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CN1296660A - Actuators with improved precision - Google Patents

Actuators with improved precision Download PDF

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Publication number
CN1296660A
CN1296660A CN99804977A CN99804977A CN1296660A CN 1296660 A CN1296660 A CN 1296660A CN 99804977 A CN99804977 A CN 99804977A CN 99804977 A CN99804977 A CN 99804977A CN 1296660 A CN1296660 A CN 1296660A
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CN
China
Prior art keywords
bearing
parts
nut
screw mechanism
actuator
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Pending
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CN99804977A
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Chinese (zh)
Inventor
阿明·赫伯特·埃米尔·奥古斯特·奥尔舍夫斯基
克莱尔·德鲁埃特
托马斯·威廉·富克斯
亨德里克斯·扬·卡潘
亚历山大·扬·卡雷尔·德弗里斯
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SKF Engineering and Research Centre BV
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SKF Engineering and Research Centre BV
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Publication of CN1296660A publication Critical patent/CN1296660A/en
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    • 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
    • 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
    • F16D65/00—Parts or details
    • F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
    • F16D65/18—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00—Components of actuators
    • F16D2125/18—Mechanical mechanisms
    • F16D2125/44—Mechanical mechanisms transmitting rotation
    • F16D2125/46—Rotating members in mutual engagement
    • F16D2125/52—Rotating members in mutual engagement with non-parallel stationary axes, e.g. worm or bevel 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
    • F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
    • F16H25/2247—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with rollers
    • F16H25/2252—Planetary rollers between nut and screw

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

An actuator comprising a housing (1,10), a motor, an actuating member and a screw mechanism for linear movement of the actuating member relative to the housing (1,10) in response to rotational movement of the motor, said screw mechanism comprising a screw (5,16) and a nut (1,17), at least one of which is rotatably supported relative to the housing (1,10) by means of a rolling element bearing (2,11), said rolling element bearing (2,11) having an inner race (6) and an outer race, and rolling elements in rolling contact with the races. At least one component of the screw mechanism, such as a screw (5,16), nut or roller (5,18) and/or at least one component of the bearing, such as a bearing inner ring or bearing outer ring, comprises a surface portion machined by a hard cutting operation, such as hard turning, hard milling, hard drilling, etc.

Description

具有改进精度的致动器Actuators with improved precision

本发明涉及一种致动器，该致动器包括一个壳体，一个马达，一个致动元件和一个螺旋机构，响应于马达的旋转运动，螺旋机构使致动元件相对于机架做线性运动。所述螺旋机构包括一螺杆和一螺母，二者中至少一个可通过一滚动元件轴承相对于壳体被可旋转地支承，所述滚动元件轴承具有一个内座圈和一个外座圈，以及与所述座圈滚动接触的滚动元件。The present invention relates to an actuator comprising a housing, a motor, an actuating element and a screw mechanism which causes linear movement of the actuating element relative to a frame in response to rotational movement of the motor . The screw mechanism includes a screw and a nut, at least one of which is rotatably supported relative to the housing by a rolling element bearing having an inner race and an outer race, and with The raceway is in rolling contact with the rolling elements.

这样的致动器已广为所知。它可被用作不同的用途，比如一圆盘刹车的制动钳。这种致动器包括多个具有精密机加工表面的部件，比如螺杆与螺母的螺纹，滚子，轴承座圈等等。这种致动器的大部分成本花费在机加工工艺上。Such actuators are widely known. It can be used for different purposes, such as a brake caliper for a disc brake. Such actuators consist of multiple components with precision machined surfaces, such as screw and nut threads, rollers, bearing races, and the like. Most of the cost of such an actuator is spent in the machining process.

人们尝试许多办法，一方面来满足精度的要求，另一方面以降低生产成本。本发明旨在提供一种能同时满足以上两者的致动器。该目的可以这样实现，即螺旋机构的至少一个部件如螺杆、螺母，或者滚子和/或轴承的至少一个部件如内轴承环或外轴承环，包括一个通过硬车、硬铣、硬钻等硬切削操作加工而成的表面部分。People try many ways, on the one hand to meet the requirements of precision, on the other hand to reduce production costs. The present invention aims to provide an actuator capable of satisfying both of the above requirements. This object can be achieved in that at least one part of the screw mechanism, such as a screw, a nut, or at least one part of a roller and/or a bearing, such as an inner bearing ring or an outer bearing ring, comprises a hard turning, hard milling, hard drilling, etc. The portion of a surface machined by a hard cutting operation.

响应于控制信号的致动器的位移的精确性在很大程度上取决于螺旋机构和轴承的多个表面的啮合。螺母和螺杆的螺纹、介于它们之间的滚子以及轴承的座圈等在此方面起着决定性的作用。这些表面的相对位置的精确性也很重要。通过硬切削加工，这些表面可整体形成于螺杆或螺母中，从而提供了固有的精确度，其不受累积制造误差的影响，而累积制造误差存在于多部件结构的装配过程中。The accuracy of the displacement of the actuator in response to the control signal is largely dependent on the engagement of the various surfaces of the screw mechanism and the bearing. The threads of the nut and the screw, the rollers between them and the raceways of the bearings play a decisive role in this. The accuracy of the relative positions of these surfaces is also important. These surfaces can be integrally formed in the screw or nut by hard machining, providing an inherent precision that is immune to the cumulative manufacturing errors that exist during assembly of multi-part structures.

硬车(削)是一种机加工淬硬钢部件的单点切削工艺。它被认为是一种可替代粗磨和精磨的机加工工艺。所述的硬车是利用陶瓷或超耐磨工具进行的。它尤其适合于既可降低生产成本又可满足合适的光洁度，因而仅通过一个生产步骤便足以得到所要求的产品。Hard turning (cutting) is a single-point cutting process for machining hardened steel components. It is considered as an alternative machining process for coarse and fine grinding. The hard turning is performed by using ceramic or super wear-resistant tools. It is especially suitable for reducing the production cost and satisfying the suitable finish, so that only one production step is enough to obtain the required product.

此外，一体化的表面可很方便地由一个多轴车床来加工，这既可满足精度要求，又可兼顾成本(提高生产率)。In addition, the integrated surface can be easily processed by a multi-spindle lathe, which can meet the accuracy requirements and take into account the cost (increased productivity).

轴承可直接或间接地支承着螺杆。此外，硬车后的表面部分可用于径向支承螺旋机构。而且，硬车后的表面部分也可用于轴向支承螺旋机构。Bearings may directly or indirectly support the screw. In addition, hard-turned surface portions can be used to radially support the screw mechanism. Furthermore, the hard-turned surface portion can also be used to axially support the screw mechanism.

根据进一步的可能性，该致动器可包括一个与螺旋机构相连的齿轮减速机构。该齿轮减速机构可包括一个通过硬车、硬铣、硬钻等硬切削操作加工而成的表面部分。According to a further possibility, the actuator may comprise a gear reduction mechanism connected to the screw mechanism. The gear reduction mechanism may include a surface portion machined by a hard cutting operation such as hard turning, hard milling, hard drilling, or the like.

另外，螺旋机构的至少一个部件如螺杆、螺母或滚子，和/或轴承的至少一个部件如轴承内环或轴承外环，和/或齿轮减速机构的至少一个部件，可包括一通过磨削加工而成的表面部分。In addition, at least one part of the screw mechanism, such as a screw, a nut or a roller, and/or at least one part of a bearing, such as a bearing inner ring or a bearing outer ring, and/or at least one part of a gear reduction mechanism, may include a The processed surface part.

而且，螺旋机构的至少一个部件如螺杆、螺母或滚子，和/或轴承的至少一个部件如轴承内环或轴承外环，和/或齿轮减速机构的至少一个部件，可包括一通过拉削加工而成的表面部分。Moreover, at least one part of the screw mechanism, such as a screw, a nut or a roller, and/or at least one part of a bearing, such as a bearing inner ring or a bearing outer ring, and/or at least one part of a gear reduction mechanism, may comprise a The processed surface part.

通过硬车加工工艺，还可以制造出致动器的螺杆、螺母等的多个整体部分。例如，通过该工艺，可在内环和/或外环内制造容纳密封件或防护件的沟槽。另外，螺母或螺杆可以这种方式设有传动装置，例如齿条，齿轮或齿，以与动力源进行直接或间接的啮合。Through the hard turning process, it is also possible to manufacture multiple integral parts of the actuator's screw, nut, etc. For example, by means of this process, grooves can be produced in the inner and/or outer ring to accommodate seals or shields. Alternatively, the nut or screw may be provided with gearing, such as a rack, pinion or teeth in this manner, for direct or indirect engagement with the power source.

特别是，至少一个部件可包括一表面部分，例如螺纹，它可通过硬锻、和/或硬轧、软车、淬火及硬车的顺序制造步骤得到。In particular, at least one component may comprise a surface portion, such as a thread, obtained by the sequential manufacturing steps of hard forging, and/or hard rolling, soft turning, quenching and hard turning.

或者，至少一个部件的至少一部分，例如轴承座圈的作用面，可通过如研磨或施加类金刚石涂层等表面改性工艺进行处理。Alternatively, at least a portion of at least one component, such as the active face of a bearing race, may be treated by a surface modification process such as grinding or applying a diamond-like coating.

此外，至少一个部件的至少一部分可从烧结粉末材料得到。Furthermore, at least a portion of at least one component may be obtained from sintered powder material.

进一步而言，至少一个部件的至少一部分可包括淬透或表面淬火材料，这些材料通过油、盐浴淬火工艺或喷射淬火技术或采用涂敷技术的表面淬火工艺得到。Further, at least a part of at least one component may comprise through hardened or case hardened material obtained by oil, salt bath or spray hardening techniques or surface hardening using coating techniques.

另外，至少一个部件的至少一部分，例如轴承座圈，可利用聚合物或喷射淬火技术进行感应表面淬火(硬化)处理。Additionally, at least a portion of at least one component, such as a bearing race, may be induction case hardened (hardened) using polymer or spray hardening techniques.

所讨论的轴承可以是四点接触式滚珠轴承或滚子轴承，例如滚针轴承或锥形滚子轴承。The bearings in question can be four-point contact ball bearings or roller bearings, such as needle or tapered roller bearings.

齿轮减速机构可以与螺旋机构的螺杆或螺母啮合。The gear reduction mechanism can engage with the screw or the nut of the screw mechanism.

在这方面，螺杆或螺母可包括一个为一齿轮减速装置支承轴承而设的(附加)座圈，所述齿轮减速装置可同时与螺旋机构和一动力源啮合。In this respect, the screw or nut may comprise an (additional) race for a support bearing of a gear reduction which can engage both the screw mechanism and a power source.

根据第一种可能性，螺母可通过一滚动元件轴承相对于壳体被可旋转地支承，该轴承的内环与螺母构成一整体或与螺母的一参考面啮合。According to a first possibility, the nut can be rotatably supported relative to the housing via a rolling element bearing, the inner ring of which is integral with the nut or engages with a reference surface of the nut.

根据第二种可能性，螺杆可通过一滚动元件轴承相对于壳体被可旋转地支承，该轴承的内环与螺母构成一整体或与螺母的一参考面啮合。According to a second possibility, the screw can be rotatably supported relative to the housing via a rolling element bearing, the inner ring of which is integral with the nut or engages with a reference surface of the nut.

有几种类型的钢可适用于通过硬切削工艺加工而成的部件。这些钢例如可以是渗碳钢、锻钢、粉末成形钢、轧钢、铸钢和工具钢等等。There are several types of steel that are suitable for components produced by hard cutting processes. These steels may be, for example, carburized steels, forged steels, powder formed steels, rolled steels, cast steels, tool steels, and the like.

本发明还涉及一种制造根据前述任一权利要求所述的致动器的方法，所述致动器包括一个壳体，一个马达，一个致动元件和一个螺旋机构，响应于马达的旋转运动，螺旋机构使致动元件相对于机架做线性运动，所述螺旋机构包括一螺杆和一螺母，二者中至少一个可通过一滚动元件轴承相对于壳体被可旋转地支承，所述滚动元件轴承具有一个内座圈和一个外座圈，以及与所述座圈滚动接触的滚动元件。The invention also relates to a method of manufacturing an actuator according to any one of the preceding claims, said actuator comprising a housing, a motor, an actuating element and a screw mechanism, responsive to the rotational movement of the motor , the screw mechanism makes the actuator element move linearly relative to the frame, the screw mechanism includes a screw and a nut, at least one of which can be rotatably supported relative to the housing by a rolling element bearing, the rolling element bearing Element bearings have an inner race and an outer race, and rolling elements in rolling contact with the races.

根据本发明，该方法包括通过例如硬车、硬铣、硬钻等硬切削操作制造螺旋机构中至少一个部件如螺杆、螺母、保持架、凸轮、滚子或滚珠的表面部分，和/或轴承的至少一个部件如轴承内环或轴承外环的表面部分的步骤。According to the invention, the method comprises manufacturing at least one part of a screw mechanism, such as a screw, a nut, a surface portion of a cage, a cam, a roller or a ball, and/or a bearing, by a hard cutting operation such as hard turning, hard milling, hard drilling, etc. at least one component such as a bearing inner ring or a surface portion of a bearing outer ring.

进一步而言，该方法可包括通过例如硬车、硬铣、硬钻等硬切削操作制造齿轮减速机构的至少一个部件的表面部分的步骤。Further, the method may comprise the step of manufacturing the surface portion of at least one component of the gear reduction mechanism by hard cutting operations such as hard turning, hard milling, hard drilling, etc.

此外，该方法可包括通过磨削制造螺旋机构中至少一个部件如螺杆、螺母、保持架、凸轮、滚子或滚珠的表面部分，和/或轴承的至少一个部件如轴承内环或轴承外环的表面部分，和/或齿轮减速机构的至少一个部件的表面部分的步骤。In addition, the method may comprise manufacturing by grinding at least one part of a screw mechanism such as a screw, a nut, a surface portion of a cage, a cam, a roller or a ball, and/or at least one part of a bearing such as a bearing inner ring or a bearing outer ring a surface portion of, and/or a surface portion of at least one component of the gear reduction mechanism.

而且，该方法可包括通过拉削制造螺旋机构中至少一个部件如螺杆、螺母、保持架、凸轮、滚子或滚珠的表面部分，和/或轴承的至少一个部件如轴承内环或轴承外环的表面部分，和/或齿轮减速机构的至少一个部件的表面部分的步骤，和/或在螺杆或螺母至少一个中制造所述轴承的内环或一轴承内环的参考面的步骤。Furthermore, the method may comprise manufacturing by broaching at least one part of a screw mechanism such as a screw, a nut, a surface portion of a cage, a cam, a roller or a ball, and/or at least one part of a bearing such as a bearing inner ring or a bearing outer ring and/or the step of surface portions of at least one component of the gear reduction mechanism, and/or the step of manufacturing the inner ring of the bearing or a reference surface of a bearing inner ring in at least one of the screw or the nut.

所述硬切削操作可通过具有至少两个同时工作的切削刀片的切削头进行。多切削刀片的切削工具的使用可实现快速加工。The hard cutting operation can be performed by a cutting head having at least two simultaneously working cutting inserts. The use of cutting tools with multiple cutting inserts enables fast machining.

下面参考附图中所示的实施例对本发明做进一步的详细描述。The present invention will be described in further detail below with reference to the embodiments shown in the accompanying drawings.

图1示出了螺旋致动器的第一实施例的部件。Figure 1 shows the components of a first embodiment of a screw actuator.

图2示出了螺旋致动器的第一实施例的部件。Figure 2 shows the components of a first embodiment of the screw actuator.

图1中的致动器包括一螺母1，它通过轴承2在壳体3内被可旋转地支承。通过滚子4，螺母与螺杆5啮合。通过旋转螺母1，螺杆5可进行轴向位移。滚子以公知方式安装在保持架30内。The actuator in FIG. 1 comprises a nut 1 which is rotatably supported in a housing 3 via bearings 2 . Via the rollers 4 the nut engages with the screw 5 . By rotating the nut 1, the screw rod 5 can be axially displaced. The rollers are mounted in the cage 30 in a known manner.

根据本发明，该致动器的若干表面已经通过硬切削加工而成。例如，与螺母1成一体的轴承2的座圈6就是通过硬车(削)加工而成的。螺杆的螺纹7也可通过硬切削工艺进行加工。According to the invention, several surfaces of the actuator have been machined by hard machining. For example, the raceway 6 of the bearing 2 integrated with the nut 1 is formed by hard turning (cutting). The thread 7 of the screw can also be machined by hard machining.

另外，滚子4和螺母的内螺纹也可通过这种方式获得。In addition, the inner thread of the roller 4 and the nut can also be obtained in this way.

螺母可进一步包含一通过硬车加工而成的座圈8。该座圈8可用于一滚状轴承，例如以支承致动器的其它部件，如齿轮减速机构。The nut may further comprise a race 8 which is hard turned. The race 8 can be used for a roller bearing, for example to support other parts of the actuator, such as a gear reduction mechanism.

根据图2的致动器包括一壳体10，其带有止推轴承11。止推轴承11支承着一与齿轮13相连的套筒12，齿轮13被一齿轮传动机构如斜齿轮14驱动。齿轮14通过一轴15与一马达(未示出)相连。The actuator according to FIG. 2 comprises a housing 10 with a thrust bearing 11 . The thrust bearing 11 supports a sleeve 12 which is connected to a gear 13 which is driven by a gear transmission such as a helical gear 14 . The gear 14 is connected via a shaft 15 to a motor (not shown).

套筒12反过来与螺杆16相连。螺杆16可借助于齿轮13，14进行旋转，但不能轴向移动。The sleeve 12 is in turn connected to the screw 16 . The screw 16 is rotatable by means of gears 13, 14, but cannot move axially.

随着螺杆的转动，螺母17通过滚子18轴向移动。螺母17反过来通过中间套筒19与活塞20相连。As the screw turns, the nut 17 moves axially via the rollers 18 . The nut 17 is in turn connected to the piston 20 via an intermediate sleeve 19 .

活塞20具有一个外部轴向凹槽21，它与壳体10内一突出部22啮合。这样，活塞20和螺母17可轴向移动，但不能旋转。Piston 20 has an external axial groove 21 which engages with a projection 22 in housing 10 . In this way, the piston 20 and the nut 17 can move axially, but cannot rotate.

图2所示的致动器的多个表面是通过硬切削加工得到的。如同图1所示的致动器那样，滚子18以及螺杆16、螺母17的螺纹可通过硬车加工获得。套筒12的凸缘24的参考面23，该参考面23限定了轴承11的位置，也可通过这种方式得到。Several surfaces of the actuator shown in Figure 2 are obtained by hard machining. As with the actuator shown in FIG. 1 , the rollers 18 and the threads of the screw 16 and nut 17 can be obtained by hard turning. The reference surface 23 of the flange 24 of the sleeve 12, which defines the position of the bearing 11, is also obtained in this way.

Claims (32)

1. actuator, it comprises a housing (1,10), a motor, an actuation element and a screw mechanism, in response to rotatablely moving of motor, screw mechanism makes actuation element with respect to housing (1,10) do linear movement, described screw mechanism comprises a screw rod (5,16) and a nut (1,17), at least one can pass through rolling element bearing (2 in the two, 11) with respect to housing (1,10) by rotatably mounted, described rolling element bearing (2,11) have an inside race (6) and an outer race, and the rolling element that contacts with the seat ring rolling, it is characterized in that at least one parts of screw mechanism such as screw rod (5,16), at least one parts of nut or roller (5,18) and/or bearing such as bearing inner ring or outer race comprise that one passes through as hard car, mill firmly, the surface portion that hard cutting operation such as hard lead processes.
2. actuator according to claim 1 is characterized in that described surface portion is used for the radial support screw mechanism.
3. actuator according to claim 1 and 2 is characterized in that described surface portion is used for the axially mounting screw mechanism.
4. according to claim 1,2 or 3 described actuators, it is characterized in that it comprises a gear reduction that links to each other with screw mechanism, this reducing gear comprise one by as the surface portion that processes of hard car, hard cutting operation such as mill firmly, hard lead.
5. according to the described actuator of above-mentioned arbitrary claim, it is characterized in that, at least one parts of screw mechanism such as screw rod, nut or roller, and/or at least one parts of bearing such as bearing inner ring or outer race, and/or at least one parts of gear reduction, comprise a surface portion that forms by grinding.
6. according to the described actuator of above-mentioned arbitrary claim, it is characterized in that, at least one parts of screw mechanism such as screw rod, nut or roller, and/or at least one parts of bearing such as bearing inner ring or outer race, and/or at least one parts of gear reduction, comprise a surface portion that processes by broaching.
7. according to the described actuator of above-mentioned arbitrary claim, it is characterized in that, at least one parts comprises a surface portion, for example screw thread, seat ring, the plane of reference or tooth, and it is by hard forging and/or roll firmly, the order manufacturing step of soft car, quenching and hard car obtains.
8. according to the described actuator of above-mentioned arbitrary claim, it is characterized in that at least a portion of at least one parts such as the acting surface of bearing race, is carried out surface modification treatment by for example grinding or apply diamond-like coating.
9. according to the described actuator of above-mentioned arbitrary claim, it is characterized in that at least a portion of at least one parts is obtained by metal or nonmetallic materials or sintered powder material.
10. according to the described actuator of above-mentioned arbitrary claim, it is characterized in that, at least a portion of at least one parts comprises a through hardening or surface hardening material, and it is by oil, salt bath quenching technology or flash quenching technology or adopt the quenching technology for surfaces of coating technology to obtain.
11., it is characterized in that at least a portion of at least one parts such as bearing race, utilizes polymer or flash quenching technology to carry out the sensitive surface Quenching Treatment according to the described actuator of above-mentioned arbitrary claim.
12., it is characterized in that the inside race of described bearing or a plane of reference that is meshed with a bearing inner ring that comprises described inside race and nut or screw rod are integral according to the described actuator of above-mentioned arbitrary claim.
13. actuator according to claim 12 is characterized in that, described nut by a rolling element bearing with respect to housing (4) by rotatably mounted, the interior ring of described bearing is with nut is integral or mesh with the plane of reference of nut.
14. according to claim 12 or 13 described actuators, it is characterized in that, described screw rod by a rolling element bearing with respect to housing (4) by rotatably mounted, the interior ring of described bearing is with nut is integral or mesh with the plane of reference of nut.
15., it is characterized in that described bearing inner ring and/or outer shroud comprise a groove that is used to hold a seal or protector according to the described actuator of above-mentioned arbitrary claim.
16. according to the described actuator of above-mentioned arbitrary claim, it is characterized in that nut or screw rod can comprise a transmission device, keyway for example, gear or tooth are to carry out direct or indirect engagement with power source.
17., it is characterized in that described bearing is a ball bearing according to the described actuator of above-mentioned arbitrary claim, for example 4 contact ball bearings, or roller bearing, for example needle bearing, roller bearing or taper roll bearing.
18., it is characterized in that described screw mechanism drives with screw rod or nut meshed gears reducing gear by one according to the described actuator of above-mentioned arbitrary claim.
19., it is characterized in that nut or screw rod comprise that one is used for the additional seat ring of a mechanical reduction gear block bearing according to the described actuator of above-mentioned arbitrary claim, this deceleration deceleration device meshes with a screw mechanism and a power source simultaneously.
20., it is characterized in that described screw mechanism comprises a ball screw or a roller-screw according to the described actuator of above-mentioned arbitrary claim.
21., it is characterized in that at least one parts of screw mechanism and/or bearing are made by carburizing steel according to the described actuator of above-mentioned arbitrary claim.
22., it is characterized in that at least one parts of screw mechanism and/or bearing are made by forged steel according to the described actuator of above-mentioned arbitrary claim.
23., it is characterized in that at least one parts of screw mechanism and/or bearing are made by the powder forming steel according to the described actuator of above-mentioned arbitrary claim.
24., it is characterized in that at least one parts of screw mechanism and/or bearing are made by steel rolling according to the described actuator of above-mentioned arbitrary claim.
25., it is characterized in that at least one parts of screw mechanism and/or bearing are made by cast steel according to the described actuator of above-mentioned arbitrary claim.
26., it is characterized in that at least one parts of screw mechanism and/or bearing are made by tool steel according to the described actuator of above-mentioned arbitrary claim.
27. a manufacturing is according to the method for the described actuator of above-mentioned any one claim, described actuator comprises a housing, a motor, an actuation element and a screw mechanism, in response to rotatablely moving of motor, screw mechanism makes actuation element do linear movement with respect to frame.Described screw mechanism comprises a screw rod and a nut, in the two at least one can by a rolling element bearing with respect to housing by rotatably mounted, described rolling element bearing has an inside race and an outer race, and the rolling element that contacts with described seat ring rolling, it is characterized in that, it comprises by for example hard car, mill firmly, hard cutting operation such as hard lead is made at least one parts such as screw rod in the screw mechanism, nut, retainer, cam, the surface portion of roller or ball, and/or the step of the surface portion of at least one parts of bearing such as bearing inner ring or outer race.
28. the method for manufacturing one actuator as claimed in claim 4 according to claim 27, it is characterized in that it comprises the step of surface portion of making at least one parts of gear reduction by hard car for example, hard cutting operation such as mill firmly, hard lead.
29. according to claim 27 or 28 described methods, it is characterized in that, it comprises the surface portion by at least one parts such as screw rod, nut, retainer, cam, roller or ball in the grinding manufacturing screw mechanism, and/or the surface portion of at least one parts of bearing such as bearing inner ring or outer race, and/or the step of the surface portion of at least one parts of gear reduction.
30. according to any one described method among the claim 27-29, it is characterized in that, it comprises the surface portion by at least one parts such as screw rod, nut, retainer, cam, roller or ball in the broaching manufacturing screw mechanism, and/or the surface portion of at least one parts of bearing such as bearing inner ring or outer race, and/or the step of the surface portion of at least one parts of gear reduction.
31., it is characterized in that it is included in screw rod or the nut step of the plane of reference of an inside race of making described bearing or a bearing inner ring according to any one described method among the claim 27-30.
32., it is characterized in that described hard car operation is what to be undertaken by the cutting head with at least two cutting tips of working simultaneously according to any one described method among the claim 27-31.
CN99804977A 1998-03-13 1999-03-12 Actuators with improved precision Pending CN1296660A (en)

Applications Claiming Priority (2)

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NL1008593A NL1008593C2 (en) 1998-03-13 1998-03-13 Actuator with improved accuracy.
NL1008593 1998-03-13

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CN1296660A true CN1296660A (en) 2001-05-23

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JP (1) JP2002506954A (en)
KR (1) KR20010041863A (en)
CN (1) CN1296660A (en)
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WO (1) WO1999046847A1 (en)

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AU2962999A (en) 1999-09-27
NL1008593C2 (en) 1999-09-14
EP1062721A1 (en) 2000-12-27
JP2002506954A (en) 2002-03-05
KR20010041863A (en) 2001-05-25
WO1999046847A1 (en) 1999-09-16

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