Control method of driving module for lifting and damping seat base and driving module

Abstract

The invention belongs to the technical field of general vehicles, and particularly relates to a movable seat, in particular to a control method of a driving module for a lifting and damping seat base and the driving module.The control method of the driving module for the lifting and damping seat base comprises the steps that a control module obtains parameters of a seat motor; the current backlash is obtained through the control module according to the parameters; the abrasion loss is obtained through the control module according to the current gear backlash; the corresponding pulse number is obtained through the control module according to the abrasion loss, the number of rotation turns of the output shaft of the seat motor is controlled according to the pulse number, and then the pulse number corresponding to the seat motor is adjusted in real time according to the current gear abrasion loss, so that adjustment of the automobile seat is more accurate, and user experience is improved. And the automobile seat can be moved to a required position more accurately.

Description

Technical Field

[0001] The present invention belongs to the general field of vehicle technology, and specifically relates to a movable seat, and more particularly to a control method and a drive module for a lifting and damping seat base. Background Art

[0002] Car seats need to move to adapt to the needs of different passengers. In order to achieve lightweight and low noise, the gears that engage with the seat motors are usually made of plastic. Therefore, gear wear is unavoidable, resulting in deviations in the movement of the car seats.

[0003] Therefore, due to the technical problem of deviation in the movement of the car seat 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 above information disclosed in this background technology section is only used to understand the background technology of the present application concept, and therefore, the above description is not considered to constitute information of the prior art. Summary of the invention

[0005] The disclosed embodiments at least provide a control method and a drive module for a lifting and shock-absorbing seat base.

[0006] In a first aspect, an embodiment of the present disclosure provides a method for controlling a driving module for a lifting and shock-absorbing seat base, comprising:

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

[0008] The current tooth side clearance is obtained according to the parameters through the control module;

[0009] The wear amount is obtained according to the current tooth side clearance by the control module;

[0010] The control module obtains the corresponding pulse number according to the wear amount, and controls the number of rotations of the seat motor output shaft according to the pulse number.

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

[0012] The current backlash is:

[0013]

[0014] Where B is the current tooth side clearance; B design Design the tooth side clearance in the parameters of the seat motor; K cis the benchmark 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 gear teeth 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 working temperature and the normal temperature in the parameters of the seat motor.

[0015] In an optional implementation, the method of obtaining the wear amount according to the current tooth side clearance by the control module includes:

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

[0017]

[0018] in, is the average tooth side clearance; N is the number of times the current tooth side clearance is obtained within the preset time;

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

[0020]

[0021] Among them, ΔS is the wear amount; A is the adjustment coefficient related to the gear pressure angle and tooth side clearance.

[0022] In an optional implementation, the method of obtaining the corresponding pulse number according to the wear amount by the control module includes:

[0023]

[0024] Where P is the actual pulse number, that is, the pulse number corresponding to the current seat motor adjustment; P theory Calibrate the pulse number for the seat motor;

[0025] After obtaining the actual number of pulses, the control module controls the number of rotations of the seat motor output shaft according to the actual number of pulses.

[0026] In an optional embodiment, the parameters of the seat motor include: designed tooth side clearance, real-time load torque of the seat motor, cumulative running time of the seat motor, temperature difference between current working temperature and normal temperature, surface hardness of the gear, number of gear teeth and gear module.

[0027] In a second aspect, the embodiment of the present disclosure further provides a driving system for a lifting and shock-absorbing seat base, comprising:

[0028] An acquisition module, configured to acquire parameters of a seat motor;

[0029] A clearance acquisition module, configured to acquire a current tooth side clearance according to a parameter;

[0030] a wear acquisition module configured to acquire the wear amount according to the current tooth side clearance;

[0031] The pulse acquisition module is configured to acquire the corresponding pulse number according to the wear amount.

[0032] In a third aspect, an embodiment of the present disclosure further provides a computer-readable storage medium, a non-transitory computer-readable storage medium, on which a computer program / instruction is stored, characterized in that when the computer program / instruction is executed by a processor, the steps of the control method of the drive module for the lifting and shock-absorbing seat base are implemented.

[0033] In a fourth aspect, the embodiments of the present disclosure further provide a program product comprising instructions, which, when executed by a device, enable the device to execute the steps of the control method of the driving module for the lifting and shock-absorbing seat base.

[0034] In a fifth aspect, the embodiment of the present disclosure further provides a driving module for a lifting 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 driving module for the lifting and shock-absorbing seat base, so as to move the car seat through the seat motor.

[0038] In an optional embodiment, a screw segment is provided on the output shaft of the seat motor, and the screw segment is meshed with a gear in the transmission assembly, and the gear is 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 gear to rotate so as to rotate the drive shaft.

[0041] The beneficial effect of the present invention is that the control method of the driving module for the lifting and shock-absorbing seat base includes: the control module obtains the parameters of the seat motor; the control module obtains the current tooth side clearance according to the parameters; the control module obtains the wear amount according to the current tooth side clearance; the control module obtains the corresponding pulse number according to the wear amount, and controls the number of rotations of the seat motor output shaft according to the pulse number, thereby realizing real-time adjustment of the pulse number corresponding to the seat motor according to the current gear wear amount, so that the car seat can be adjusted more accurately and the car seat can be moved to the desired position more accurately.

[0042] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0043] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, this article specifically cites preferred embodiments and provides detailed descriptions as follows in conjunction with the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0045] Figure 1 A flow chart of a control method for a driving module for a lifting and shock-absorbing seat base provided in an embodiment of the present disclosure;

[0046] Figure 2 A principle block diagram of a driving module for a lifting and shock-absorbing seat base provided in an embodiment of the present disclosure;

[0047] Figure 3 A schematic diagram of the structure of a driving module for a lifting and shock-absorbing seat base provided in an embodiment of the present disclosure;

[0048] Figure 4 A cross-sectional view of a drive module for a lifting and shock-absorbing seat base provided in an embodiment of the present disclosure.

[0049] In the figure:

[0050] 1 seat motor, 2 screw segment, 3 gear, 4 drive shaft, 5 transmission assembly. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work 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," and the like generally refer to the fact that the particular feature, structure, or characteristic following the phrase may be included in at least one embodiment of the present disclosure. Therefore, a particular feature, structure, or characteristic may be included in more than one embodiment of the present disclosure, so that these phrases do not necessarily refer to the same embodiment. As used herein, the terms "example," "exemplary," and the like 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. On the contrary, the use of the terms "example," "exemplary," and the like is intended to present concepts in a concrete manner.

[0053] In the gear transmission system, the backlash is a tiny gap reserved during the design to compensate for thermal expansion, lubrication requirements and manufacturing tolerances. When the motor is reversing, the backlash must be filled before power can be transmitted. In order to achieve lightweight and low noise, the gears of the seat motors of car seats are usually made of plastic, so gear wear cannot be avoided. The inventors found that gear wear will cause the gear backlash to decrease. If the backlash increases due to wear, the actual displacement will lag behind the command value when the motor is reversing, resulting in accumulated position errors.

[0054] The defects existing in the above solutions are the results obtained by the inventor after practice and careful research. Therefore, the discovery process of the above problems and the solutions proposed by the present invention in this article for the above problems should be the contributions made by the inventor to the present invention during the disclosure process.

[0055] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0056] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments 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 driving module for a lifting and shock-absorbing seat base, including: a control module obtains parameters of a seat motor 1; the control module obtains a current tooth side clearance according to the parameters; the control module obtains the amount of wear according to the current tooth side clearance; the control module obtains a corresponding number of pulses according to the amount of wear, and controls the number of rotations of the output shaft of the seat motor 1 according to the number of pulses, thereby achieving real-time adjustment of the number of pulses corresponding to the seat motor 1 according to the current amount of wear of the gear 3, so that the adjustment of the car seat is more precise, and the car seat can be moved to the desired position more accurately.

[0058] In this embodiment, the driving 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 assembly 5. The transmission assembly 5 can be composed of a gear 3. A screw segment 2 is arranged on the output shaft of the seat motor 1. The screw segment 2 is meshed with the gear 3 in the transmission assembly 5. When the screw segment 2 rotates, the gear 3 is driven to rotate. The transmission assembly 5 can also include a drive shaft 4, which is connected to a gear 3 in the transmission assembly 5. When the transmission assembly 5 rotates, the car seat is moved through the drive shaft 4. The drive shaft 4 and the car seat can be connected through a moving mechanism, so that the drive shaft 4 moves the car seat through the moving mechanism during the rotation process. The movement mode of the car seat can be up and down movement, front and back movement, etc. The existing moving mechanism that can achieve the required movement mode can be adopted in this embodiment.

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

[0060]

[0061] Where B is the current tooth side clearance, in m; B design is the design tooth side clearance, in m; K c is the reference wear coefficient, in s / m 2 ; N is the real-time load torque of the seat motor 1, in N·m; t is the cumulative running time of the seat motor 1, in s. In the control module, each operation of the seat motor 1 can be recorded to obtain the cumulative running time; H is the surface hardness of the gear 3, in N / m 2 ; z is the number of teeth of gear 3; m is the module of gear 3, the unit is m; ΔT is the temperature difference between the current working temperature and the normal temperature, which is the numerical value of the temperature difference and is dimensionless.

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

[0063] In an optional implementation, the method of obtaining the wear amount according to the current tooth side clearance by the control module includes: the control module obtains the average tooth side clearance according to the current tooth side clearance:

[0064]

[0065] in, is the average tooth side clearance, in m; N is the number of times the current tooth side clearance is obtained within the preset time;

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

[0067]

[0068] Wherein, ΔS is the wear amount, in m; A is the adjustment coefficient related to the pressure angle and tooth side clearance of gear 3.

[0069] In this embodiment, the current tooth side clearance is obtained once at a preset interval within a preset time, and the total number of current tooth side clearances obtained within the preset time is N. For example, when a passenger adjusts the seat once, the seat is controlled to move for 3 seconds, so the current tooth side clearance is obtained every 0.1 seconds within 3 seconds, and then an average value is obtained based on all the current tooth side clearances obtained as the average tooth side clearance.

[0070] In an optional implementation, the method of obtaining the corresponding pulse number according to the wear amount by the control module includes:

[0071]

[0072] Wherein, P is the actual pulse number, i.e., the pulse number corresponding to the current adjustment of the seat motor 1; P theory The pulse number of the seat motor 1 is calibrated; after obtaining the actual pulse number, the control module controls the number of rotations of the output shaft of the seat motor 1 according to the actual pulse number.

[0073] In this embodiment, the calibrated pulse number of the seat motor 1 may be calibrated when the seat motor 1 leaves the factory.

[0074] In this embodiment, the control module controls the seat motor 1 according to the actual pulse number, so that the seat motor 1 can be accurately controlled, the car seat can be moved accurately, and it is ensured that the car seat can be moved into place.

[0075] In this embodiment, the reference wear coefficient is 5.0×10 -4 , the temperature difference between the current working temperature and the normal temperature is 10, that is, the current working temperature is 35 degrees Celsius, the normal temperature is 25 degrees Celsius, the real-time load torque of the seat motor 1 is 20, and the cumulative running time of the seat motor 1 is 2.6×10 7 , the surface hardness of gear 3 is 1.96×10 9 , gear 3 teeth number 20, gear 3 module 0.5×10 -3 , the design tooth side clearance is 0.15×10 -3 , then according to the above formula, the current tooth side clearance B is 0.134×10 -3 ; The adjustment coefficient related to the pressure angle and tooth side clearance of gear 3 is 1.1, and the wear amount is 0.0145×10 -3 , the seat motor calibrated pulse number is 2000, then the actual pulse number is 2193.

[0076] Specifically, due to gear wear, the gear tooth side clearance is reduced. If the calibrated number of pulses is still used to control the number of motor rotations, the accumulated error will cause the gear to not follow the calibrated number of rotations after the motor rotates the same number of rotations, which will cause an error in the displacement value of the seat. In this regard, the motor pulses are corrected according to the acquired wear amount to achieve accurate seat displacement.

[0077] In an optional embodiment, the parameters of the seat motor 1 include: designed tooth side clearance, real-time load torque of the seat motor 1, cumulative running time of the seat motor 1, temperature difference between current working temperature and normal temperature, surface hardness of gear 3, number of teeth of gear 3 and module of gear 3.

[0078] At least one other disclosed embodiment also provides a driving system for a lifting and shock-absorbing seat base, including: an acquisition module, which is configured to acquire parameters of the seat motor 1; a clearance acquisition module, which is configured to acquire the current tooth side clearance according to the parameters; a wear acquisition module, which is configured to acquire the wear amount according to the current tooth side clearance; and a pulse acquisition module, which is configured to acquire the corresponding number of pulses according to the wear amount.

[0079] In this embodiment, each module is a virtual program module for implementing 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, a non-transitory readable storage medium, on which a computer program / instruction is stored, characterized in that when the computer program / instruction is executed by a processor, the steps of the control method of the drive module for the lifting and shock-absorbing seat base are implemented.

[0081] At least one other disclosed embodiment also provides a program product including instructions, which, when executed by a device, causes the device to execute 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 driving module for a lifting 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 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 driving module for a lifting and shock-absorbing seat base, so as to move the car seat via the seat motor 1.

[0083] like Figure 4 As shown, in an optional embodiment, a screw segment 2 is provided on the output shaft of the seat motor 1, and the screw segment 2 is engaged with a gear 3 in a transmission assembly 5, and the gear 3 is connected to a drive shaft 4; the drive shaft 4 is connected to the car seat; and 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 of the driving module for the lifting and shock-absorbing seat base includes: the control module obtains the parameters of the seat motor 1; the control module obtains the current tooth side clearance according to the parameters; the control module obtains the wear amount according to the current tooth side clearance; the control module obtains the corresponding pulse number according to the wear amount, and controls the number of rotations of the output shaft of the seat motor 1 according to 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, so that the car seat can be adjusted more accurately and the car seat can be moved to the desired position more accurately.

[0085] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0086] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, terms such as "first", "second" and other numerical terms do not imply an order or sequence when used in this document unless explicitly indicated above. Therefore, without departing from the teachings of the example embodiments, the first element, component, region, layer or section discussed above may be referred to as a second element, component, region, layer or section.

[0087] Spatially relative terms, such as "inside", "outside", "below", "below", "down", "above", "on", etc., may be used herein to facilitate description of the relationship of one element or feature to another element or feature as illustrated in the figure. In addition to the orientation depicted in the figure, 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 turned over, the elements described as "below" or "below" other elements or features will be oriented to be "above" other elements or features. Therefore, the example term "below" can cover the orientation above and below. The device can 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 ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A control method for a driving module for a lifting and shock-absorbing seat base, characterized in that: include: The control module obtains parameters of the seat motor (1); The current tooth side clearance is obtained according to the parameters through the control module; The wear amount is obtained according to the current tooth side clearance by the control module; The control module obtains the corresponding pulse number according to the wear amount, and controls the number of rotations of the output shaft of the seat motor (1) according to the pulse number.

2. The control method of the driving module for the lifting and shock absorbing seat base according to claim 1, characterized in that: The method for obtaining the current tooth side clearance according to the parameters by the control module includes: The current backlash is: Where B is the current tooth side clearance; B design Design the tooth side clearance in the parameters of the seat motor (1); K c is the reference wear coefficient; N is the real-time load torque of the seat motor (1) in the parameters of the seat motor (1); t is the cumulative running time of the seat motor (1) in the parameters of the seat motor (1); H is the surface hardness of the gear (3) in the parameters of the seat motor (1); z is the number of teeth of the gear (3) in the parameters of the seat motor (1); m is the module of the gear (3) in the parameters of the seat motor (1); ΔT is the temperature difference between the current working temperature and the normal temperature in the parameters of the seat motor (1).

3. The control method of the driving module for the lifting and shock absorbing seat base according to claim 2, characterized in that: The method of obtaining the wear amount according to the current tooth side clearance by the control module includes: The control module obtains the average tooth side clearance based on the current tooth side clearance: in, is the average tooth side clearance; N is the number of times the current tooth side clearance is obtained within the preset time; The control module obtains the wear amount based on the average tooth side clearance: Wherein, ΔS is the wear amount; A is the adjustment coefficient related to the pressure angle and tooth side clearance of the gear (3).

4. The control method of the driving module for the lifting and shock absorbing seat base according to claim 3, characterized in that: The method of obtaining the corresponding pulse number according to the wear amount by the control module includes: Wherein, P is the actual pulse number, i.e., the pulse number corresponding to the current adjustment of the seat motor (1); P theory Calibrate the pulse number of 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) according to the actual number of pulses.

5. The control method of the driving module for the lifting and shock absorbing seat base according to claim 1, characterized in that: The parameters of the seat motor (1) include: designed tooth side clearance, real-time load torque of the seat motor (1), accumulated running time of the seat motor (1), temperature difference between current working temperature and normal temperature, surface hardness of the gear (3), number of teeth of the gear (3) and module of the gear (3).

6. A driving system for a lifting and shock-absorbing seat base, characterized in that: include: An acquisition module, which is configured to acquire parameters of a seat motor (1); A clearance acquisition module, configured to acquire a current tooth side clearance according to a parameter; a wear acquisition module configured to acquire the wear amount according to the current tooth side clearance; The pulse acquisition module is configured to acquire the corresponding pulse number according to the wear amount.

7. A computer-readable storage medium is a non-transitory readable storage medium having a computer program / instruction stored thereon, characterized in that: When the computer program / instruction is executed by a processor, the steps of the method for controlling the drive module for the lifting and shock-absorbing seat base described in any one of claims 1 to 5 are implemented.

8. A program product comprising instructions, characterized in that When the instruction is executed by the device, the device executes the steps of the control method for the driving module for the lifting and shock-absorbing seat base as described in any one of claims 1 to 5.

9. A driving module for a lifting 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) by adopting the control method of the driving module for the lifting and shock-absorbing seat base as described in any one of claims 1 to 5, so as to move the car seat through the seat motor (1).

10. The driving module for the lifting and shock absorbing seat base according to claim 9, characterized in that: A screw segment (2) is arranged on the output shaft of the seat motor (1), and the screw segment (2) is meshed with a gear (3) in a 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 as to cause the drive shaft (4) to rotate.

Images