CN111630301B - 线性致动器 - Google Patents

线性致动器 Download PDF

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CN111630301B
CN111630301B CN201980009362.8A CN201980009362A CN111630301B CN 111630301 B CN111630301 B CN 111630301B CN 201980009362 A CN201980009362 A CN 201980009362A CN 111630301 B CN111630301 B CN 111630301B
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spring
spindle
nut
cylindrical element
linear actuator
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CN111630301A (zh
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J·莱珂
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Linak AS
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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
    • F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
    • F16H25/2454—Brakes; Rotational locks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
    • B60T11/04—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting mechanically
    • B60T11/046—Using cables
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/66—Electrical control in fluid-pressure brake systems
    • B60T13/662—Electrical control in fluid-pressure brake systems characterised by specified functions of the control system components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
    • B60T13/746—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive and mechanical transmission of the braking action
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/18—Safety devices; Monitoring
    • B60T17/22—Devices for monitoring or checking brake systems; Signal devices
    • B60T17/221—Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems
    • 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
    • F16H19/00—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion
    • F16H19/02—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion
    • F16H19/06—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion comprising flexible members, e.g. an endless flexible member
    • F16H19/0622—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion comprising flexible members, e.g. an endless flexible member for converting reciprocating movement into oscillating movement and vice versa, the reciprocating movement is perpendicular to the axis of oscillation
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
    • H02K7/1163—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears where at least two gears have non-parallel axes without having orbital motion
    • H02K7/1166—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears where at least two gears have non-parallel axes without having orbital motion comprising worm and worm-wheel
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2121/00—Type of actuator operation force
    • F16D2121/18—Electric or magnetic
    • F16D2121/24—Electric or magnetic using motors
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00—Components of actuators
    • F16D2125/18—Mechanical mechanisms
    • F16D2125/20—Mechanical mechanisms converting rotation to linear movement or vice versa
    • F16D2125/34—Mechanical mechanisms converting rotation to linear movement or vice versa acting in the direction of the axis of rotation
    • F16D2125/40—Screw-and-nut
    • 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
    • F16H2025/2031—Actuator casings
    • 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
    • F16H2025/2046—Screw mechanisms with gears arranged perpendicular to screw shaft axis, e.g. helical gears engaging tangentially the screw shaft
    • 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
    • F16H2025/2062—Arrangements for driving the actuator
    • F16H2025/2084—Perpendicular arrangement of drive motor to screw axis
    • 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
    • F16H2025/2062—Arrangements for driving the actuator
    • F16H2025/209—Arrangements for driving the actuator using worm gears
    • 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
    • F16H25/2454—Brakes; Rotational locks
    • F16H2025/2463—Brakes; Rotational locks using a wrap spring brake, i.e. a helical wind up spring for braking or locking

Abstract

线性致动器包括电机(2)，电机通过传动装置来驱动心轴单元，心轴单元包括至少一个心轴(4)，心轴带有心轴螺母(5)，心轴(4)配备有轴承(8)。大致管状调节元件(6)与心轴单元相连。为了在电机(2)的供电中断时将调节元件(6)保持在给定位置，设置了制动机构(11)，其包括弹簧和圆筒形元件(12)。圆筒形元件(12)具有螺纹销(12a)，螺母(13)布置在螺纹销上，弹簧围绕圆筒形元件(12)定位在螺母13)一侧和圆筒形元件(12)上的止动件(14)之间，使得弹簧将螺母(13)另一侧压靠在接触表面(16)上。因此，通过螺母一侧摩擦接触表面而产生制动力。因此，这是一种替代制动器结构，具有简单结构且弹簧仅施加压缩力。可根据弹簧力、螺母和接触表面之间的摩擦力及最终螺母上的螺距来调节制动力。

Description

线性致动器
技术领域
本发明涉及线性致动器，包括：电机，具有电机轴；传动装置，与电机轴连接；心轴单元，与传动装置连接，心轴单元包括带有心轴螺母的至少一个心轴，心轴配备有轴承；调节元件，与心轴单元连接；制动器，包括弹簧和圆筒形元件，用于在电机的供电中断时将调节元件保持在给定位置。
背景技术
一般来说，线性致动器应该是自锁的，以确保在电机的供电中断时，还处于最大负载下的致动元件同样保持在期望的位置。就此而言，线性致动器总体上可以分为装备有自锁心轴的线性致动器和装备有非自锁心轴的线性致动器。心轴是自锁还是非自锁主要取决于螺距。如果螺距低于摩擦系数，则心轴是自锁的；如果螺距较大，则心轴是非自锁的。然而，摩擦是不明确的，并且取决于各种条件，例如材料、对材料的加工、润滑、温度和动态影响(例如振动)。此外，静摩擦和动摩擦彼此是有区别的，静摩擦大于动摩擦。
非自锁心轴优于自锁心轴的原因有很多。一个原因是，与自锁心轴相比非自锁心轴具有更高的效率，这意味着非自锁心轴的操作比自锁心轴的操作能耗更低。另一个原因是，由于螺距较大，非自锁心轴的调节速度比自锁心轴快。另一方面，应该考虑的是，线性致动器一般应该是自锁的，以便当电机的供电中断时致动元件保持在已经到达的位置。这导致通常选择螺距接近自锁的心轴。
在带有明确自锁心轴的致动器中，例如滚珠丝杠，使用了“驻车制动器”，当电机的供电中断时该驻车制动器防止心轴旋转，从而在电机的供电中断时将致动元件保持在已经到达的位置。例如，“驻车制动器”可以是螺线管制动器或螺旋弹簧，其中，弹簧的两端被致动。螺线管制动器包括制动盘，通过电磁铁来操作制动盘。对于带螺旋弹簧的“驻车制动器”来说，其外侧抵靠着周围壁而拉紧，并且在弹簧的中空部中有爪形离合器，弹簧的两个弯曲端分别与爪形离合器的相应部分接合。当启动电机时，爪形离合器拉动弹簧的一端或另一端，并将其拉紧以减小弹簧的直径，从而使弹簧脱离与周围壁的接合。这里，弹簧用作离合器弹簧，并且本身不起实际制动功能。例如，LINAK A/S在WO 2005/079134A2中公开了此种“驻车制动器”。此制动器特别有效，但是相对昂贵，并且占据相对较大的空间，从而导致致动器的装设长度增加。另一种制动器不仅仅是驻车制动器，而且一般在心轴接近自锁时使用，它包括通过螺旋弹簧联接的两个圆筒形元件。滚针轴承位于两个圆筒形元件之间，并且摩擦盘位于两个圆筒形元件中的一个圆筒形元件的自由端部和固定部之间。在心轴的一个旋转方向上，两个圆筒形元件相互释放，并且心轴可以自由旋转。在另一个旋转方向上，两个圆筒形元件联接在一起，从而致动摩擦盘以制动心轴。这里，弹簧还用作离合器弹簧，因为它分别联接和分离两个圆筒形元件。例如，Tsubakimoto Chain公司在US 5,910,692 B1中公开了此种制动器。应注意的是，这种制动器最初是由美国华纳电气公司开发和引进的。制动器的这种构造本身是好的，但是由相对而言很多构件组成、相对昂贵并且占用大量空间。已知一种不同且简单的制动器，其简单地包括位于心轴端部圆筒形元件或传动装置中齿轮周围的螺旋弹簧。在心轴的一个旋转方向上，弹簧将从圆筒形元件上松开，并且心轴可以自由旋转。这是由于：弹簧的角度方向布置成使得其受到影响而试图从圆筒形元件上展开，从而弹簧的直径被扩大。在心轴的另一个旋转方向上，弹簧将自身围绕圆筒形元件拉紧并施加制动力，从而在电机的供电中断时保持心轴不动。制动力适配成使得可以当致动元件朝向初始位置反转时由电机克服制动力。因此，当电机的供电中断时制动器主动地帮助停止心轴，正如当致动元件朝向初始位置反转时制动器起作用一样，即制动器衰减致动元件的返回速度。与上面提到的制动器不同，弹簧在这里起到实际制动器的作用，即弹簧本身施加制动力。由LINAK A/S开发和引进了这种制动器，并且在LINAK A/S的EP 0 662573B1中公开了。这种制动器被广泛使用，因为它有效而且非常便宜。然而，很难确定制动力，因为摩擦是不明确的并且取决于例如润滑和温度。德国OKIN公开了一种制动器，其中，弹簧制动器具有圆形横截面，从而在两个相邻绕组之间的中空部用作润滑剂储存部。在另一侧上，该弹簧的接触表面是线形的，这与具有正方形横截面的弹簧相反，具有正方形横截面的弹簧接触表面是扁平的。此外，常规情况下，弹簧放置在塑料制成的蜗轮的圆柱形突出边缘上，并且弹簧趋于切入塑料中，这还是使得难以确定制动力。当致动器工作时，在蜗轮中产生热量，并且在从制动到完全停止期间以及在返回运动期间，在弹簧和蜗轮侧圆筒形元件之间进一步产生摩擦热量。这种热量产生对蜗轮的尺寸稳定性产生负面影响，从而弹簧会随着时间而更容易地切入圆筒形元件中。例如，寻求通过在蜗轮上的圆筒形元件周围放置金属衬套，使得弹簧接合金属衬套并且不与蜗轮直接接触来解决这个问题。然而，这并没有解决蜗轮的发热问题，此外，当衬套在旋转过程中与弹簧摩擦时会产生噪音。
发明内容
以上述后一种制动器结构为出发点，本发明的目的是提供一种替代的制动器结构，该制动器结构同样简单，但避免了至少一些上述问题。
根据本发明，这是通过构造如本发明所述的线性致动器来实现的，其中，圆筒形元件具有螺纹销，螺母布置在螺纹销上，并且弹簧围绕圆筒形元件定位在螺母的一侧和圆筒形元件上的止动件之间，使得弹簧将螺母的另一侧压靠在接触表面上。因此，通过螺母一侧摩擦接触表面而产生制动力。因此，施加的制动力取决于弹簧力。弹簧力越大，制动力越大。制动力还取决于螺母和接触表面之间的摩擦。即摩擦力越大，制动力越大。最后，螺距对制动力也很重要。较低的螺距导致较大的制动力。当圆筒形元件随螺距旋转时，由于螺母和接触表面之间的摩擦，螺母趋于将自身旋离接触表面。另一方面，当圆筒形元件逆螺距旋转时，螺母倾向于紧抵接触表面，从而增加制动力。
在一实施例中，弹簧是圆筒形的，使得可以简单地推靠到圆筒形元件的螺纹上。这里的决定性因素是弹簧的弹簧力，但是对弹簧丝的精度没有如根据EP 0 662 573 B1的弹簧制动器的情况那样特别的要求，在EP 0 662 573 B1中围绕圆筒形元件的弹簧张力和接触表面是非常重要的。
在一替代实施例中，弹簧是扭转弹簧，一个端部保持在螺母中，而另一端部保持在圆筒形元件中。在螺母中，弹簧的端部可以优选地保持在狭缝中；在圆筒形元件中，弹簧的端部可以保持在凹槽中。
如上所述，制动器可以布置在致动器中的圆筒形元件上，并且在一实施例中，它布置在后端，即心轴的轴杆上，即心轴单元可以构造成是具有准备好安装在致动器中的制动器的一体单元。
在另一个实施例中，制动器布置在电机轴上，优点是制动器所承受的扭矩不是很大。
可以由制动器所围绕着构造的旋转元件来构成用于制动器的圆筒形元件。在一实施例中，圆筒形元件构造成是安装在旋转元件上的独立元件。因此，可以以更精确的方式制造带螺纹的圆筒形元件，或者可以用合适的塑料材料铸造成一体单元。
可以由独立元件来构成制动器的螺母与之配合的接触表面，然而优选的是采用致动器的已有表面，例如壳体的侧表面。
附图说明
下面将参考附图更全面地描述根据本发明的线性致动器，其中：
图1示出了线性致动器，其包括两部分式壳体，但一部分已经移除，
图2示出了线性致动器的制动器的细节部，
图3示出了图2的细节部的纵剖面，以及
图4示出了图2的细节部的透视图。
具体实施方式
图1示出了致动器，该致动器包括由塑料制成的两部分式壳体1和可逆电机2，该可逆电机通过蜗轮3来驱动具有心轴螺母5的心轴4，由外管7包围的形状为致动杆的调节元件6(也称为内管)固定在心轴螺母上，外管用作致动杆的导向件。心轴4的一个端部连同轴承8一起嵌入壳体1中。通过安装在壳体1后端的后安装件9和安装在致动杆自由端的前安装件10，致动器安装在应纳入的结构体中。
后端(心轴4的轴杆4a)配备有制动机构11，参考附图的图2、图3和图4更全面描述。呈衬套形式的圆筒形元件12安装在心轴4的轴杆4a上，该圆筒形元件固定成不可旋转，具有带外螺纹的部分即螺纹销12a。螺母13布置在螺纹销12a上。环形的止动件14固定在端部，即圆筒形元件12的前端。在该止动件14和螺母13前侧之间，设置有线圈或螺旋弹簧15，其在螺母13上施加压缩力。由于圆筒形元件12和螺母13上的螺纹是非自锁的，因此螺母13将向后推靠在接触表面16上，接触表面在这里由用于心轴4的轴承8所安放的座17的侧面构成。在心轴4的最后端，安装有离合器部分18，其用于与致动器的传动装置的输出级互连。从图中可以看出，轴承嵌在圆筒形元件12的环形部19和离合器部分18上。

Claims (7)

1.一种线性致动器，包括：电机(2)，具有电机轴；传动装置，与电机轴连接；心轴单元，与传动装置连接，其中，心轴单元包括至少一个心轴(4)，心轴带有心轴螺母(5)，其中，心轴(4)配备有轴承(8)；调节元件(6)，与心轴单元连接；制动机构(11)，包括弹簧和圆筒形元件(12)，用于在电机(2)的供电中断时将调节元件(6)保持在给定位置，其特征在于，圆筒形元件(12)具有螺纹销(12a)，螺母(13)布置在螺纹销上；弹簧围绕圆筒形元件(12)定位在螺母(13)的一侧和圆筒形元件(12)上的止动件(14)之间，使得弹簧将螺母(13)的另一侧压靠在接触表面(16)上。
2.根据权利要求1所述的线性致动器，其特征在于，弹簧是螺旋弹簧。
3.根据权利要求1所述的线性致动器，其特征在于，弹簧是扭转弹簧。
4.根据权利要求1所述的线性致动器，其特征在于，制动机构(11)布置在后端，即心轴(4)的轴杆(4a)上。
5.根据权利要求1所述的线性致动器，其特征在于，制动机构(11)布置在电机轴上。
6.根据权利要求1所述的线性致动器，其特征在于，圆筒形元件(12)构造为独立元件。
7.根据权利要求1所述的线性致动器，其特征在于，线性致动器包括壳体(1)，并且接触表面(16)由壳体(1)的侧表面构成。
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