CN110691929A - Method for controlling an actuator - Google Patents

Method for controlling an actuator Download PDF

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Publication number
CN110691929A
CN110691929A CN201880035767.4A CN201880035767A CN110691929A CN 110691929 A CN110691929 A CN 110691929A CN 201880035767 A CN201880035767 A CN 201880035767A CN 110691929 A CN110691929 A CN 110691929A
Authority
CN
China
Prior art keywords
actuator
load
stroke
parameter
lubrication
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201880035767.4A
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Chinese (zh)
Inventor
米夏埃尔·罗伊舍尔
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of CN110691929A publication Critical patent/CN110691929A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • 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
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H2057/02039—Gearboxes for particular applications
    • F16H2057/02078—Gearboxes for particular applications for wind turbines
    • 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
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/26—Generation or transmission of movements for final actuating mechanisms
    • F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
    • F16H2061/2884—Screw-nut devices
    • 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
    • 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
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0463—Grease lubrication; Drop-feed lubrication
    • F16H57/0464—Grease lubrication
    • 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
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/048—Type of gearings to be lubricated, cooled or heated
    • F16H57/0497—Screw mechanisms

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)
  • General Details Of Gearings (AREA)

Abstract

A method for controlling an actuator that can be set in a lubricating position, wherein a load of the actuator is determined and the actuator is set in the lubricating position as a function of the load, is proposed in order to improve the method.

Description

Method for controlling an actuator
Technical Field
The invention relates to a method for controlling an actuator that can be set to a lubricating position.
Background
DE 102013219994 a1 discloses a threaded rod, in particular for the construction of a spindle drive of an actuator for actuating a disk brake, having a shaft body, an external thread projecting radially outward from the shaft body, wherein the external thread has a head side pointing away from the shaft body and two connection head sides and a tooth flank of the shaft body, wherein the shaft body forms a thread root between two successive tooth flanks, wherein a lubricant groove for transporting lubricant along the threaded rod is formed in the thread root, and/or wherein, in the state in which the external thread is screwed into a standard nut, a lubricant channel for transporting lubricant along the threaded rod is formed between the tooth flank and an internal thread of the standard nut.
Disclosure of Invention
The object of the invention is to improve a method of the type mentioned at the outset.
This object is achieved by a method having the features of claim 1. Preferred developments are the subject matter of the dependent claims.
The actuator may be used to convert an electrical signal into mechanical motion. The actuator may have an electric motor. The actuator may have an actuator transmission. An actuator transmission may be used to convert rotary motion to linear motion. The actuator may have an actuator housing. The actuator may have a planetary roller screw drive. The planetary roller spindle drive can have a spindle, a planetary roller and a spindle nut. The actuator may have at least one lubrication site. At least one lubrication point can be arranged between the two friction partners. At least one lubrication point can be arranged between the actuator housing and the spindle, between the spindle and the planetary rollers, between the planetary rollers and the spindle nut and/or between the spindle nut and the actuator housing. The actuator is adjustable between a first position and a second position. The adjustment travel between the first position and the second position may be a running adjustment travel. The operating setting stroke can be used for conventional actuator operation. The actuator may be adjusted from the first position and/or the second position to the lubrication position. In the lubrication position, at least one lubrication site may be loaded with a lubricant. The actuator may be used in a vehicle. The actuator may be used to operate the friction clutch. The actuator may be used to operate the variator.
The method may be performed by means of an electric control device. The electrical control device may have a computing device. The electrical control device may have a memory device. The electrical control device can be connected to the actuator in a signal-conducting manner. The control may be a control of a regulation technique. The control may be a control of a regulation technique.
The load of the actuator may be determined for determining the lubrication demand. The load of the actuator can be determined taking into account at least a parameter associated with the set stroke of the actuator. The load of the actuator can be determined taking into account the set stroke of the actuator. The set stroke can be detected by means of a sensor. The setup trip may be estimated. The setup stroke may be calculated.
The load of the actuator can be determined taking into account at least one further parameter. The at least one further parameter may be a temperature-dependent parameter. The at least one further parameter may be a parameter related to the set speed. The at least one further parameter may be a factor. The factor can have a value of between about 0.3 and about 3, in particular between about 0.5 and about 2, depending on the temperature and/or depending on the set speed. At least the parameter associated with the set stroke of the actuator and the at least one further parameter may be multiplied by each other.
The load-specific setting stroke of the actuator can be known. The load-specific setting stroke of the actuator can be integrated. The load-specific setting travel of the actuator can be detected cumulatively. The load-specific setting travel of the actuator can be compared with a preset limit value. The actuator can be set to the lubricating position when the load-specific setting travel of the actuator exceeds a predetermined limit value. The preset limit value may be a load-specific set travel limit value. The preset boundary value may be settable. As the actuator is set into the lubricating position, the load-specific setting stroke of the actuator can be reset.
Overall, and in other words, the invention therefore also provides a method for carrying out a load-specific lubrication cycle in an actuator. The lubrication cycle may also be referred to as a grease pick-up stroke (Fettholhub). The lubrication period may be based on negativeAnd (4) activating. The lubrication cycle can be defined by a special movement action of the actuator, for example the starting of a complete stroke, thereby ensuring that the lubricant is distributed uniformly again and thus fulfills its function in the actuator. This can be done depending on the load. The load of the actuator can be evaluated or determined here according to the following method: the quantities associated with the movement strokes can be used as a basis for the calculation. This may be, for example, the displacement travel of the actuator, which is available in the control device. In particular, when the load is also temperature-dependent, for example when the actuator load increases at higher temperatures, the stroke can be multiplied by a temperature-dependent factor which reflects the load. The background is that, for example, higher loads of the actuator occur in the case of high temperatures, so that the stroke passing there must be taken into account more. A further correlation may be the speed of movement, especially when the actuator load increases at a higher speed. The load-specific actuator stroke may then be calculated or integrated. If this value now reaches the specified mileage, a lubrication cycle can be initiated and the cumulative stroke sgesAgain, 0 may be set and thus the calculation may be restarted. Alternatively, instead of absolute values, a variable normalized to the maximum driving range may also be calculated. Instead of the stroke, the number of rolling elements rolling can likewise be counted as an indicator. If further load-specific characteristic variables, such as lifetime, humidity, are to function sgesShould be known, they can then be integrated into the function s according to the meaninggesIn (1).
With the invention, lubrication is effected on time before the functionality of the actuator is no longer ensured due to lack of lubrication. Irreversible damage is avoided. The operation safety is improved. The lubrication is carried out in a manner adapted to the actuator load.
Subsequently, embodiments of the present invention are described in detail with reference to the accompanying drawings. Additional features and advantages result from this description. Specific features of the embodiments may be common features of the invention. Features of the embodiments that are associated with other features may also be respective features of the invention.
Fig. 1 schematically and exemplarily shows a drive train 100 of a hybrid electric vehicle. The drive train 100 has a first drive machine 102, a friction clutch 104, a second drive machine 106, a transmission 108 and at least one drivable wheel 110. The first drive machine 102 is currently an internal combustion engine. The friction clutch 104 is used to disconnect/connect the first drive machine 102 from the drive train 100. The friction clutch 104 is used for starting with the first drive machine 102 and/or for shifting gear stages in the transmission 108. The friction clutch 104 can now be operated in an automated manner. The second drive machine 106 is currently an electric machine that can be operated as a motor. The transmission 108 can currently operate in an automated fashion. At least one wheel 110 can be driven by means of the first drive machine 102 and/or the second drive machine 106 in a selective or combined manner. The mechanical power of the first drive machine 102 and the mechanical power of the second drive machine 106 act additively on at least one wheel 110. Drive train 100 is also referred to as a parallel hybrid.
An actuator, which is not shown in detail here, is provided for actuating the friction clutch 104. The actuator is used to convert an electrical signal into a mechanical movement and has an actuator housing, an electric motor and an actuator gear. The actuator gear serves to convert the rotary motion of the electric motor into a linear actuating motion for the friction clutch 104. The actuator is embodied, for example, as an electric central separator with a planetary roller spindle drive having a spindle, planetary rollers and a spindle nut. The actuator has a travel setting stroke between a first position and a second position and can be set from the second position into a lubricating position in which a lubricating point of the actuator can be acted upon with a lubricant.
The actuator is controlled in a controlled and/or regulated manner by means of an electrical control device. In this case, the load of the actuator is determined and the actuator is set to the lubricating position as a function of the load. The load of the actuator is determined taking into account the cumulative set stroke of the actuator in order to ascertain the lubrication requirement. The setting stroke of the actuator is weighted by a factor dependent on the temperature and a factor dependent on the setting speed.
For example, the weighting with respect to temperature is performed according to the following table:
temperature of Factor A
-40 0.5
-10 0.5
0 0.8
20 1
80 1
140 2
For example, the weighting related to the set speed is performed according to the following table:
moving speed mm/s Factor B
0 1
2 1
5 1
10 1.5
20 1.75
50 2
Thus, a weighted setting stroke of the actuator is obtained, which is subsequently integrated into a load-specific setting stroke s of the actuatorges：
sges＝∫(s·FA·FB)
Wherein FA is factor A and FB is factor B.
Load-specific setting stroke s of an actuatorgesAnd comparing with a preset boundary value. When the load of the actuator is specified by the set stroke sgesWhen a predetermined limit value is exceeded, the actuator is set to the lubricating position and the load-specific setting stroke s of the actuator is setgesIs reset. A new cycle follows.
List of reference numerals
100 drive train
102 first drive machine
104 friction clutch
106 second drive machine
108 speed changer
110 wheel

Claims (10)

1. A method for controlling an actuator that can be set in a lubricating position, characterized in that a load of the actuator is determined and the actuator is set in the lubricating position as a function of the load.
2. Method according to claim 1, characterized in that the load of the actuator is determined taking into account at least a parameter associated with the set stroke of the actuator.
3. Method according to at least one of the preceding claims, characterized in that the load of the actuator is determined taking into account the setting stroke of the actuator.
4. Method according to at least one of the preceding claims, characterized in that the load of the actuator is determined taking into account at least one further parameter.
5. The method according to claim 4, characterized in that the at least one further parameter is a temperature-dependent parameter.
6. Method according to at least one of the claims 4 to 5, characterized in that the at least one further parameter is a parameter related to a set speed.
7. Method according to claim 2 or 3 and at least one of claims 4 to 6, characterized in that the parameter at least associated with the setting stroke of the actuator and the at least one further parameter are multiplied with each other.
8. Method according to at least one of the preceding claims, characterized in that a load-specific setting stroke of the actuator is known and/or integrated.
9. The method according to claim 8, characterized in that the load-specific set stroke of the actuator is compared with a preset boundary value and the actuator is set to the lubricating position when the load-specific set stroke of the actuator exceeds the preset boundary value.
10. Method according to at least one of claims 8 to 9, characterized in that the load-specific setting stroke of the actuator is reset as the actuator is set into the lubricating position.
CN201880035767.4A 2017-05-30 2018-05-08 Method for controlling an actuator Pending CN110691929A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102017111748.2A DE102017111748A1 (en) 2017-05-30 2017-05-30 Method for controlling an actuator
DE102017111748.2 2017-05-30
PCT/DE2018/100431 WO2018219387A1 (en) 2017-05-30 2018-05-08 Method for controlling an actuator

Publications (1)

Publication Number Publication Date
CN110691929A true CN110691929A (en) 2020-01-14

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CN201880035767.4A Pending CN110691929A (en) 2017-05-30 2018-05-08 Method for controlling an actuator

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CN (1) CN110691929A (en)
DE (2) DE102017111748A1 (en)
WO (1) WO2018219387A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019206913B3 (en) * 2019-05-13 2020-02-20 Zf Friedrichshafen Ag Method for lubricating a movement thread of a steer-by-wire steering device and steer-by-wire steering device

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1326537A (en) * 1998-11-17 2001-12-12 Skf工程研究中心公司 Screw actuator with lubricant dosing and brake calliper
US20050143224A1 (en) * 2003-10-15 2005-06-30 Takashi Aoki Hydraulic controller for hydraulic actuator
CN101008444A (en) * 2006-01-27 2007-08-01 株式会社日立制作所 Control device and control method for vehicle
CN101946105A (en) * 2008-03-04 2011-01-12 博格华纳公司 Dual clutch transmission having area controlled clutch cooling circuit
CN101946106A (en) * 2007-12-19 2011-01-12 萨基姆防务安全公司 Rotolinear actuator with satellite rollers
CN103561982A (en) * 2011-02-01 2014-02-05 捷豹路虎有限公司 Hybrid electric vehicle controller and method of controlling hybrid electric vehicle
DE102013206162A1 (en) * 2013-04-08 2014-10-09 Weber Maschinenbau Gmbh Breidenbach Traversing carriage for a linear guide
CN106415070A (en) * 2013-11-25 2017-02-15 斯凯孚公司 Linear electro-mechanical actuator

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010044793B4 (en) * 2010-09-09 2013-10-31 Parker Hannifin Gmbh Electromechanical linear drive with regreasing device
DE102013219994A1 (en) 2013-10-02 2015-04-02 Schaeffler Technologies Gmbh & Co. Kg Threaded rod, nut and method for producing a threaded rod and / or for producing a nut

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1326537A (en) * 1998-11-17 2001-12-12 Skf工程研究中心公司 Screw actuator with lubricant dosing and brake calliper
US20050143224A1 (en) * 2003-10-15 2005-06-30 Takashi Aoki Hydraulic controller for hydraulic actuator
CN101008444A (en) * 2006-01-27 2007-08-01 株式会社日立制作所 Control device and control method for vehicle
US20070175720A1 (en) * 2006-01-27 2007-08-02 Hitachi, Ltd. Control device and control method for vehicle
CN101946106A (en) * 2007-12-19 2011-01-12 萨基姆防务安全公司 Rotolinear actuator with satellite rollers
CN101946105A (en) * 2008-03-04 2011-01-12 博格华纳公司 Dual clutch transmission having area controlled clutch cooling circuit
CN103561982A (en) * 2011-02-01 2014-02-05 捷豹路虎有限公司 Hybrid electric vehicle controller and method of controlling hybrid electric vehicle
DE102013206162A1 (en) * 2013-04-08 2014-10-09 Weber Maschinenbau Gmbh Breidenbach Traversing carriage for a linear guide
CN106415070A (en) * 2013-11-25 2017-02-15 斯凯孚公司 Linear electro-mechanical actuator

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DE102017111748A1 (en) 2018-12-06
DE112018002757A5 (en) 2020-02-20
WO2018219387A1 (en) 2018-12-06

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