Drive device, seat assembly, and vehicle having the same

Abstract

The present invention discloses a drive device, a seat assembly, and a vehicle equipped with the same. The drive device includes: a housing; a limiting member, a first limiting portion provided on the limiting member; an input gear, an eccentric shaft formed on the end face of the input gear; a planetary gear, a second limiting portion cooperating with the first limiting portion provided on the planetary gear, the planetary gear rotating about the axis of the eccentric shaft under the constraint of the limiting member; an output portion, the output portion rotating coaxially with the input gear; and radially extending reinforcement protrusions and / or reinforcement grooves formed on the outer peripheral surface of the eccentric shaft. The drive device according to the present invention forms a smaller transmission system by providing the input gear, planetary gears, and output portion. The planetary gears are limited by the eccentric shaft and limiting member, thereby improving the locking strength of the drive device and solving the problem of a large size and insufficient locking strength of the reduction gearbox of the lifting motor of the automobile seat.

Description

Technical Field

[0001] The present invention relates to the field of automobiles, and in particular to a driving device, a seat assembly and a vehicle having the same. Background Art

[0002] With the trend towards thinner and lighter car seats, the demand for small-volume lifting motor assemblies in car seat layout design is becoming more and more urgent, and the volume of the lifting motor reducer is one of the key factors affecting the volume of the lifting motor assembly. At present, the lifting motor reducers on the car seat market are mainly planetary carrier output and internal ring gear output. The planetary carrier output type lifting motor reducer is mainly composed of a worm, a worm wheel, a sun gear, an internal ring gear, a planetary gear, a main shaft, a planetary carrier, and an output gear. Compared with the internal ring gear output type lifting motor reducer, this type of reducer does not have advantages in terms of reduction ratio and locking (impact) strength of the same volume, and currently has a low market share; the internal ring gear output type lifting motor reducer is mainly composed of a worm, a worm wheel, an eccentric shaft, a self-lubricating sleeve, a cross shift fork, a planetary gear, a main shaft, and an output gear. Compared with the planetary carrier output type lifting motor reducer, it has advantages in terms of reduction ratio and locking (impact) strength of the same volume, and currently has a high market share.

[0003] In the related art, the lifting motor reducer of the car seat has the problems of large size and insufficient locking strength. The large size of the lifting motor reducer causes the lifting motor assembly to be large, and the car seat is not thin enough. Summary of the Invention

[0004] The present invention aims to address at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a drive device. The drive device according to the present invention utilizes an input gear, planetary gears, and an output unit to form a smaller transmission system. Furthermore, the planetary gears are limited by an eccentric shaft and a stopper, thereby enhancing the locking strength of the drive device. This solves the problem of a large reduction gearbox and insufficient locking strength in lifting motors for car seats.

[0005] The present invention also provides a seat assembly having the driving device.

[0006] The present invention also provides a vehicle having the seat assembly.

[0007] According to the present invention, the drive device for a vehicle seat includes: a shell; a limiting member, which is movably arranged on the shell and is provided with a first limiting portion; an input gear, which is rotatably arranged in the shell and has an eccentric shaft formed on its end face; a planetary gear, which is provided with a second limiting portion that cooperates with the first limiting portion, and the planetary gear rotates around the axis of the eccentric shaft under the constraint of the limiting member; an output portion, which rotates coaxially with the input gear and is formed with an inner ring gear on the output portion, and the planetary gear is meshed with the inner ring gear; wherein a radially extending reinforcement protrusion and / or reinforcement groove is formed on the outer peripheral surface of the eccentric shaft.

[0008] The present invention can limit the rotation of the planetary gear by cooperating with the first limiting part through the second limiting part, thereby ensuring that the overall drive device has good locking performance. By constructing the transmission mode between the planetary gear and the output part as an internal and external meshing transmission, at the same reduction ratio, the volume of the planetary gear and the output part is reduced, the integration is increased, the occupied space is reduced, and the size of the drive device is optimized. The drive device has high reliability and good noise and vibration reduction performance.

[0009] According to one embodiment of the present invention, the reinforcement protrusion and the reinforcement groove are configured in plurality and are arranged at intervals in the circumferential direction of the eccentric shaft.

[0010] According to one embodiment of the present invention, the plurality of reinforcing protrusions are symmetrically arranged with respect to the diameter of the eccentric shaft.

[0011] According to one embodiment of the present invention, the reinforcing protrusion includes: a first reinforcing protrusion, the symmetry axis of the first reinforcing protrusion coincides with the symmetry axis of the eccentric shaft, and at least a portion of the first reinforcing protrusion gradually decreases in thickness in a direction away from the symmetry axis.

[0012] According to one embodiment of the present invention, the reinforcing protrusion also includes: a second reinforcing protrusion and a third reinforcing protrusion, the second reinforcing protrusion and the third reinforcing protrusion are arranged on both sides of the eccentric axis of symmetry, and the thickness of the second reinforcing protrusion and the third reinforcing protrusion gradually increases in the circumferential direction toward the first reinforcing protrusion.

[0013] According to one embodiment of the present invention, the second reinforcement protrusion and the third reinforcement protrusion are both constructed in plural.

[0014] According to one embodiment of the present invention, a plurality of first slides are formed on the limiting member, and a plurality of sliders are formed on the end face of the planetary gear. Each of the slides cooperates with at least one slider. The first slide is configured as the first limiting portion, and the slider is configured as the second limiting portion.

[0015] According to one embodiment of the present invention, two first slideways are provided on the limiting member, and a limiting hole connecting the two first slideways is provided on the limiting member, and the inner peripheral wall of the limiting hole is suitable for cooperating with the eccentric shaft to limit the movement of the eccentric shaft.

[0016] According to one embodiment of the present invention, a lubricating sleeve is provided on at least a portion of the outer circumference of the eccentric shaft.

[0017] According to one embodiment of the present invention, the output part includes: a main body part, a receiving groove is formed at one end of the main body part facing the input gear, and the inner ring gear is provided on the inner wall of the receiving groove; and an output gear part, the output gear part is provided at one end of the main body part away from the input gear.

[0018] According to an embodiment of the present invention, a positioning shaft extending in the axial direction is provided on the bottom wall of the accommodating groove, and a positioning shaft through hole is provided on the eccentric shaft.

[0019] According to one embodiment of the present invention, a limiter track is provided on the housing, the extension direction of the limiter track is perpendicular to the extension direction of the input gear pivot shaft, and the limiter is provided with a limiter foot that cooperates with the limiter track.

[0020] A seat assembly according to the present invention is briefly described below.

[0021] The seat assembly according to the present invention is provided with the driving device described in any one of the above embodiments. Since the seat assembly according to the present invention is provided with the driving device described in any one of the above embodiments, the driving device in the seat assembly has a stronger locking strength, a smaller size, occupies less space, is more convenient for the arrangement of other components in the seat assembly, and the seat assembly is more lightweight, thinner, safer and more reliable.

[0022] A vehicle according to the present invention is briefly described below.

[0023] The vehicle according to the present invention is provided with the seat assembly described in any one of the above embodiments. Since the vehicle according to the present invention is provided with the seat assembly described in any one of the above embodiments, the drive device of the vehicle is smaller in size, has greater locking strength, better impact resistance, the seat assembly is lighter and safer, the vehicle has high reliability and safety, and the user experience is better.

[0024] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0026] Figure 1 is a schematic diagram of a drive device assembly according to an embodiment of the present invention;

[0027] Figure 2 is an exploded view of a driving device according to an embodiment of the present invention;

[0028] Figure 3 is a schematic cross-sectional view of an eccentric shaft according to an embodiment of the present invention;

[0029] Figure 4 is a schematic diagram of the cooperation between the input gear and the lubricating sleeve according to an embodiment of the present invention;

[0030] Figure 5 is a schematic diagram of a limiting member according to an embodiment of the present invention;

[0031] Figure 6 is a schematic diagram of a planetary gear according to an embodiment of the present invention;

[0032] Figure 7 is a schematic diagram of an output unit according to an embodiment of the present invention;

[0033] Figure 8 is a partial structural diagram of a driving device according to an embodiment of the present invention;

[0034] Figure 9 2. It is a schematic diagram of the cooperation among the housing, the limiting member and the planetary gear according to an embodiment of the present invention;

[0035] Figure 10 2 is a schematic diagram of the cooperation between the output portion and the mounting bracket according to an embodiment of the present invention.

[0036] Reference numerals:

[0037] Driving device 1;

[0038] Housing 11, limiting member track 111,

[0039] Limiting member 12, first slide 121, limiting support leg 122,

[0040] Input gear 13, eccentric shaft 131, first reinforcement protrusion 1311, second reinforcement protrusion 1312, third reinforcement protrusion 1313, positioning shaft through hole 1314,

[0041] Planetary gear 14, slider 141,

[0042] Output part 15, main body 151, receiving groove 1511, inner gear ring 1512, output gear part 152, positioning shaft 153,

[0043] Lubrication sleeve 16, input gear thrust washer 17, worm 18, end support sleeve 19, end thrust washer 20, anti-backlash thrust washer 21, anti-backlash rubber ring 22, output lubrication sleeve 23, mounting bracket 24, motor body 25, screw 26. DETAILED DESCRIPTION

[0044] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0045] With the trend towards thinner and lighter car seats, the demand for small-volume lifting motor assemblies in car seat layout design is becoming more and more urgent, and the volume of the lifting motor reducer is one of the key factors affecting the volume of the lifting motor assembly. At present, the lifting motor reducers on the car seat market are mainly planetary carrier output and internal ring gear output. The planetary carrier output type lifting motor reducer is mainly composed of a worm, a worm wheel, a sun gear, an internal ring gear, a planetary gear, a main shaft, a planetary carrier, and an output gear. Compared with the internal ring gear output type lifting motor reducer, this type of reducer does not have advantages in terms of reduction ratio and locking (impact) strength of the same volume, and currently has a low market share; the internal ring gear output type lifting motor reducer is mainly composed of a worm, a worm wheel, an eccentric shaft, a self-lubricating sleeve, a cross shift fork, a planetary gear, a main shaft, and an output gear. Compared with the planetary carrier output type lifting motor reducer, it has advantages in terms of reduction ratio and locking (impact) strength of the same volume, and currently has a high market share.

[0046] In the related art, the lifting motor reducer of the car seat has the problems of large size and insufficient locking strength. The large size of the lifting motor reducer causes the lifting motor assembly to be large, and the car seat is not thin enough.

[0047] Reference below Figures 1-10 A driving device 1 according to an embodiment of the present invention will be described.

[0048] like Figure 1 and Figure 2As shown, the drive device 1 for a vehicle seat according to the present invention includes a housing 11, a stopper 12, and an input gear 13. The housing 11 can be used to mount and support other components of the drive device 1, thereby positioning the other components. Furthermore, the housing 11 protects the other components within the housing 11 from external collisions, thereby protecting the components. The stopper 12 is movably disposed on the housing 11 and is provided with a first stopper. The input gear 13 is rotatably disposed within the housing 11, and an eccentric shaft 131 is formed on the end face of the input gear 13. The eccentric shaft 131 has radially extending reinforcement protrusions and / or reinforcement grooves formed on its outer circumference. Specifically, the eccentric shaft 131 may have only reinforcement protrusions without reinforcement grooves, only reinforcement grooves without reinforcement protrusions, or both reinforcement protrusions and reinforcement grooves.

[0049] The drive device 1 for a vehicle seat according to the present invention further includes a planetary gear 14 and an output unit 15. In the present invention, the planetary gear 14 is provided with a second limiting portion adapted to cooperate with the first limiting portion on the limiting member 12. Constrained by the limiting member 12, the planetary gear 14 rotates about the axis of an eccentric shaft 131. The planetary gear 14 is sleeved around the outer periphery of the eccentric shaft 131, which enables the planetary gear 14 to form a specific displacement during rotation, thereby improving the balance of the gear transmission system, making the gear transmission system more stable, and reducing vibration and noise generated by the drive device 1. In the present invention, the output unit 15 rotates coaxially with the input gear 13, and an inner ring gear 1512 is formed on the output unit 15. The planetary gear 14 can mesh with the inner ring gear 1512, forming a meshing transmission between the planetary gear 14 and the output unit 15, thereby increasing the smoothness and reliability of the transmission between the planetary gear 14 and the output unit 15.

[0050] The present invention can limit the rotation of the planetary gear 14 by cooperating with the first limiting portion through the second limiting portion, thereby ensuring that the overall drive device 1 has good locking performance. By constructing the transmission mode between the planetary gear 14 and the output portion 15 as an internal and external meshing transmission, at the same reduction ratio, the volume of the planetary gear 14 and the output portion 15 is reduced, the integration is increased, the occupied space is reduced, and the volume of the drive device 1 is optimized. The drive device 1 has high reliability and good noise and vibration reduction performance.

[0051] According to one embodiment of the present invention, the reinforcing protrusions and / or reinforcing grooves formed on the outer circumferential surface of the eccentric shaft 131 can be configured as a plurality, and the plurality of reinforcing protrusions and / or reinforcing grooves can be spaced apart in the circumferential direction of the eccentric shaft 131. By providing multiple reinforcing protrusions and / or reinforcing grooves, the planetary gears 14 can rotate eccentrically about the axis of the eccentric shaft 131, thereby achieving a smaller size and higher load capacity of each gear at the same reduction ratio, thereby achieving a smaller size, better impact resistance, and longer life of the drive device 1.

[0052] According to one embodiment of the present invention, the plurality of reinforcing protrusions are symmetrically arranged about the diameter of the eccentric shaft 131. By arranging the plurality of reinforcing protrusions symmetrically about the diameter of the eccentric shaft 131, on the one hand, the eccentric shaft 131 can have a better energy absorption effect, the planetary gear 14 rotating around the axis of the eccentric shaft 131 moves more stably, can withstand greater torque, and the overall impact resistance of the gear transmission system is stronger, and the balance and reliability are improved. On the other hand, by arranging the reinforcing protrusions symmetrically, the difficulty of producing and processing the eccentric shaft 131 can be reduced, saving economic costs.

[0053] According to one embodiment of the present invention, the reinforcement protrusion includes a first reinforcement protrusion 1311. Figure 3 As shown, the axis of symmetry of the first reinforcing protrusion 1311 coincides with the axis of symmetry of the eccentric shaft 131. At least a portion of the first reinforcing protrusion 1311 gradually decreases in thickness in the direction away from the axis of symmetry. Furthermore, the top portion of the first reinforcing protrusion 1311, which faces away from the eccentric shaft 131, is smooth, and the bottom portion of the first reinforcing protrusion 1311, which faces closer to the eccentric shaft 131, has a smooth transition to the outer circumferential surface of the eccentric shaft 131. This prevents wear between components caused by sharp edges and corners, and better protects the components. First reinforcing protrusion 1311 provides good structural strength to the eccentric shaft 131 along its axis of symmetry, thereby improving the transmission performance and impact resistance of the conventional integral gear system.

[0054] According to one embodiment of the present invention, the reinforcing protrusion further includes a second reinforcing protrusion 1312 and a third reinforcing protrusion 1313. In the present invention, the second reinforcing protrusion 1312 and the third reinforcing protrusion 1313 are arranged on both sides of the symmetry axis of the eccentric shaft 131, and the thickness of the second reinforcing protrusion 1312 and the third reinforcing protrusion 1313 gradually increases in the circumferential direction toward the first reinforcing protrusion 1311. Similarly, the second reinforcing protrusion 1312 and the third reinforcing protrusion 1313 enable the eccentric shaft 131 to have good offset points on both sides of the symmetry axis of the eccentric shaft 131, thereby improving the transmission performance of the integral gear traditional system. Furthermore, the first reinforcing protrusion 1311, the second reinforcing protrusion 1312 and the third reinforcing protrusion 1313 enable the eccentric shaft 131 to be formed as follows Figure 3By constructing the eccentric shaft 131 into a "flame-shaped" structure, the eccentric shaft 131 has a better energy absorption effect and a greater buffering effect when impacted, thereby providing a stronger protective effect on the overall gear transmission system.

[0055] According to one embodiment of the present invention, the second reinforcing protrusion 1312 is configured as a plurality, and the third reinforcing protrusion 1313 is also configured as a plurality. The plurality of second reinforcing protrusions 1312 and the third reinforcing protrusions 1313 are symmetrical about the symmetry axis of the eccentric shaft 131. By configuring the second reinforcing protrusion 1312 and the third reinforcing protrusion 1313 as a plurality, multiple offset points are formed on the eccentric shaft 131 on both sides of the symmetry axis of the eccentric shaft 131, thereby improving the transmission performance of the eccentric shaft 131 and enhancing its impact resistance.

[0056] like Figure 1 、 Figure 5 and Figure 6 As shown, according to one embodiment of the present invention, a first slide 121 is formed on the limiting member 12, and the first slide 121 is constructed in plurality. A plurality of sliders 141 are formed on the end surface of the planetary gear 14, wherein each slide cooperates with at least one slider 141, the first slide 121 is configured as the first limiting portion on the limiting member 12, and the slider 141 is configured as the second limiting portion on the planetary gear 14. Since the slider 141 can only move within the first slide 121, the first slide 121 has a limiting effect on the slider 141. Furthermore, since the first slide 121 is provided on the limiting member 12 and the slider 141 is provided on the end surface of the planetary gear 14, the limiting member 12 can limit the movement of the planetary gear 14, thereby achieving a good locking function of the drive device 1, and effectively improving the safety and reliability of the drive device 1.

[0057] According to an embodiment of the present invention, two first slideways 121 are provided on the limiting member 12 , a limiting hole is formed on the limiting member 12 , and the limiting hole connects the two first slideways 121 on the limiting member 12 . The inner circumferential wall of the limiting hole is suitable for cooperating with the eccentric shaft 131 to limit the movement of the eccentric shaft 131. It can be understood that at least a portion of the eccentric shaft 131 passes through the limiting hole, that is, the limiting member 12 is sleeved on the outer circumference of the eccentric shaft 131, and the planetary gear 14 is also sleeved on the outer circumference of the eccentric shaft 131, and the limiting member 12 and the planetary gear 14 are arranged sequentially in the axial direction of the eccentric shaft 131, wherein the slider 141 on the planetary gear 14 moves in the first slideway 121 on the limiting member 12, and the limiting member 12 limits the planetary gear 14. At the same time, since the planetary gear produces relative movement relative to the limiting member 12, the relative movement includes movement along the extension direction of the first slideway 121. Therefore, by setting the limiting hole to limit the displacement of the eccentric shaft 131 in the extension direction perpendicular to the first slideway 121, the limiting hole of the limiting member 12 also forms a limit on the eccentric shaft 131, thereby further increasing the locking strength of the drive device 1.

[0058] According to one embodiment of the present invention, at least part of the outer periphery of the eccentric shaft 131 is provided with a lubricating sleeve 16, that is, the lubricating sleeve 16 is provided between the outer periphery of the eccentric shaft 131 and the inner hole of the planetary gear 14. The lubricating sleeve 16 can be constructed as follows: Figure 2 The non-circular open sleeve shown. By positioning the lubricating sleeve 16 around the outer periphery of the eccentric shaft 131, the lubricating sleeve 16 provides lubrication under normal operating loads. Under impact loads, the eccentric shaft 131 and lubricating sleeve 16 deform and expand due to the impact, increasing the friction between the lubricating sleeve 16 and the inner surface of the planetary gear 14. This prevents the input gear 13 from being damaged by excessive stress and improves the safety and impact resistance of the drive device 1.

[0059] like Figure 1 、 Figure 2 and Figure 7As shown, according to one embodiment of the present invention, the output unit 15 includes a main body 151 and an output gear unit 152. The main body 151 of the present invention has a receiving groove 1511 formed on the end facing the input gear 13. An inner ring gear 1512 is provided on the inner wall of the receiving groove 1511. The inner ring gear 1512 can mesh with the teeth of the planetary gears 14, thereby forming a gear meshing transmission between the planetary gears 14 and the output unit 15. The output gear unit 152 of the present invention is disposed at the end of the main body 151 away from the input gear 13. The output gear unit 152 can be connected to external components. The torque of the internal gear transmission system of the drive device 1 is transmitted to the outside world through the output gear unit 152 to achieve the purpose of outputting torque, thereby realizing the driving function of the drive device 1. By providing the main body 151 and the output gear unit 152, and disposing the output gear unit 152 at the end of the main body 151 away from the input gear 13, the connection between the drive device 1 and external components is more convenient. At the same time, the integration of the planetary gears 14 and the output unit 15 is increased, and the volume of the drive device 1 is reduced.

[0060] According to one embodiment of the present invention, an axially extending positioning shaft 153 is provided on the bottom wall of the receiving groove 1511, and a positioning shaft through hole 1314 is provided on the eccentric shaft 131. Positioning shaft 153 is used to accurately position the various components of the drive device 1. Positioning shaft 153 passes through positioning shaft through hole 1314 on the eccentric shaft 131, thereby positioning the input gear 13 and the planetary gears 14 and enabling coaxial rotation between the output portion 15 and the input gear 13. The end of positioning shaft 153 proximal to the input gear 13 mates with the housing 11. Specifically, a corresponding hole is provided on the housing 11. Grease allows the positioning shaft 153 and the corresponding hole in the housing 11 to form a friction fit, further ensuring accurate positioning and normal transmission of the gear system.

[0061] It should be noted that in another embodiment of the present invention, a first through hole is formed on the bottom wall of the accommodating groove 1511, and the first through hole passes through the main body 151, a second through hole is formed on the output gear part 152, and the second through hole passes through the output gear part 152, the positioning shaft 153 is interference fit with the first through hole and the second through hole to achieve a fixed connection between the positioning shaft 153 and the output part 15, and the installation is convenient and easy.

[0062] According to one embodiment of the present invention, a limiter track 111 is provided on the housing 11. The extension direction of the limiter track 111 is perpendicular to the extension direction of the pivot axis of the input gear 13. A limiter leg 122 is provided on the limiter 12. The limiter leg 122 is configured to extend away from the limiter 12 on the limiter 12, and the limiter leg 122 can cooperate with the limiter track 111. By providing the limiter track 111 and the limiter leg 122, the limiter 12 can only move on the housing 11 in a direction perpendicular to the pivot axis of the input gear 13, and the limiter leg 122 can only move within the limiter track 111. The limiter leg 122 of the limiter 12 and the limiter track 111 of the housing 11 are frictionally engaged under the action of grease. The first slideway 121 of the limiter 12 and the slider 141 of the planetary gear 14 are frictionally engaged under the action of grease, thereby limiting the rotation of the planetary gear 14, thereby improving the locking strength performance of the drive device 1. In addition, in a specific embodiment of the present invention, the number of the limiting legs 122 on the limiting member 12 is three, and correspondingly, the number of the limiting member rails 111 on the housing 11 is three.

[0063] like Figure 1 and Figure 2 As shown, in one embodiment of the present invention, the drive device 1 according to the present invention further includes an input gear thrust washer 17, a worm 18, an end support sleeve 19, an end thrust washer 20, an anti-backlash thrust washer 21, an anti-backlash rubber ring 22, an output lubricating sleeve 23, and a mounting bracket 24. The input gear thrust washer 17 in the present invention is suitable for cooperating with the end face of the input gear 13 close to the housing 11, and combined with grease, it plays a role in reducing the friction between the input gear 13 and the housing 11; the worm 18 in the present invention is engaged with the input gear 13 to transmit the power of the motor body 25 from the worm 18 to the input gear 13; the end support sleeve 19 in the present invention is suitable for carrying the output shaft on the motor body 25, and plays a self-lubricating role in the output shaft; the end thrust washer 20 in the present invention is suitable for axially limiting the output shaft on the motor body 25, and the end thrust washer 20 has lubrication and buffering noise reduction effects on the shaft end of the output shaft; the output part lubricating sleeve 23 in the present invention is arranged between the output gear part 152 and the mounting bracket 24, and the output part lubricating sleeve 23 is used to carry the output gear part 152 and play a lubricating role; the mounting bracket 24 in the present invention can be fixed to the housing 11 by screws 26. The mounting bracket 24 can not only carry the output part lubricating sleeve 23 and encapsulate the overall drive device 1, but also be used to be fixed to external parts.

[0064] The anti-backlash thrust washer 21 and the anti-backlash rubber ring 22 in the present invention are arranged between the eccentric shaft 131 and the output part 15, and the anti-backlash thrust washer 21 and the anti-backlash rubber ring 22 are both sleeved on the positioning shaft 153, wherein one side end face of the anti-backlash rubber ring 22 in the thickness direction is fitted with the bottom wall of the accommodating groove 1511 of the main body 151, and the other side end face of the anti-backlash rubber ring 22 in the thickness direction is fitted with one side end face of the anti-backlash thrust washer 21 in the thickness direction. The anti-backlash rubber ring 22 can be compressed and deformed between the anti-backlash thrust washer 21 and the accommodating groove 1511 of the main body 151, thereby playing a role in eliminating axial clearance; the other side end face of the anti-backlash thrust washer 21 in the thickness direction is fitted with the free end face of the eccentric shaft 131, and the anti-backlash thrust washer 21 cooperates with grease to reduce the friction of the free end face of the eccentric shaft 131, thereby extending the service life of the eccentric shaft 131.

[0065] A seat assembly according to the present invention is briefly described below.

[0066] The seat assembly according to the present invention is provided with the drive device 1 described in any one of the above embodiments. Since the seat assembly according to the present invention is provided with the drive device 1 described in any one of the above embodiments, the drive device 1 in the seat assembly has a stronger locking strength, a smaller size, occupies less space, is more convenient for the arrangement of other components in the seat assembly, and the seat assembly is more lightweight, thinner, safer and more reliable.

[0067] A vehicle according to the present invention is briefly described below.

[0068] The vehicle according to the present invention is provided with the seat assembly described in any one of the above embodiments. Since the vehicle according to the present invention is provided with the seat assembly described in any one of the above embodiments, the drive device 1 of the vehicle is smaller in size, has greater locking strength, and better impact resistance. The seat assembly is lightweight and safe, the vehicle has high reliability and safety, and the user experience is better.

[0069] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are 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 should not be understood as limiting the present invention.

[0070] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0071] In the description of the present invention, "plurality" means two or more.

[0072] In the description of the present invention, a first feature being “on” or “under” a second feature may include the first and second features being in direct contact with each other, or the first and second features not being in direct contact with each other but being in contact with each other via another feature therebetween.

[0073] In the description of the present invention, “on”, “above” and “above” a first feature of a second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0074] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0075] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A driving device (1) for a vehicle seat, characterized in that: include: housing (11); A limiting member (12), the limiting member (12) being movably arranged on the housing (11), and the limiting member (12) being provided with a first limiting portion; An input gear (13), the input gear (13) being rotatably disposed in the housing (11) and having an eccentric shaft (131) formed on an end surface thereof; A planetary gear (14), wherein the planetary gear (14) is provided with a second limiting portion cooperating with the first limiting portion, and the planetary gear (14) rotates around the axis of the eccentric shaft (131) under the constraint of the limiting member (12); An output portion (15), the output portion (15) rotates coaxially with the input gear (13), an inner ring gear (1512) is formed on the output portion (15), and the planetary gear (14) meshes with the inner ring gear (1512); wherein A reinforcement protrusion and / or reinforcement groove extending in the radial direction is formed on the outer peripheral surface of the eccentric shaft (131); The reinforcement protrusions and the reinforcement grooves are constructed in plurality and are arranged at intervals in the circumferential direction of the eccentric shaft (131); The plurality of reinforcing protrusions are symmetrically arranged about the diameter of the eccentric shaft (131); The reinforcing protrusion comprises: a first reinforcing protrusion (1311), the symmetry axis of the first reinforcing protrusion (1311) coincides with the symmetry axis of the eccentric shaft (131), and at least a portion of the first reinforcing protrusion (1311) gradually decreases in thickness in a direction away from the symmetry axis; The reinforcement protrusion further comprises: a second reinforcing protrusion (1312) and a third reinforcing protrusion (1313), wherein the second reinforcing protrusion (1312) and the third reinforcing protrusion (1313) are arranged on both sides of the symmetry axis of the eccentric shaft (131), and the thickness of the second reinforcing protrusion (1312) and the third reinforcing protrusion (1313) gradually increases in a circumferential direction toward the first reinforcing protrusion (1311); A limit member track (111) is provided on the housing (11), and an extension direction of the limit member track (111) is perpendicular to an extension direction of the pivot axis of the input gear (13).

2. The drive device (1) for a vehicle seat according to claim 1, characterized in that The second reinforcement protrusion (1312) and the third reinforcement protrusion (1313) are both constructed in multiple numbers.

3. The drive device (1) for a vehicle seat according to claim 1, characterized in that A plurality of first slideways (121) are formed on the limiting member (12), and a plurality of sliders (141) are formed on the end surface of the planetary gear (14), each of the slideways cooperates with at least one slider (141), the first slideway (121) is configured as the first limiting portion, and the slider (141) is configured as the second limiting portion.

4. The drive device (1) for a vehicle seat according to claim 3, characterized in that The limiting member (12) is provided with two first slideways (121), and the limiting member (12) is provided with a limiting hole for connecting the two first slideways (121), and the inner peripheral wall of the limiting hole is suitable for cooperating with the eccentric shaft (131) to limit the movement of the eccentric shaft (131).

5. The drive device (1) for a vehicle seat according to claim 4, characterized in that A lubricating sleeve (16) is provided on at least part of the outer periphery of the eccentric shaft (131).

6. The drive device (1) for a vehicle seat according to claim 1, characterized in that The output unit (15) includes: A main body (151), wherein an accommodating groove (1511) is formed at one end of the main body (151) facing the input gear (13), and the inner gear ring (1512) is provided on the inner wall of the accommodating groove (1511); An output gear portion (152) is provided at an end of the main body portion (151) away from the input gear (13).

7. The drive device (1) for a vehicle seat according to claim 6, characterized in that A positioning shaft (153) extending in the axial direction is provided on the bottom wall of the accommodating groove (1511), and a positioning shaft through hole (1314) is provided on the eccentric shaft (131).

8. The drive device (1) for a vehicle seat according to claim 1, characterized in that The limiting member (12) is provided with a limiting support foot (122) that cooperates with the limiting member track (111).

9. A seat assembly, characterized in that: A drive device (1) comprising the drive device according to any one of claims 1 to 8.

10. A vehicle, characterized in that: The seat assembly includes the seat assembly described in claim 9.

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