WO2018133487A1 - 丝杆传动装置及电动车门锁 - Google Patents

丝杆传动装置及电动车门锁 Download PDF

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Publication number
WO2018133487A1
WO2018133487A1 PCT/CN2017/108337 CN2017108337W WO2018133487A1 WO 2018133487 A1 WO2018133487 A1 WO 2018133487A1 CN 2017108337 W CN2017108337 W CN 2017108337W WO 2018133487 A1 WO2018133487 A1 WO 2018133487A1
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Prior art keywords
screw
screw drive
nut
torsion spring
solenoid valve
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PCT/CN2017/108337
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English (en)
French (fr)
Inventor
田立
冯臣
朱建强
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广东肇庆爱龙威机电有限公司
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Publication of WO2018133487A1 publication Critical patent/WO2018133487A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts

Definitions

  • the present invention relates to a screw drive and to an electric door lock using the screw drive.
  • a screw drive also referred to as a screw (screw) nut mechanism or a screw drive, typically includes a lead screw and a nut, wherein the nut is placed over the lead screw. When one of the screw and the nut is turned, its rotation will be converted into a linear movement of the other.
  • screw drives are often used to convert and output rotational motion into linear motion.
  • a rotation restricting mechanism is usually provided on the screw. Under the action of the restricting mechanism, the screw does not rotate with the nut, but can be moved in the axial direction by the rotation of the nut.
  • the limiting mechanism includes, for example, a hexagonal section on the lead screw and a limiting block in a fixed position, and the limiting block is provided with a hexagonal through hole corresponding to the hexagonal section of the screw, and the hexagonal section of the screw The sleeve is disposed in the hexagonal through hole of the limiting block. Thereby, the screw can stop rotating under the restriction of the fixed limiting block, and can move axially relative to the limiting block in the through hole.
  • the present invention provides an improved screw drive comprising:
  • the outer surface of the screw rod is provided with an external thread
  • the inner hole surface of the nut is provided with an internal thread, wherein the nut is fitted on the screw, and the internal thread and the external thread are in mesh with each other;
  • a damping mechanism that connects the lead screw to buffer and ultimately stop rotation of the lead screw.
  • the screw rod is further connected with a limiting member, the limiting member and the screw rod are not mutually rotatable, and the damping mechanism is connected to the screw rod through the limiting member.
  • the damping mechanism comprises a torsion spring, one end of the torsion spring is fixed to the limiting member, and the other end is selectively connected to the clutch mechanism, wherein the other end of the torsion spring is in the clutch mechanism It is prevented from rotating when engaged, and is free to rotate when it is disconnected from the clutch mechanism.
  • the clutch mechanism is a solenoid valve
  • the solenoid valve includes a spool, wherein the spool engages the other end of the torsion spring and prevents it from rotating when the solenoid valve is energized, and the solenoid valve is broken The valve spool is disconnected from the other end and allowed to rotate freely.
  • the other end of the torsion spring is fixedly provided with a connecting member via which the valve core of the solenoid valve is engaged or broken away from the other end of the torsion spring.
  • the nut is driven by an electric motor and the electric motor and clutch mechanism are set to start and stop simultaneously.
  • a through hole is disposed in the limiting member, and the lead rod passes through the through hole and is axially movable along the through hole.
  • the lead screw comprises an outer hexagonal cross-section section, the outer hexagonal cross-section section being at least partially sleeved in the through-hole, and the through-hole has a corresponding hexagonal cross-sectional shape.
  • the limit member is fixed to be rotatable only with the screw.
  • the present invention also provides an electric door lock, comprising: a lock cylinder; and according to the present invention
  • the lock cylinder performs a locking or unlocking operation under the drive of the screw drive.
  • the invention effectively avoids the noise that may occur when the screw drive device is started or reversed by providing the damping device between the screw rod and the limiting member, and also reduces the deformation of the component, thereby improving the operation precision and accuracy of the product. Sex.
  • FIG. 1 shows a perspective view of an exemplary screw drive in accordance with the present invention.
  • ⁇ RTI ID 0.0>1 ⁇ / RTI> ⁇ RTIgt; ⁇ / RTI> ⁇ RTIgt; ⁇ / RTI> ⁇ RTIgt; ⁇ / RTI> ⁇ RTIgt; ⁇ / RTI> ⁇ RTIgt; ⁇ / RTI> ⁇ RTIgt;
  • the screw drive of the present invention will be exemplified below in the context of an automatic door lock application. It should be understood that the screw drive in accordance with the present invention can also be used in numerous other power transmission applications. Those skilled in the art will appreciate the specific application of the screw drive of the present invention to other products after the use of the screw drive of the present invention.
  • first,” “second,” and the like are not intended to limit any order, and are merely intended to distinguish between individual parts, parts, structures, elements, and the like.
  • the parts, structures, and components may be the same, similar, or different.
  • the screw drive device includes a nut 10 and a screw rod 20, and the outer surface of the screw rod 20 is provided with an outer surface Threaded, and the inner bore surface of the nut 10 is provided with internal threads, wherein the nut 10 is fitted over the lead screw 20 and the internal thread is in mesh with the external thread.
  • the nut 10 is fixed such that, in operation, the nut 10 can only be rotated and cannot move in the axial direction, and the lead screw 20 is axially moved under the driving of the nut 10.
  • the contents of the nut 10 and the lead screw 20 included in the present invention are well known to those skilled in the art, and thus any structure and material known in the art can be employed.
  • the nut 10 in the illustrated example is rotated by the motor 60 and the transmission mechanism.
  • the motor 60 includes a rotating shaft 61.
  • the rotating shaft 61 is provided with a first worm 71.
  • the first worm 71 and the first turbine 72 constitute a first-stage transmission mechanism, which converts the rotational motion of the motor rotating shaft 61 into a first A rotational movement of a turbine 72.
  • a second worm 73 is disposed on the rotating shaft of the first turbine 72, and the second worm 73 and the nut 10 constitute a secondary transmission, which further converts the rotational motion of the first turbine 72 into the nut 10 The rotation.
  • the motor 60 can drive the nut 10 to rotate via a two-stage transmission.
  • the two-stage transmission mechanism can be arranged in an axially parallel arrangement between the motor and the screw drive to save as much space as possible for the axial length of the motor and the screw drive.
  • other drive designs can be used based on different considerations.
  • the screw drive further includes a damping mechanism 30 that connects the lead screw 20 to buffer and ultimately stop the rotation of the lead screw 20.
  • a damping mechanism 30 that connects the lead screw 20 to buffer and ultimately stop the rotation of the lead screw 20. It will be appreciated that the damping mechanism is used in place of the prior art screw rotation limiting mechanism. The specific structure and method of the damper mechanism 30 will be specifically described below.
  • the damper mechanism 30 includes a torsion spring 31 that is fixedly provided with a connector 32 at an upper end portion thereof.
  • the connector 32 is selectively connectable to the clutch mechanism 50.
  • the clutch mechanism 50 is exemplified as a solenoid valve in the drawing, and the solenoid valve includes a spool 51, wherein the spool 51 protrudes and engages the connecting member 32 to connect the torsion spring 31 when the solenoid valve is energized.
  • the upper end portion is described, and when the solenoid valve is de-energized, the spool 51 is disconnected from the connecting member 32 to be separated from the upper end portion of the torsion spring 31.
  • the motor 60 and the clutch mechanism 50 can be set to start and stop simultaneously, that is, when the motor 60 starts to operate, the solenoid valve is also activated immediately, and the spool 51 extends into and engages the connector 32 to fix the The upper end portion of the torsion spring 31.
  • the clutch mechanism 50 may be other than the solenoid valve as long as the connecting member 32 and the upper end portion of the torsion spring 31 can be selectively fixed and loosened.
  • the torsion spring 31 is fixed to the stopper 40 at a lower end portion in the drawing.
  • the limiting member 40 and the lead screw 20 are not rotatably connected to each other, and the torsion spring is connected to the screw rod 20 through the limiting member 40.
  • the limiting member 40 is provided with a through hole having a hexagonal cross-sectional shape, and at the same time, the screw rod 20 includes an outer hexagonal cross-section section, and the outer hexagonal cross-section section is sleeved on the inner hexagonal portion.
  • the screw 20 is not rotatable relative to the limiting member 40, but is movable along the through hole.
  • the function of the limiting member 40 is mainly to limit and guide the axial movement of the screw rod 20. For this reason, the limiting member 40 is preferably fixed to rotate only with the screw rod 20.
  • the clutch mechanism 50 When the motor 60 is started to drive the screw 20, the clutch mechanism 50 is simultaneously activated, and the spool 51 projects into and engages the connecting member 32, thereby fixing the upper end portion of the torsion spring 31.
  • the rotation of the rotating shaft 61 of the motor 60 is finally converted into the rotation of the nut 10 via the primary transmission mechanism and the secondary transmission mechanism.
  • the nut 10 rotates around the axis in the original direction, thereby driving the screw 20 to rotate. Since the screw rod 10 and the limiting member 40 are not rotatable relative to each other, the screw rod 20 further drives the limiting member 40 to rotate, and the limiting member 40 further drives the lower end portion of the torsion spring 31 to rotate.
  • the clutch mechanism 50 since the upper end portion of the torsion spring 31 and the connecting member 32 are fixed by the clutch mechanism 50, it will generate more and more resistance to the limiting member 40 and the screw rod 20 until the resistance is finally greater than the nut 10 to the screw rod 20.
  • the frictional force at this time, the screw 20 will no longer rotate with the nut 10, or the screw 20 and the nut 10 will rotate relative to each other, and the relative rotation will be converted into the axial movement of the screw 20.
  • the solenoid valve 50 is simultaneously stopped, and the spool 51 is retracted and separated from the connecting member 32, so that the upper end portion of the torsion spring 31 is freely rotated to a relaxed state.

Abstract

一种丝杆传动装置及相应的电动车门锁，其装置包括：丝杆（20），所述丝杆（20）的外表面上设置有外螺纹；螺母（10），所述螺母（10）的内孔表面上设置有内螺纹，所述螺母（10）套装在所述丝杆（20）上，并且所述内螺纹与所述外螺纹相互啮合；阻尼机构（30），所述阻尼机构（30）连接所述丝杆（20）以缓冲并最终停止所述丝杆（20）的旋转。

Description

丝杆传动装置及电动车门锁
本申请要求于2017年1月17日递交的中国专利申请第201720060210.9号的优先权，在此全文引用上述中国专利申请公开的内容以作为本申请的一部分。
技术领域
本发明涉及一种丝杆传动装置，同时还涉及一种使用所述丝杆传动装置的电动车门锁。
背景技术
丝杆传动装置，也被称为丝杆(丝杠)螺母机构或螺旋传动机构，通常包括丝杆和螺母，其中所述螺母套装于丝杆上。当转动丝杆和螺母中的其中一个时，其转动将被转换为另一个的直线移动。为此，丝杆传动装置常用于将旋转运动转换并输出为直线运动。
可以明白，在转动螺母时，所述丝杆会在螺母的摩擦力的驱动下跟随螺母一起转动。为此，现有技术中通常在丝杆上设置旋转限制机构.在所述限制机构的作用下，丝杆不会跟随螺母一起转动，但是可在旋转的螺母的驱动下沿轴向移动。所述限制机构比如包括丝杆上的六角截面部段以及处于固定位置的限位块，限位块中设置有与丝杆的六角截面相配合的内六角通孔，丝杆的六角截面部段套设于限位块的所述六角通孔内。从而，丝杆可在固定的限位块的限制下停止转动，同时可在所述通孔内相对限位块轴向移动。
然而，由于所述丝杆的六角截面部段与限位块的六角通孔之间所存在的间隙，在丝杆开始转动或变换转动方向时，丝杆会与限位块发生碰撞而产生扰人的噪音，该噪音对于很多应用场合，比如自动车门锁，是需要极力避免的。同时，丝杆与限位块之间经过反复的碰撞和摩擦后，还将导致接触面变形，从而降低产品的操作精度和准确性。
为此，现有技术中的丝杆传动装置，尤其是在用于诸如自动车门锁等领域时，仍然存在改进的空间，以望提高其使用性能和操作准确性。
发明内容
一方面，本发明提供一种改进的丝杆传动装置，包括：
丝杆，所述丝杆的外表面设置有外螺纹；
螺母，所述螺母的内孔表面上设置有内螺纹，其中，所述螺母套装在所述丝杆上，并且所述内螺纹与所述外螺纹相互啮合；
阻尼机构，所述阻尼机构连接所述丝杆以缓冲并最终停止所述丝杆的旋转。
优选地，所述丝杆上还连接有限位件，所述限位件与所述丝杆不可相互转动，并且所述阻尼机构通过所述限位件连接至所述丝杆。
优选地，所述阻尼机构包括扭簧，所述扭簧的一端固定至所述限位件、另一端可选择地连接至离合机构，其中，扭簧的所述另一端在与所述离合机构接合时被阻止发生转动、而在与所述离合机构断离时可自由转动。
优选地，所述离合机构为电磁阀，所述电磁阀包括阀芯，其中，在电磁阀通电时所述阀芯接合所述扭簧的所述另一端并阻止其转动、而在电磁阀断电时所述阀芯断离所述另一端并允许其自由转动。
优选地，扭簧的所述另一端上固定设置有连接件，电磁阀的所述阀芯经由所述连接件而接合或断离扭簧的所述另一端。
优选地，所述螺母由电动机驱动，并且所述电动机和离合机构被设置为同时启动和停止。
优选地，所述限位件中设置有通孔，所述丝杆穿过所述通孔并可沿所述通孔轴向移动。
优选地，所述丝杆包括外六角截面部段，所述外六角截面部段至少部分地套设于所述通孔内，并且所述通孔具有相应的内六角截面形状。
优选地，所述限位件被固定为仅能随所述丝杆转动。
另一方面，本发明还提供一种电动车门锁，包括：锁芯；和根据本发 明的丝杆传动装置，所述锁芯在所述丝杆传动装置的驱动下执行上锁或解锁操作。
本发明通过提供在丝杆和限位件之间的阻尼装置，有效地避免了丝杆传动装置在启动或换向时可能发生的噪音，还可减少部件变形，从而提高产品的操作精度和准确性。
附图说明
本发明的其他细节及优点将通过下文提供的详细描述而变得显而易见。下文将参照附图来进行详细描述，其中：
图1示出了根据本发明的一种例示性丝杆传动装置的立体示意图。
上述附图所示出的内容仅为举例和示意，而并不严格按照比例予以绘制，也并未完整地绘制出具体使用环境下相关的全部部件或细节。本领域技术人员在明了本发明的原理和构思之后，将能想到在特定的使用环境下为具体实施本发明而需要加入的本领域公知的相关技术内容。
具体实施方式
以下将在自动车门锁的应用场景下举例说明本发明的丝杆传动装置。应当明白，根据本发明的丝杆传动装置还可用于众多其他的动力传送场合。本领域技术人员在明了本发明的丝杆传动装置在自动车门锁上的运用后，能够想到其在其他产品上的具体运用。
此外，在以下描述中所使用的术语“第一”、“第二”等并不意欲限制任何序位，其目的仅仅在于区分各个独立的部件、零件、结构、元件等，并且这些独立的部件、零件、结构、元件可以相同、类似或者不同。同时，在以下描述中所使用的关于方位的说明，比如“上”、“下”、“内”、“外”、“左”、“右”、“径向”、“轴向”等，除非具有明确说明，仅为了方便描述，而无欲对发明技术方案形成任何限定。
参见图1，其中示出了根据本发明的一种具体的例示性丝杆传动装置。所述丝杆传动装置包括螺母10和丝杆20，所述丝杆20的外表面设置有外 螺纹，而所述螺母10的内孔表面设置有内螺纹，其中，所述螺母10套装在所述丝杆20上，并且所述内螺纹与所述外螺纹相互啮合。所述螺母10被固定成，在工作时，所述螺母10只能旋转而不能沿轴向移动，所述丝杆20在所述螺母10的驱动下沿轴向移动。在这个意义上，本发明所包括的螺母10和丝杆20的内容为本领域技术人员所公知，进而其可以采用本领域公知的任何结构和材料。
进一步地，如图所示，所述实例中的螺母10由电动机60和传动机构驱动旋转。具体而言，电动机60包括转轴61，转轴61上设置有第一蜗杆71，所述第一蜗杆71与第一涡轮72构成一级传动机构，其将所述电动机转轴61的旋转运动转化为第一涡轮72的旋转运动。同时，所述第一涡轮72的转轴上设置有第二蜗杆73，所述第二蜗杆73与螺母10构成二级传动，其进一步将所述第一涡轮72的旋转运动转化为所述螺母10的转动。由此，经由两级传动，所述电动机60可驱动所述螺母10发生转动。可以明白，所述两级传动机构的设置可以实现电动机和丝杆传动装置之间的轴向平行排布，从而尽可能地节约电动机和丝杆传动装置在轴向长度上所占用的空间。当然，基于不同的考虑，也可以采用其他的传动设计。
作为本发明针对现有技术的重要改进之一，所述丝杆传动装置还包括阻尼机构30，所述阻尼机构30连接所述丝杆20以缓冲并最终停止所述丝杆20的旋转。可以明白，所述阻尼机构用于代替现有技术中的丝杆转动限制机构。下文将对所述阻尼机构30的具体结构和方法做具体描述。
继续参见图1，所述阻尼机构30包括扭簧31，扭簧31在图中的上端部固定设置有连接件32。所述连接件32可选择地连接至离合机构50。所述离合机构50在图中例示为电磁阀，所述电磁阀包括阀芯51，其中，在电磁阀通电时所述阀芯51伸出并接合连接件32进而连接所述扭簧31的所述上端部，而在电磁阀断电时所述阀芯51断离所述连接件32进而与扭簧31的上端部分离。所述电动机60和离合机构50可被设置为同时启动和停止，也就是说，当电动机60开始工作时，电磁阀也立即被启动，其阀芯51伸入并接合连接件32以固定所述扭簧31的上端部。可以明白， 所述离合机构50也可以为电磁阀之外的其他结构，只要能选择性地固定和松开所述连接件32及所述扭簧31的上端部即可。
所述扭簧31在图中的下端部固定至限位件40。所述限位件40与丝杆20不可相互转动地连接，进而所述扭簧通过所述限位件40连接至所述丝杆20。具体而言，所述限位件40中设置有具有内六角截面形状的通孔，同时，所述丝杆20包括外六角截面部段，所述外六角截面部段套设于所述内六角通孔内，从而，所述丝杆20不可相对限位件40转动，却可沿所述通孔移动。可以明白，所述限位件40的作用主要是限制并引导丝杆20的轴向运动，为此，所述限位件40优选被固定为仅能随所述丝杆20转动。
在启动电动机60以驱动丝杆20时，离合机构50同时被启动，其阀芯51伸入并接合连接件32，进而固定所述扭簧31的上端部。电动机60的转轴61的转动经由所述一级传动机构和二级传动机构最终转变为螺母10的转动。螺母10在原位绕轴线转动，进而带动丝杆20转动。由于丝杆10与限位件40不可相互旋转，丝杆20进而带动限位件40转动，限位件40进一步带动扭簧31的下端部转动。同时，由于扭簧31的上端部及连接件32被离合机构50固定，其将对限位件40及而丝杆20产生越来越大的阻力，直至最终该阻力大于螺母10对丝杆20的摩擦作用力，此时，丝杆20将不再跟随螺母10一起转动，或者说，丝杆20与螺母10发生相对转动，该相对转动进而转化为丝杆20的轴向移动。之后，在停止电动机60时，电磁阀50同时被停止，阀芯51缩回并与连接件32分离，从而扭簧31的上端部自由旋转至松弛状态。
上文描述的仅仅是有关本发明的精神和原理的示例性实施方式。本领域技术人员可以明白，在不背离所述精神和原理的前提下，可以对所描述的示例做出各种变化，这些变化及其各种等同方式均被本发明人所预想到，并落入由本发明的权利要求所限定的范围内。

Claims (10)

  1. 一种丝杆传动装置，包括：
    丝杆(20)，所述丝杆的外表面上设置有外螺纹；
    螺母(10)，所述螺母的内孔表面上设置有内螺纹，其中，所述螺母(10)套装在所述丝杆上，并且所述内螺纹与所述外螺纹相互啮合；
    其特征在于，所述丝杆传动装置还包括:
    阻尼机构(30)，所述阻尼机构(30)连接所述丝杆(20)以缓冲并最终停止所述丝杆(20)的旋转。
  2. 根据权利要求1所述的丝杆传动装置，其特征在于，所述丝杆(20)上还连接有限位件(40)，其中，所述限位件(40)与所述丝杆(20)不可相互转动，并且所述阻尼机构(30)通过所述限位件(40)连接至所述丝杆(20)。
  3. 根据权利要求2所述的丝杆传动装置，其特征在于，所述阻尼机构(30)包括扭簧(31)，所述扭簧(31)的一端固定至所述限位件(40)、另一端可选择地连接至离合机构(50)，其中，扭簧(31)的所述另一端在与所述离合机构(50)接合时被阻止发生转动、而在与所述离合机构(50)断离时可自由转动。
  4. 根据权利要求3所述的丝杆传动装置，其特征在于，所述离合机构(50)为电磁阀，所述电磁阀包括阀芯(51)，其中，在电磁阀通电时，所述阀芯(51)接合所述扭簧(31)的所述另一端并阻止其转动；而在电磁阀断电时，所述阀芯(51)断离所述另一端并允许其自由转动。
  5. 根据权利要求4所述的丝杆传动装置，其特征在于，扭簧(31)的所述另一端上固定设置有连接件(32)，电磁阀的所述阀芯(51)经由所述连接件(32)而接合或断离扭簧(31)的所述另一端。
  6. 根据权利要求3所述的丝杆传动装置，其特征在于，所述螺母(10)由电动机(60)驱动，并且所述电动机(60)和离合机构(50)被设置为同时启动和停止。
  7. 根据权利要求2所述的丝杆传动装置，其特征在于，所述限位件 (40)中设置有通孔，所述丝杆(20)穿过所述通孔并可沿所述通孔轴向移动。
  8. 根据权利要求7所述的丝杆传动装置，其特征在于，所述丝杆(20)包括外六角截面部段，所述外六角截面部段至少部分地套设于所述通孔内，并且所述通孔具有相应的内六角截面形状。
  9. 根据权利要求2所述的丝杆传动装置，其特征在于，所述限位件(40)被固定为仅能随所述丝杆(20)转动。
  10. 一种电动车门锁，包括锁芯，其特征在于，所述电动车门锁还包括权利要求1‐9中任一项所述的丝杆传动装置，所述锁芯在所述丝杆传动装置的驱动下执行上锁或解锁操作。
PCT/CN2017/108337 2017-01-17 2017-10-30 丝杆传动装置及电动车门锁 WO2018133487A1 (zh)

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