WO2018133488A1 - 用于调节座椅靠背角度的传动装置和包括传动装置的车辆 - Google Patents

用于调节座椅靠背角度的传动装置和包括传动装置的车辆 Download PDF

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Publication number
WO2018133488A1
WO2018133488A1 PCT/CN2017/108338 CN2017108338W WO2018133488A1 WO 2018133488 A1 WO2018133488 A1 WO 2018133488A1 CN 2017108338 W CN2017108338 W CN 2017108338W WO 2018133488 A1 WO2018133488 A1 WO 2018133488A1
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Prior art keywords
stage worm
transmission
gear
worm gear
stage
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PCT/CN2017/108338
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English (en)
French (fr)
Inventor
宋仲明
岑文安
冯臣
杜旭
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广东肇庆爱龙威机电有限公司
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Publication of WO2018133488A1 publication Critical patent/WO2018133488A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/22—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable
    • B60N2/2231—Worm and worm gear articulations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/20—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being tiltable, e.g. to permit easy access
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/22—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable

Definitions

  • the present invention relates to the field of transmissions, and more particularly to a transmission for adjusting the angle of a seat back and a vehicle including the transmission.
  • a seat angle adjusting motor assembly is known, for example, from the patent document CN202309371U, which comprises a pair of meshing worm gears and an output gear associated with the worm wheel, wherein the output gear is mounted with a seat adjusting shaft to achieve a pair Adjustment of the seat angle.
  • a car seat angle electric adjuster is known. The power source drives the composite gear to rotate around the fixed gear via the worm gear transmission mechanism, and finally realizes effective adjustment of the seat angle by the rotation of the composite gear.
  • the final transmission stage in the transmission of the above-mentioned adjustment assembly adopts gear meshing, the degree of coincidence of the gear is low, so that the driver is prone to runout during operation, resulting in poor smoothness of the transmission and affecting the performance of the driver.
  • the existing drives for angle adjustment usually contain a large number of transmission components, resulting in a large volume and a large weight of the drive, which is contrary to the trend of miniaturization and weight reduction in the industry.
  • the present invention has been made in view of such a background, and is intended to provide a transmission for adjusting the angle of a seat back, which has a small footprint, a compact transmission structure, a smooth transmission, and a low motor torque requirement.
  • a first aspect of the present invention provides a transmission for adjusting a seat back angle, comprising: a first stage worm gear mechanism including: a first stage worm gear and a first stage worm engaged;
  • the stage worm is adapted to be coupled to the power output shaft of the power source;
  • the second stage worm gear mechanism includes: a second stage worm gear and a second stage worm that are engaged;
  • the second stage worm is the same as the first stage worm wheel a shaft coupled to the drive shaft, the first end of which is disposed in the central bore of the second stage worm gear and coupled to the second stage worm wheel in a rotationally fixed manner; and a mounting plate supported on the seat side support,
  • a central hole of the mounting plate is for receiving a second end of the drive shaft, the mounting plate is driven by the drive shaft, and the mounting plate is provided with a mounting hole for mounting the back frame.
  • the second stage worm wheel has a first stop surface in the central hole, and the portion of the drive shaft located in the central hole of the second stage worm wheel has the first stop The surface matches the second stop surface.
  • the drive shaft is coupled to the central bore of the second stage worm gear by a spline.
  • a planetary transmission gear train is disposed between the drive shaft and the mounting plate, the planetary transmission gear train comprising: a sun gear, an inner ring gear, a planet gear and a planet carrier; the planet carrier and the mounting
  • the plate is integrally formed or attached together, the sun gear is mounted on the second end of the drive shaft and coaxially interlocked with the drive shaft; the inner ring gear is formed on the seat side support;
  • the planet gear is mounted on the planet carrier and simultaneously meshes with the sun gear and the ring gear.
  • the first stage worm gear mechanism and the second stage worm gear mechanism are spatially staggered at 90° such that the axis of the first stage worm and the axis of the second stage worm wheel are spatially Orthogonal to each other.
  • the first stage worm gear drive is a multi-head worm gear drive and/or
  • the second stage worm gear transmission mechanism is a single head worm gear transmission.
  • the lead angle of the second stage worm is maintained below 7.83 and/or the number of heads of the first stage worm is two or more.
  • the first stage worm and the second stage worm are made of metal, and the first stage worm wheel and the second stage worm wheel are made of a plastic material.
  • the power source is a motor.
  • Another aspect of the present invention provides a vehicle in which the above-described transmission for adjusting the angle of the seat back is provided.
  • FIG. 1 is a schematic view showing the assembly of a transmission device mounted in a seat back frame according to an embodiment of the present invention
  • FIG. 2 is a schematic perspective view showing an arrangement relationship between a first stage worm gear mechanism and a second stage worm gear mechanism of a transmission according to an embodiment of the present invention
  • FIG 3 is a plan view showing the arrangement relationship of the first stage worm gear mechanism and the second stage worm gear mechanism of the transmission device according to an embodiment of the present invention.
  • FIG. 4 is a partial detailed schematic view of a transmission in accordance with an embodiment of the present invention, wherein the back frame is only partially shown and the housing assembly is partially cut away for clarity.
  • a transmission 2 for use in an angle adjustment drive 1 in accordance with an embodiment of the present invention is illustrated to effect adjustment of the angular position of the seat back.
  • the angle adjustment drive 1 can be mounted at one side of the bottom of the back frame 8 due to its compact structure and completely housed in a mounting chamber (not shown) formed in the back frame 8, and Lateral branch It is supported on the seat side support 11.
  • the transmission 2 for the angle adjustment driver 1 includes a first stage worm gear mechanism and a second stage worm gear transmission, wherein the first stage worm gear mechanism includes meshing with each other
  • the first stage worm gear mechanism includes meshing with each other
  • the second stage worm gear mechanism includes a second stage worm gear 5 and a second stage worm 6 that mesh with each other.
  • the first stage worm wheel 3 is overmolded at one end of the second stage worm 6 such that the first stage worm wheel 3 and the second stage worm 6 are formed as a one piece that rotates together along the same axis. .
  • the first stage worm 4 is coupled to a power source, such as a power take-off shaft (not shown) of the motor 12, and then powered by engagement with the first stage worm gear 3 and, in turn, by transmission of the second stage worm 6. Transfer to the second stage worm gear 5.
  • a power source such as a power take-off shaft (not shown) of the motor 12, and then powered by engagement with the first stage worm gear 3 and, in turn, by transmission of the second stage worm 6. Transfer to the second stage worm gear 5.
  • the second stage worm wheel 5 in the transmission according to the embodiment of the present invention and the drive shaft 7 as the seat adjustment shaft are at one end.
  • the coupling is not rotationally rotatable so that power can be transmitted directly to the back frame 8 without the additional transmission stage via the drive shaft to achieve angular adjustment of the seat back.
  • the transmission device for adjusting the angle of the seat back adopts the technical scheme of the two-stage worm gear transmission and the linkage between the drive shaft 7 and the second stage worm gear 5, and cancels the prior art and the worm gear transmission mechanism.
  • the interlocking spur gear transmission mechanism can not only make the transmission space required by the transmission device small, and the structure is more compact, but also can achieve the effect of large transmission ratio, thereby reducing the requirement on the torque of the motor, thereby reducing the volume of the motor. And reduce the weight of the motor.
  • the angular position after the seat back adjustment can be stably maintained.
  • a hole 13 may be defined in the center of the second stage worm wheel 5, and at least one side wall of the square hole 13 forms a first stop surface, and the drive shaft 7 There is a portion that is disposed in the square hole and the portion is provided with a second stop surface that matches the first stop surface.
  • the shape of the portion of the drive shaft 7 that is inserted into the square hole is adapted to the shape of the square hole 13 such that the second stage worm gear 5 rotates to drive the drive shaft 7 together.
  • a center of the second stage worm wheel 5 is provided with a spline hole
  • the drive shaft 7 is a spline shaft
  • the spline hole of the second stage worm wheel 5 and the drive shaft 7 are flowers.
  • the key is coupled to realize the linkage between the drive shaft 7 and the second stage worm gear 5.
  • FIG 4 shows a partial detailed schematic view of a transmission in accordance with an embodiment of the present invention.
  • the back frame is only partially shown, and the box assembly 14 is partially cut away to partially illustrate the worm gear mechanism housed within the box assembly 14.
  • FIG. 10 A preferred configuration of the drive shaft 7 to rotate the back frame 8 is shown in FIG. Specifically, one end of the drive shaft 7 opposite to the second stage worm wheel 5 is supported by the rotatable mounting plate 10, and the mounting plate 10 is driven by the drive shaft 7, and the back frame 8 is fastened by the fastening device 9. To the mounting plate 10, the rotation of the drive shaft 7 can be transmitted to the back frame 8 through the mounting plate 4.
  • a planetary transmission train is disposed between the mounting plate 10 and the drive shaft 7.
  • the planetary transmission gear train includes a sun gear, an inner ring gear, a planetary gear and a planet carrier, wherein the sun gear is coaxially coupled with the drive shaft 7, and the inner ring gear is formed in the fixed seat side support 11.
  • the planet gears are simultaneously meshed with the sun gear and the ring gear and fixed to the planet carrier, and the mounting plate 10 can be integrally formed or attached to the planet carrier.
  • the driving shaft 7 drives the sun gear to rotate, and the planetary carrier and the mounting plate 10 are rotated by the meshing planetary gears, thereby driving the back frame 8 to rotate together, so that the seat back can be appropriately adjusted according to the needs of the seat user. angle.
  • the fastening device 8 is preferably a bolt. However, it should be understood that any other device known in the art to be suitable for fastening is also within the scope of the claimed invention.
  • the above planetary transmission train wheel may not be provided.
  • the mounting plate 10 is rotatably supported by the seat-side support 11 by bearings, and the drive shaft 7 is mounted into the center hole of the mounting plate 10 and coupled to the mounting plate 10 in a rotationally fixed manner, and passes through the drive shaft 7 The rotation directly drives the mounting plate 10 to drive the rotation of the back frame 8.
  • the first stage worm gear mechanism and the second stage worm gear mechanism are spatially staggered at 90[deg.], ie arranged such that the first stage The axis A of the worm 4 and the axis B of the second stage worm gear 5 are spatially orthogonal to each other, so that the installation space required for the transmission structure can be minimized.
  • the second-stage worm gear transmission mechanism preferably uses a single-head worm gear transmission, so that the gear coincidence degree can be improved while maintaining the self-locking function required by the driver, thereby enhancing the gear meshing strength.
  • the second stage worm gear ratio is designed to be about 46, and the lead angle of the second stage worm 6 of the second stage worm gear drive is designed to remain below 7.83, but as much as possible
  • the transmission efficiency of the second-stage worm gear transmission mechanism is improved under the premise of the self-locking capability of the worm gear.
  • the first stage worm 4 of the first stage worm gear transmission is coupled with the power output shaft of the motor 12 as a power source, and the increase or decrease of the seat back angle is realized by the forward and reverse rotation of the motor. control.
  • the angle of the seat back is adjusted from -10° to +80°.
  • the first stage worm 4 and the second stage worm 6 are preferably made of a metal material, and the first stage worm wheel 3 and the second stage worm wheel 5 are made of a plastic material. Furthermore, the housing assembly 14 for accommodating the two-stage worm gearing is also preferably integrally injection molded from a plastic material.
  • the worm gear has the advantages of large transmission ratio, good self-locking performance and low running noise, and is especially suitable for the relevant driving device of the automobile seat.
  • the various beatings caused by the low degree of coincidence of the gears during operation are better limited.
  • the noise reduction is achieved very well, and at the same time the operational stability of the system is increased, so that the comfort of the passenger, in particular in adjusting the angular position of the seat back, is greatly increased.

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  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Gear Transmission (AREA)

Abstract

一种用于调节座椅靠背角度的传动装置（2），包括：第一级蜗轮传动机构，其包括：相啮合的第一级蜗轮（3）和第一级蜗杆（4），第一级蜗杆（4）适于与动力源（12）的动力输出轴联接；第二级蜗轮传动机构，其包括：相啮合的第二级蜗轮（5）和第二级蜗杆（6），所述第二级蜗杆（6）与所述第一级蜗轮（3）同轴联接；驱动轴（7），其第一端穿设在所述第二级蜗轮（5）的中心孔（13）中并与所述第二级蜗轮（5）不可相对转动地联接；和支承于座椅侧支座（11）上的可转动的安装板（10），所述安装板（10）的中心孔用于接收所述驱动轴（7）的第二端，所述安装板（10）由所述驱动轴（7）驱动，且所述安装板（10）上设置有用于安装靠背框架（8）的安装孔。还涉及一种包括上述传动装置（2）的车辆。该传动装置（2）显著地减小了整个传动装置的重量和尺寸。

Description

用于调节座椅靠背角度的传动装置和包括传动装置的车辆 技术领域
本发明涉及传动装置领域，更具体地涉及一种用于调节座椅靠背角度的传动装置和包括该传动装置的车辆。
背景技术
通常，人们在就坐于汽车座椅上时需要针对自身情况选择最适宜的座椅位置，该座椅位置包括高度位置和角度位置。特别是，目前存在针对座椅靠背的角度位置调节的驱动器，该驱动器通常包括两级或多级传动机构，其中，在第一级传动机构采用蜗轮蜗杆啮合的情况下，第二级或最终级传动机构大多采用齿轮啮合、尤其是直齿轮啮合以实现将动力传递至座椅调节轴。
例如，由专利文献CN202309371U已知一种座椅角度调节电机组件，该电机组件包括一对啮合传动的蜗轮蜗杆以及与蜗轮联动的输出齿轮，其中，输出齿轮上安装有座椅调节轴以实现对座椅角度的调节。另外，根据专利文献CN2656204Y已知一种汽车座椅角度电动调节器，动力源经由蜗轮蜗杆传动机构带动复合齿轮绕固定齿轮转动，并最终通过复合齿轮的转动实现对座椅角度的有效调节。
然而，由于上述调节组件的传动装置中的最终传动级采用齿轮啮合，齿轮的重合度较低，使得驱动器在工作期间容易出现跳动，导致传动的平稳性较差，影响驱动器的工作性能。另外，现有的这些用于角度调节的驱动器通常包含较多的传动部件，导致驱动器体积大、重量大，这与行业内的小型化、轻量化的趋势背道而驰。
因此，需要提出一种改进的用于角度调节驱动器中的传动装置，使得一方面尽可能地减小对齿轮箱的空间需求，且另一方面增强齿轮传动的抗震动性和抗冲击性、降低由传动部件引起的振动，从而降低驱动器运行时 的噪音。
发明内容
因此，本发明就是基于这样的背景而提出的，且旨在提供一种占用空间小、传动结构紧凑、传动平稳且对电机扭矩的要求低的用于调节座椅靠背角度的传动装置。
本发明的第一方面提供了一种用于调节座椅靠背角度的传动装置，包括：第一级蜗轮传动机构，其包括：相啮合的第一级蜗轮和第一级蜗杆；所述第一级蜗杆适于与动力源的动力输出轴联接；第二级蜗轮传动机构，其包括：相啮合的第二级蜗轮和第二级蜗杆；所述第二级蜗杆与所述第一级蜗轮同轴联接；驱动轴，其第一端穿设在所述第二级蜗轮的中心孔中并与所述第二级蜗轮不可相对转动地联接；和支承于座椅侧支座上的安装板，所述安装板的中心孔用于接收所述驱动轴的第二端，所述安装板由所述驱动轴驱动，且所述安装板上设置有用于安装靠背框架的安装孔。
根据本发明一有利实施例，所述第二级蜗轮的中心孔内具有第一止动面，所述驱动轴位于所述第二级蜗轮的中心孔内的部分具有与所述第一止动面相匹配的第二止动面。
根据本发明一替代实施例，所述驱动轴与所述第二级蜗轮的中心孔通过花键联接。
有利地，所述驱动轴与所述安装板之间设置有行星传动轮系，所述行星传动轮系包括：太阳轮、内齿圈、行星轮和行星架；所述行星架与所述安装板一体成型或者附接在一起，所述太阳轮安装于所述驱动轴的第二端并与所述驱动轴同轴联动；所述内齿圈形成于所述座椅侧支座上；所述行星轮安装于所述行星架上，并同时与所述太阳轮和所述内齿圈啮合。
有利地，所述第一级蜗轮传动机构和所述第二级蜗轮传动机构在空间上以90°交错布置，使得所述第一级蜗杆的轴线与所述第二级蜗轮的轴线在空间上彼此正交。
有利地，所述第一级蜗轮传动机构为多头蜗轮蜗杆传动，并且/或者， 所述第二级蜗轮传动机构为单头蜗轮蜗杆传动。优选地，所述第二级蜗杆的导程角保持在7.83°以下，并且/或者，所述第一级蜗杆的头数为两头或三头以上。所述第一级蜗杆和第二级蜗杆采用金属制成，所述第一级蜗轮和第二级蜗轮采用塑料材料制成。有利地，所述动力源为电机。
本发明的另一方面提供了一种车辆，所述车辆的座椅中设置有上述用于调节座椅靠背角度的传动装置。
通过采用根据本发明的传动装置，可以最大可能地降低其对安装空间以及对电机输入转矩的需求，使得显著地减小了整个传动装置的重量和尺寸。
附图说明
通过以下参照附图的描述，本发明的上述和其他特征和优点将变得更加容易理解，附图中：
图1是根据本发明实施例的传动装置安装在座椅靠背框架中的装配示意图；
图2是根据本发明实施例的传动装置的第一级蜗轮传动机构和第二级蜗轮传动机构的布置关系透视示意图；以及
图3是根据本发明实施例的传动装置的第一级蜗轮传动机构和第二级蜗轮传动机构的布置关系平面示意图。
图4是根据本发明实施例的传动装置的局部详细示意图，其中，为了清楚性，靠背框架仅部分示出且箱体组件被部分地剖开。
具体实施方式
下面结合附图和具体实施例进一步详细地说明本发明。
参照图1和4，示出了根据本发明实施例的用于角度调节驱动器1中的传动装置2，以实现对座椅靠背的角度位置的调节。如图1所示，角度调节驱动器1由于其紧凑的结构而可安装在靠背框架8的底部的一侧处且完全地收纳在靠背框架8内形成的安装腔室(未示出)中，并且侧向地支 承在座椅侧支座11上。
更具体地，如图2所示，所述用于角度调节驱动器1中的传动装置2包括第一级蜗轮传动机构和第二级蜗轮传动机构，其中，第一级蜗轮传动机构包括彼此啮合的第一级蜗轮3和第一级蜗杆4，第二级蜗轮传动机构包括彼此啮合的第二级蜗轮5和第二级蜗杆6。优选地，在所述第二级蜗杆6的一端处包覆成型有所述第一级蜗轮3，使得所述第一级蜗轮3和第二级蜗杆6形成为绕同一轴线一同转动的一体件。
所述第一级蜗杆4与动力源、例如电机12的动力输出轴(未示出)联接，然后通过与第一级蜗轮3的啮合传动并进而借助于第二级蜗杆6的传动，将动力传递至第二级蜗轮5。
应注意的是，不同于现有技术中的用于调节座椅靠背角度的传动装置，根据本发明实施例的传动装置中的第二级蜗轮5与作为座椅调节轴的驱动轴7在一端处不可相对转动地联接，从而使得可以通过该驱动轴不经由另外的传动级而将动力直接传递至靠背框架8，以实现对座椅靠背的角度调节。
现有技术的常规角度调节驱动器中，动力在被传递至靠背框架之前还被传递通过存在于蜗轮蜗杆传动级之后的其它直齿轮传动级，因而存在因齿轮啮合引致的齿轮的重合度低、传动平稳性差、以及占用空间大等问题。然而，本发明实施例提供的用于调节座椅靠背角度的传动装置，采用两级蜗轮蜗杆传动且驱动轴7与第二级蜗轮5联动的技术方案，取消了现有技术中与蜗轮传动机构联动的直齿轮传动机构，除了可以使得该传动装置所需占用的结构空间小、结构更加紧凑外，还能够取得大传动比的效果，从而使得对电机扭矩的要求降低，因而减小电机的体积和减轻电机的重量。另外，利用蜗轮蜗杆传动结构的自锁性，可以使座椅靠背调节后的角度位置能够被稳定地保持。
实现第二级蜗轮5与驱动轴7之间不可相对转动的联接的方式有很多种。例如，在图3示出的一种实施方式中，可以在所述第二级蜗轮5的中央开设有一方孔13，方孔13的至少一个侧壁形成第一止动面，驱动轴7 具有穿设于所述方孔内的部分且该部分设置有与该第一止动面匹配的第二止动面。在另一替代实施方式中，驱动轴7穿设入所述方孔内的部分的形状与方孔13的形状相适配，使得第二级蜗轮5转动时带动所述驱动轴7一同转动。或者，在如图4所示出的实施方式中，第二级蜗轮5的中央开设一花键孔，驱动轴7为花键轴，第二级蜗轮5的花键孔与驱动轴7采用花键联接，从而实现驱动轴7与第二级蜗轮5的联动。
图4示出了根据本发明实施例的传动装置的局部详细示意图。出于清楚的目的，靠背框架仅被部分示出，且箱体组件14被部分地剖开，以部分地示出容纳在该箱体组件14内的蜗轮蜗杆机构。
在图4中示出了驱动轴7带动靠背框架8转动的一种优选结构。具体地，所述驱动轴7的与所述第二级蜗轮5相对的一端由可转动的安装板10支承，且安装板10由驱动轴7驱动，靠背框架8通过紧固装置9被紧固至安装板10上，使得驱动轴7的转动可以通过安装板4传递给靠背框架8。
为了进一步实现动力传递过程中的减速增扭，使座椅靠背的角度调节操作更加容易实施，优选地，安装板10和驱动轴7之间设置有行星传动轮系。结合参见图4，行星传动轮系包括有太阳轮、内齿圈、行星轮和行星架，其中太阳轮与驱动轴7同轴联接，内齿圈形成于固定的座椅侧支座11中，行星轮同时与太阳轮和内齿圈相啮合并固定于行星架上，安装板10可以与行星架一体成型或者附接在一起。这样，驱动轴7带动太阳轮转动，并通过啮合的行星轮带动行星架和安装板10转动，进而带动靠背框架8一同转动，因而可以根据座椅使用者的需要而适当地调整座椅靠背的角度。
所述紧固装置8优选为螺栓。然而，应了解的是，本领域内已知的任何适合紧固的其他装置也都落入本发明所要求保护的范围内。
需要说明的是，可以理解，在两级蜗轮蜗杆传动机构的传动比合适的情况下，可以不设置上述行星传动轮系。此时使安装板10通过轴承可转动地支承于座椅侧支座11上，驱动轴7安装至安装板10的中心孔内并与安装板10不可相对转动地联接，并且通过驱动轴7的转动直接带动安装板10进而带动靠背框架8的转动。
根据本发明的一优选实施例，如图2和3所示，所述第一级蜗轮传动机构和所述第二级蜗轮传动机构在空间上以90°交错布置、即布置成使得第一级蜗杆4的轴线A与第二级蜗轮5的轴线B在空间上彼此正交，使得能够将传动结构需要的安装空间压缩至最小。
有利地，第一级蜗轮传动机构采用多头蜗轮蜗杆传动，以保证高效率的传动。特别地，第一级蜗杆4的头数优选为两头或三头以上。根据本发明的一有利实施例，例如包括两头蜗杆的所述第一级蜗轮传动机构的传动比为约8.5，传动效率高达60％左右。
另外，与第一级蜗轮传动机构不同，第二级蜗轮传动机构优选地采用单头蜗轮蜗杆传动，使得能够在保持驱动器所需的自锁功能的情况下提高齿轮重合度，从而增强齿轮啮合强度。
在一特定实施例中，第二级蜗轮蜗杆传动比设计为约46，且第二级蜗轮传动机构的第二级蜗杆6的导程角设计为保持在7.83°以下，但尽可能地在保证蜗轮蜗杆自锁能力的前提下提高第二级蜗轮传动机构的传动效率。
根据本发明的实施例，第一级蜗轮传动机构中的第一级蜗杆4与作为动力源的电机12的动力输出轴联接，并通过电机的正反转实现对座椅靠背角度的增减的控制。优选地，所述座椅靠背的角度调节范围为-10°至+80°。
在根据本发明的两级蜗轮蜗杆传动装置中，第一级蜗杆4和第二级蜗杆6优选地采用金属材料制成，而第一级蜗轮3和第二级蜗轮5采用塑料材料制成。此外，用于容纳所述两级蜗轮蜗杆传动装置的箱体组件14也优选地采用塑料材料一体注塑成型。
应了解的是，由于蜗轮蜗杆传动具有传动比大、自锁性能好、运行噪音低等优点，尤其适用于汽车座椅的相关驱动装置中。在本发明中，通过采用两级蜗轮蜗杆传动机构且省去传统装置中的齿轮啮合传动级，更好地限制了各传动部件在运行过程中由于齿轮的重合度低等引起的各种跳动，很好地实现降噪、且同时提高了***的运行稳定性，因而使得乘客尤其是在调节座椅靠背的角度位置时的舒适性大大提高。
应当指出，上面说明的实施例仅应被视为示例性的，本发明不限于这 些实施例。通过考虑本说明书的内容，本领域技术人员可在不偏离本发明的范围或精神的情况下做出多种改变和变型。本发明的真实范围由所附权利要求以及等同方案限定。

Claims (10)

  1. 一种用于调节座椅靠背角度的传动装置，其特征在于，包括：
    第一级蜗轮传动机构，其包括：相啮合的第一级蜗轮和第一级蜗杆；所述第一级蜗杆适于与动力源的动力输出轴联接；
    第二级蜗轮传动机构，其包括：相啮合的第二级蜗轮和第二级蜗杆；所述第二级蜗杆与所述第一级蜗轮同轴联接；
    驱动轴，其第一端穿设在所述第二级蜗轮的中心孔中并与所述第二级蜗轮不可相对转动地联接；和
    支承于座椅侧支座上的可转动的安装板，所述安装板的中心孔用于接收所述驱动轴的第二端，所述安装板由所述驱动轴驱动，且所述安装板上设置有用于安装靠背框架的安装孔。
  2. 根据权利要求1所述的传动装置，其特征在于，所述第二级蜗轮的中心孔内具有第一止动面，所述驱动轴位于所述第二级蜗轮的中心孔内的部分具有与所述第一止动面相匹配的第二止动面。
  3. 根据权利要求1所述的传动装置，其特征在于，所述驱动轴与所述第二级蜗轮的中心孔通过花键联接。
  4. 根据权利要求1至3中任一项所述的传动装置，其特征在于，所述驱动轴与所述安装板之间设置有行星传动轮系，所述行星传动轮系包括：太阳轮、内齿圈、行星轮和行星架；所述行星架与所述安装板一体成型或者附接在一起，所述太阳轮安装于所述驱动轴的第二端并与所述驱动轴同轴联动；所述内齿圈形成于所述座椅侧支座上；所述行星轮安装于所述行星架上，并同时与所述太阳轮和所述内齿圈啮合。
  5. 根据权利要求1至3中任一项所述的传动装置，其特征在于，所述第一级蜗轮传动机构和所述第二级蜗轮传动机构在空间上以90°交错布置，使得所述第一级蜗杆的轴线与所述第二级蜗轮的轴线在空间上彼此正交。
  6. 根据权利要求1至3中任一项所述的传动装置，其特征在于，所述第一级蜗轮传动机构为多头蜗轮蜗杆传动，并且/或者，所述第二级蜗轮传 动机构为单头蜗轮蜗杆传动。
  7. 根据权利要求1至3中任一项所述的传动装置，其特征在于，所述第二级蜗杆的导程角保持在7.83°以下，并且/或者，所述第一级蜗杆的头数为两头或三头以上。
  8. 根据权利要求1至3中任一项所述的传动装置，其特征在于，所述第一级蜗杆和第二级蜗杆采用金属制成，所述第一级蜗轮和第二级蜗轮采用塑料材料制成。
  9. 根据权利要求1至3中任一项所述的传动装置，其特征在于，所述动力源为电机。
  10. 一种车辆，其特征在于，所述车辆的座椅中设置有权利要求1至9中任一项所述的用于调节座椅靠背角度的传动装置。
PCT/CN2017/108338 2017-01-17 2017-10-30 用于调节座椅靠背角度的传动装置和包括传动装置的车辆 WO2018133488A1 (zh)

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