Control method of driving module for lift shock-absorbing seat base and driving module

Abstract

The present application belongs to the general vehicle technical field, and particularly relates to a movable seat, and especially relates to a control method of a driving module for a lifting shock-absorbing seat base and the driving module. The control method of the driving module for the lifting shock-absorbing seat base comprises the following steps: a control module acquires parameters of a seat motor; the control module acquires a current tooth side gap according to the parameters; the control module acquires a wear amount according to the current tooth side gap; the control module acquires a corresponding pulse number according to the wear amount, and controls the rotation number of a seat motor output shaft according to the pulse number, so that the corresponding pulse number of the seat motor is adjusted in real time according to the wear amount of the current gear, the adjustment of the automobile seat is more accurate, and the automobile seat can be more accurately moved to a required position.

Description

Technical Field

[0001] This invention belongs to the field of general vehicle technology, specifically relating to movable seats, and more particularly to a control method and drive module for a liftable and shock-absorbing seat base. Background Technology

[0002] Car seats need to be moved to accommodate the needs of different passengers. In order to achieve lightweight and low noise, the gears of the seat motor are usually made of plastic. Therefore, wear of the gears is unavoidable, which can cause deviations in the movement of the car seat.

[0003] Therefore, due to the technical problem of deviation in the movement of car seats caused by gear wear, it is necessary to design a control method and a drive module for a lifting and shock-absorbing seat base.

[0004] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Summary of the Invention

[0005] This disclosure provides at least one control method and drive module for a lifting and shock-absorbing seat base.

[0006] In a first aspect, embodiments of this disclosure provide a control method for a drive module for a height-adjustable and shock-absorbing seat base, including:

[0007] The control module acquires the parameters of the seat motor;

[0008] The control module obtains the current tooth flank clearance based on parameters.

[0009] The wear amount is obtained by the control module based on the current tooth flank clearance;

[0010] The control module obtains the corresponding number of pulses based on the amount of wear, and controls the number of rotations of the seat motor output shaft based on the number of pulses.

[0011] In one optional implementation, the method of obtaining the current tooth flank clearance by the control module according to parameters includes:

[0012] The current tooth flank clearance is:

[0013]

[0014] Where B is the current tooth flank clearance; B design Design the tooth backlash in the parameters of the seat motor; K ct is the reference wear coefficient; N is the real-time load torque of the seat motor in the parameters of the seat motor; t is the cumulative running time of the seat motor in the parameters of the seat motor; H is the surface hardness of the gear in the parameters of the seat motor; z is the number of teeth of the gear in the parameters of the seat motor; m is the gear module in the parameters of the seat motor; ΔT is the temperature difference between the current operating temperature and the room temperature in the parameters of the seat motor.

[0015] In one optional implementation, the method of obtaining the wear amount based on the current tooth flank clearance via the control module includes:

[0016] The control module obtains the average tooth flank clearance based on the current tooth flank clearance:

[0017]

[0018] in, The average tooth flank clearance; N is the number of times the current tooth flank clearance is acquired within a preset time period;

[0019] The control module obtains the wear amount based on the average tooth flank clearance:

[0020]

[0021] Where ΔS is the wear amount; A is the adjustment coefficient related to the gear pressure angle and tooth backlash.

[0022] In one optional implementation, the method of obtaining the corresponding number of pulses based on the wear amount by the control module includes:

[0023]

[0024] Where P is the actual number of pulses, i.e., the number of pulses corresponding to the current seat motor adjustment; P theory Calibrate the pulse count for the seat motor;

[0025] After acquiring the actual number of pulses, the control module controls the number of rotations of the seat motor output shaft based on the actual number of pulses.

[0026] In one optional implementation, the parameters of the seat motor include: design tooth backlash, real-time load torque of the seat motor, cumulative running time of the seat motor, temperature difference between the current operating temperature and room temperature, surface hardness of the gear, number of gear teeth, and gear module.

[0027] Secondly, embodiments of this disclosure also provide a drive system for a height-adjustable and shock-absorbing seat base, comprising:

[0028] The acquisition module is configured to acquire parameters of the seat motor;

[0029] The clearance acquisition module is configured to acquire the current tooth flank clearance based on parameters;

[0030] A wear acquisition module is configured to acquire the amount of wear based on the current tooth flank clearance.

[0031] The pulse acquisition module is configured to acquire the corresponding number of pulses based on the amount of wear.

[0032] Thirdly, embodiments of this disclosure also provide a computer-readable storage medium that is not transiently readable, having stored thereon a computer program / instruction, characterized in that, when the computer program / instruction is executed by a processor, it implements the steps of the control method for the drive module of the lifting and shock-absorbing seat base described above.

[0033] Fourthly, embodiments of this disclosure also provide a program product containing instructions that, when executed by a device, cause the device to perform the steps of the control method for the drive module of the lifting and shock-absorbing seat base described above.

[0034] Fifthly, embodiments of this disclosure also provide a drive module for a height-adjustable and shock-absorbing seat base, comprising:

[0035] A control module, and a seat motor electrically connected to the control module;

[0036] The seat motor is connected to the car seat via a gear transmission assembly;

[0037] The control module is configured to control the seat motor using the control method of the drive module for the lifting and shock-absorbing seat base described above, so as to move the car seat through the seat motor.

[0038] In one alternative embodiment, a screw section is provided on the output shaft of the seat motor, the screw section meshing with a gear in the transmission assembly, the gear being connected to a drive shaft;

[0039] The drive shaft is connected to the car seat;

[0040] The control module is configured to control the seat motor to drive the gears to rotate, thereby causing the drive shaft to rotate.

[0041] The beneficial effect of this invention is that the control method of the drive module for the lifting and shock-absorbing seat base includes: the control module acquiring the parameters of the seat motor; the control module acquiring the current gear backlash based on the parameters; the control module acquiring the wear amount based on the current gear backlash; the control module acquiring the corresponding pulse number based on the wear amount, and controlling the number of rotations of the seat motor output shaft based on the pulse number, thereby realizing the real-time adjustment of the pulse number of the seat motor according to the current wear amount of the gear, making the car seat adjustment more precise, and the car seat can be moved to the required position more accurately.

[0042] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0043] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0044] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0045] Figure 1 A flowchart illustrating a control method for a drive module for a height-adjustable and shock-absorbing seat base provided in this embodiment of the present disclosure;

[0046] Figure 2 A schematic block diagram of a drive module for a height-adjustable and shock-absorbing seat base provided in this embodiment of the present disclosure;

[0047] Figure 3 This is a schematic diagram of the structure of a drive module for a height-adjustable and shock-absorbing seat base provided in an embodiment of this disclosure;

[0048] Figure 4 This is a cross-sectional view of a drive module for a height-adjustable and shock-absorbing seat base provided in an embodiment of this disclosure.

[0049] In the picture:

[0050] 1. Seat motor, 2. Screw section, 3. Gear, 4. Drive shaft, 5. Transmission assembly. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0053] In gear transmission systems, backlash is a tiny clearance reserved during design to compensate for thermal expansion, lubrication requirements, and manufacturing tolerances. When the motor reverses direction, the backlash must be filled before power can be transmitted. To achieve lightweight and low noise, the gears of the seat motors in car seats are usually made of plastic, so gear wear is unavoidable. The inventors discovered that gear wear reduces the backlash. If the backlash increases due to wear, the actual displacement of the motor will lag behind the command value during reversal, leading to the accumulation of position errors.

[0054] The shortcomings of the above solutions are the result of the inventor's practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as the inventor's contribution to this disclosure.

[0055] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0056] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0057] like Figure 1 and Figure 2As shown, at least one disclosed embodiment provides a control method for a drive module for a height-adjustable and shock-absorbing seat base, including: a control module acquiring parameters of a seat motor 1; the control module acquiring the current gear backlash based on the parameters; the control module acquiring the wear amount based on the current gear backlash; the control module acquiring the corresponding pulse number based on the wear amount, and controlling the number of rotations of the output shaft of the seat motor 1 based on the pulse number, thereby realizing real-time adjustment of the pulse number corresponding to the seat motor 1 according to the current wear amount of the gear 3, making the car seat adjustment more precise, and the car seat can be moved to the required position more accurately.

[0058] In this embodiment, the drive module for the lifting and shock-absorbing seat base can be composed of a control module and a seat motor 1, etc. The control module can drive the seat motor 1 to work. The seat motor 1 is connected to the car seat through a transmission component 5. The transmission component 5 can be composed of gears 3. A screw section 2 is provided on the output shaft of the seat motor 1. The screw section 2 meshes with the gear 3 in the transmission component 5. When the screw section 2 rotates, it drives the gear 3 to rotate. The transmission component 5 can also include a drive shaft 4. The drive shaft 4 is connected to a gear 3 in the transmission component 5. When the transmission component 5 rotates, the car seat moves through the drive shaft 4. The drive shaft 4 and the car seat can be connected through a moving mechanism, so that the car seat moves through the moving mechanism during the rotation of the drive shaft 4. The movement of the car seat can be up and down or forward and backward, etc. Existing moving mechanisms that can achieve the required movement can be used in this embodiment.

[0059] In one optional implementation, the method of obtaining the current tooth flank clearance by the control module according to parameters includes: the current tooth flank clearance is:

[0060]

[0061] Where B is the current tooth flank clearance, in meters (m); B design For designing tooth flank clearance, the unit is m; K c The reference wear coefficient is expressed in seconds per meter (s / m). 2 N represents the real-time load torque of seat motor 1, in N·m; t represents the cumulative running time of seat motor 1, in seconds. Each run of seat motor 1 can be recorded in the control module to obtain the cumulative running time; H represents the surface hardness of gear 3, in N / m. 2 z represents the number of teeth on gear 3; m represents the module of gear 3, in meters; ΔT represents the temperature difference between the current operating temperature and the ambient temperature, which is a dimensionless numerical value.

[0062] In this embodiment, the tooth backlash is designed to be the calibration value during the production of gear 3; the real-time load torque of seat motor 1 can be obtained by detecting torque sensors and other sensors installed on seat motor 1; the surface hardness, number of teeth, and module of gear 3 can all be the calibration values ​​when gear 3 leaves the factory; the temperature difference between the current working temperature and the ambient temperature can be obtained by subtracting the data detected by the working temperature sensor installed in seat motor 1 from the data detected by the ambient temperature sensor.

[0063] In one optional implementation, the method for obtaining the wear amount based on the current tooth flank clearance by the control module includes: the control module obtaining the average tooth flank clearance based on the current tooth flank clearance.

[0064]

[0065] in, The average tooth flank clearance is expressed in meters (m); N represents the number of times the current tooth flank clearance is measured within a preset time period.

[0066] The control module obtains the wear amount based on the average tooth flank clearance:

[0067]

[0068] Where ΔS is the wear amount in meters (m); and A is an adjustment coefficient related to the pressure angle and tooth backlash of gear 3.

[0069] In this embodiment, the current tooth flank clearance is acquired once every preset interval within a preset time period. The total number of times the current tooth flank clearance is acquired within this preset time period is N. For example, if a passenger controls the seat to move for 3 seconds during a seat adjustment, the current tooth flank clearance is acquired once every 0.1 seconds within 3 seconds. Then, an average value is obtained based on all the acquired current tooth flank clearances as the average tooth flank clearance.

[0070] In one optional implementation, the method of obtaining the corresponding number of pulses based on the wear amount by the control module includes:

[0071]

[0072] Where P is the actual number of pulses, that is, the number of pulses corresponding to the current adjustment of seat motor 1; P theory The pulse count is calibrated for seat motor 1; after obtaining the actual pulse count, the control module controls the number of rotations of the output shaft of seat motor 1 based on the actual pulse count.

[0073] In this embodiment, the calibration pulse number of the seat motor 1 can be the one calibrated at the factory.

[0074] In this embodiment, the control module controls the seat motor 1 according to the actual number of pulses, so that the seat motor 1 can be accurately controlled and the car seat can be moved precisely, ensuring that the car seat can be moved into place.

[0075] In this embodiment, the reference wear coefficient is 5.0 × 10⁻⁶. -4 The temperature difference between the current operating temperature and the ambient temperature is 10, meaning the current operating temperature is 35 degrees Celsius and the ambient temperature is 25 degrees Celsius. The real-time load torque of seat motor 1 is 20, and the cumulative running time of seat motor 1 is 2.6 × 10⁻⁶. 7 The surface hardness of gear 3 is 1.96 × 10⁻⁶. 9 Gear 3 has 20 teeth and a module of 0.5 × 10⁻⁶. -3 The designed tooth flank clearance is 0.15 × 10. -3 Therefore, according to the above formula, the current tooth flank clearance B is 0.134 × 10⁻⁶. -3 The adjustment factor related to the pressure angle and tooth backlash of gear 3 is 1.1, resulting in a wear amount of 0.0145 × 10⁻⁶. -3 If the rated pulse count of the seat motor is 2000, then the actual pulse count is 2193.

[0076] Specifically, due to gear wear, the backlash on the gear teeth decreases. If the calibrated number of pulses is still used to control the number of motor rotations, the accumulated error will cause the gears to not rotate the calibrated number of rotations after the motor rotates the same number of times, resulting in an error in the seat displacement value. To address this, the motor pulses are corrected based on the acquired wear amount to achieve accurate seat displacement.

[0077] In one optional embodiment, the parameters of the seat motor 1 include: design tooth backlash, real-time load torque of the seat motor 1, cumulative running time of the seat motor 1, temperature difference between the current operating temperature and the ambient temperature, surface hardness of the gear 3, number of teeth of the gear 3, and module of the gear 3.

[0078] At least one other disclosed embodiment also provides a drive system for a height-adjustable and shock-absorbing seat base, comprising: an acquisition module configured to acquire parameters of a seat motor 1; a clearance acquisition module configured to acquire a current tooth flank clearance based on the parameters; a wear acquisition module configured to acquire a wear amount based on the current tooth flank clearance; and a pulse acquisition module configured to acquire a corresponding number of pulses based on the wear amount.

[0079] In this embodiment, each module is a virtual program module used to implement the corresponding functional steps, and these modules can be integrated into the control module.

[0080] At least one other disclosed embodiment also provides a computer-readable storage medium that is not transiently readable, having stored thereon a computer program / instruction, characterized in that, when the computer program / instruction is executed by a processor, it implements the steps of the control method for the drive module of the lifting and shock-absorbing seat base described above.

[0081] At least one other disclosed embodiment also provides a program product containing instructions that, when executed by a device, cause the device to perform the steps of the control method for the drive module for the lifting and shock-absorbing seat base described above.

[0082] like Figure 2 and Figure 3 As shown, at least one other disclosed embodiment also provides a drive module for a height-adjustable and shock-absorbing seat base, including: a control module and a seat motor 1 electrically connected to the control module; the seat motor 1 is connected to a car seat via a gear 3 transmission assembly 5; the control module is configured to control the seat motor 1 using the control method of the above-described drive module for a height-adjustable and shock-absorbing seat base, so as to move the car seat through the seat motor 1.

[0083] like Figure 4 As shown, in one optional embodiment, a screw section 2 is provided on the output shaft of the seat motor 1, the screw section 2 meshes with a gear 3 in the transmission assembly 5, the gear 3 is connected to a drive shaft 4; the drive shaft 4 is connected to the car seat; the control module is configured to control the seat motor 1 to drive the gear 3 to rotate, so that the drive shaft 4 rotates.

[0084] In summary, the control method for the drive module of this height-adjustable and shock-absorbing seat base includes: the control module acquiring the parameters of the seat motor 1; the control module acquiring the current gear backlash based on the parameters; the control module acquiring the wear amount based on the current gear backlash; the control module acquiring the corresponding pulse number based on the wear amount, and controlling the number of rotations of the output shaft of the seat motor 1 based on the pulse number, thereby realizing the real-time adjustment of the pulse number corresponding to the seat motor 1 according to the current wear amount of the gear 3, making the car seat adjustment more precise, and the car seat can be moved to the required position more accurately.

[0085] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0086] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as a second element, component, region, layer, or segment.

[0087] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0088] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A control method for a drive module for a height-adjustable and shock-absorbing seat base, characterized in that, include: The control module acquires the parameters of the seat motor (1); The control module obtains the current tooth flank clearance based on parameters. The wear amount is obtained by the control module based on the current tooth flank clearance; The control module obtains the corresponding number of pulses based on the amount of wear, and controls the number of rotations of the output shaft of the seat motor (1) based on the number of pulses. The method for obtaining the current tooth flank clearance by the control module based on parameters includes: The current tooth flank clearance is: ； in, B This represents the current tooth flank clearance. B design Design the tooth backlash in the parameters of the seat motor (1); K c The reference wear coefficient; N The real-time load torque of the seat motor (1) is one of the parameters of the seat motor (1); t The parameters of the seat motor (1) are the cumulative running time of the seat motor (1); H The surface hardness of gear (3) in the parameters of seat motor (1); z The number of teeth of gear (3) in the parameters of seat motor (1); m The parameter of the gear (3) in the seat motor (1) is the module; ∆ T The temperature difference between the current operating temperature and the ambient temperature in the parameters of the seat motor (1).

2. The control method for the drive module of the lifting and shock-absorbing seat base as described in claim 1, characterized in that: The method for obtaining the wear amount based on the current tooth flank clearance via the control module includes: The control module obtains the average tooth flank clearance based on the current tooth flank clearance: ； in, This represents the average tooth flank clearance. N The number of times the current tooth flank clearance is obtained within a preset time period; The control module obtains the wear amount based on the average tooth flank clearance: ； Where, ∆ S This refers to the amount of wear; A This is an adjustment coefficient related to the pressure angle and tooth backlash of the gear (3).

3. The control method for the drive module of the lifting and shock-absorbing seat base as described in claim 2, characterized in that: The method for obtaining the corresponding pulse number based on the wear amount through the control module includes: ； in, P The actual number of pulses is the number of pulses corresponding to the current adjustment of the seat motor (1); P theory Calibrate the pulse count for the seat motor (1); After obtaining the actual number of pulses, the control module controls the number of rotations of the output shaft of the seat motor (1) based on the actual number of pulses.

4. The control method for the drive module of the lifting and shock-absorbing seat base as described in claim 1, characterized in that: The parameters of the seat motor (1) include: design tooth backlash, real-time load torque of the seat motor (1), cumulative running time of the seat motor (1), temperature difference between the current working temperature and the ambient temperature, surface hardness of the gear (3), number of teeth of the gear (3), and module of the gear (3).

5. A computer-readable storage medium, a non-transitory readable storage medium storing a computer program / instruction thereon, characterized in that, When the computer program / instruction is executed by the processor, it implements the steps of the control method for the drive module of the lifting and shock-absorbing seat base as described in any one of claims 1-4.

6. A program product containing instructions, characterized in that, When the instruction is executed by the device, the device performs the steps of the control method for the drive module for the lifting and shock-absorbing seat base as described in any one of claims 1-4.

7. A drive module for a height-adjustable and shock-absorbing seat base, characterized in that, include: A control module, and a seat motor (1) electrically connected to the control module. The seat motor (1) is connected to the car seat via a gear (3) transmission assembly (5); The control module is configured to control the seat motor (1) using the control method of the drive module for lifting and shock-absorbing seat base as described in any one of claims 1-4, so as to move the car seat by means of the seat motor (1).

8. The drive module for a height-adjustable and shock-absorbing seat base as described in claim 7, characterized in that: The output shaft of the seat motor (1) is provided with a screw section (2), which meshes with a gear (3) in the transmission assembly (5), and the gear (3) is connected to a drive shaft (4). The drive shaft (4) is connected to the car seat; The control module is configured to control the seat motor (1) to drive the gear (3) to rotate, so that the drive shaft (4) rotates.

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