revolutions in the opposite direction relative to the reference point of its rotation position before stopping, so that the inner rail 1b of the guide rail 1 slides from the position abutting against the rear support 4 to the position of delivery and stops.

[0045] e. Adjust the delivery position of the other guide rail 1 inner rail 1b: Repeat the adjustment method of step a and b above to adjust the position of the other guide rail 1 inner rail 1b of the car seat electric slide rail to the same delivery position as the aforementioned guide rail 1 inner rail 1b. (Refer to...) Figure 4 The two guide rails 1 of the electric sliding rail of this car seat are also assembled and connected by a dual-axis motor 7, and the two guide rails 1 are driven to move synchronously by the dual-axis motor 7.

[0046] Because the two guide rails of the electric slide rail are adjusted to the same position as the lead screw support, the consistency of the two guide rails' positions can be ensured. This ensures the synchronization of the two guide rails' positions, so that the two guide rails reach the rear limit position at the same time when the car seat slides, thus avoiding the feeling of twisting in the car seat.

[0047] Example 2

[0048] This embodiment is basically the same in structure and principle as Embodiment 1. The difference is that in step a of Embodiment 1, a drive shaft adapted to the shape of the square hole 6b2 is fixed on the output shaft of the servo motor, and then the drive shaft is inserted into the square hole 6b2 of the input shaft 6b of the gearbox 6 to connect the output shaft of the servo motor with the input shaft 6b of the gearbox 6. By fixing a drive shaft adapted to the shape of the square hole on the output shaft of the servo motor, the connection between the output shaft of the servo motor and the input shaft of the gearbox can be achieved by directly inserting the drive shaft into the square hole of the input shaft of the gearbox. The operation is simple and convenient, and the connection stability is good.

[0049] Example 3

[0050] This embodiment is basically the same in structure and principle as Embodiment 1. The difference is that in step b of Embodiment 1, when the servo motor is stalled, the PLC controller can also monitor the output torque of the servo motor. When the PLC controller detects that the servo motor is at its maximum torque, it controls the servo motor to stop rotating and sets the currently stored rotation position information of the servo motor as the reference point for the servo motor's rotation position. The monitoring of the servo motor's output torque by the PLC controller can be achieved through a torque sensor, and the maximum torque value is preset by the operator and input into the PLC controller.

[0051] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A method for adjusting the position synchronization of an electric slide rail for a car seat, characterized in that, Includes the following steps: a. Connecting the servo motor: First, connect the input shaft (6b) of the gearbox (6) of either of the two guide rails (1) of the electric slide rail of the car seat to the output shaft of the servo motor of the PLC controller. b. Setting the reference point for the rotation position of the servo motor: First, the PLC controller starts the servo motor, and then the servo motor drives the inner rail (1b) of the guide rail (1) to slide relative to the outer rail (1a) through the gearbox (6) until the bracket (5) on the inner rail (1b) abuts against the rear support (4) of the lead screw (2). At this time, the servo motor is stalled. When the PLC controller detects that the servo motor is at the maximum current value, the PLC controller controls the servo motor to stop rotating and sets the rotation position information stored in the current servo motor as the reference point for the rotation position of the servo motor. c. Determine the number of rotations of the servo motor: Input the distance L between the delivery position of the inner rail (1b) of the guide rail (1) and the rear support (4) of the lead screw (2) in advance on the PLC controller, and then the PLC controller calculates the number of rotations N of the servo motor according to the formula N=L / (I×P), where I is the transmission ratio of the gearbox (6) and P is the lead of the lead screw (2). d. Adjust the position of the inner rail (1b) of the guide rail (1): With the reference point of the servo motor rotation position as the reference position, the PLC controller controls the servo motor to rotate N times in the opposite direction from the reference position and then stop rotating, so that the inner rail (1b) of the guide rail (1) slides from the position that abuts against the rear support (4) to the delivery position and stops. e. Adjust the delivery position of the inner rail (1b) of the other guide rail (1): Repeat the adjustment method of step ad above to adjust the position of the inner rail (1b) of the other guide rail (1) of the electric slide rail of the car seat to the same delivery position as the inner rail (1b) of the aforementioned guide rail (1).

2. The method for adjusting the position synchronization of an electric slide rail for a car seat according to claim 1, characterized in that, In step a above, a drive shaft that matches the shape of the square hole (6b2) is fixed on the output shaft of the servo motor, and then the drive shaft is inserted into the square hole (6b2) of the input shaft (6b) of the gearbox (6) so that the output shaft of the servo motor is connected to the input shaft (6b) of the gearbox (6).

3. The method for adjusting the position synchronization of an electric slide rail for a car seat according to claim 1, characterized in that, In step b above, when the servo motor is stalled, the PLC controller monitors the output torque of the servo motor. When the PLC controller detects that the servo motor is at its maximum torque, the PLC controller controls the servo motor to stop rotating and sets the current rotation position information of the servo motor as the reference point for the rotation position of the servo motor.

Images