WO2011124198A1 - Linear-travel measuring system - Google Patents
Linear-travel measuring system Download PDFInfo
- Publication number
- WO2011124198A1 WO2011124198A1 PCT/DE2011/000298 DE2011000298W WO2011124198A1 WO 2011124198 A1 WO2011124198 A1 WO 2011124198A1 DE 2011000298 W DE2011000298 W DE 2011000298W WO 2011124198 A1 WO2011124198 A1 WO 2011124198A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- magnet
- piston
- sleeve
- joint
- linearwegmesssystem
- Prior art date
Links
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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D25/00—Fluid-actuated clutches
- F16D25/12—Details not specific to one of the before-mentioned types
-
- 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
- F16D2300/00—Special features for couplings or clutches
- F16D2300/18—Sensors; Details or arrangements thereof
Definitions
- the invention relates to a Linearwegmesssystem with a sensor device and with a magnet which is mechanically connected to a piston to detect an axial position of the piston.
- a Gottitzer with a position measuring system which comprises a sensor arranged in a housing, which is associated with an axially displaceably guided magnet, which by means of an elastic E- iements in operative connection with a on the piston attached inner ring of a release bearing is.
- the object of the invention is to improve the mechanical connection of the magnet to the piston in a Linearwegmesssystem according to the preamble of claim 1.
- the object is in a Linearwegmesssystem with a sensor device and with a magnet which is mechanically connected to a piston to detect an axial position of the piston, achieved in that the magnet is connected via a hinge to the piston.
- the position of the magnet provides information about the piston position for the sensor device. Linear motion of the piston is transmitted to the magnet via the joint. Due to the articulated connection between the magnet and the piston, high requirements in terms of robustness, wear resistance and magnetic freedom from interference can be met in a simple manner.
- a preferred embodiment of the Linearwegmesssystems is characterized in that the joint is designed as a ball joint.
- the ball joint preferably comprises a spherical end, which is received in a kind of socket, and allows for the transfer of axial movements compensation of radial tolerances.
- a further preferred embodiment of the Linearwegmesssystems is characterized in that the joint comprises a spherical end which is connected to a piston plunger.
- the piston plunger which can also be designed or designated as a piston rod, is attached to a piston such that axial movements of the piston Bens be transferred to the piston plunger.
- the piston plunger preferably extends in the direction of movement of the piston.
- the spherical end is preferably integrally connected to the piston plunger.
- a further preferred embodiment of the Linearwegmesssystems is characterized in that between the spherical end and the magnet, a spring device is clamped.
- the spring device is preferably designed as a compression spring, in particular as a helical compression spring.
- the joint is elastically biased in the axial direction. Due to the elastic bias can be compensated during permanent cycles joint wear. Thereby, the accuracy of the Linearwegmesssystems be improved.
- the elastic bias is preferably designed taking into account dynamics of the linear displacement measuring system and environmental vibrations. According to a further aspect of the invention, the elastic bias can also be generated without spring means by the joint is molded with plastic, for example.
- a further preferred embodiment of the Linearwegmesssystems is characterized in that the spherical end of the piston plunger, at least partially, is encompassed by one end of a sleeve, which surrounds the magnet, at least partially.
- the sleeve preferably has substantially the shape of a straight circular cylinder jacket which surrounds the magnet.
- a further preferred embodiment of the Linearwegmesssystems is characterized in that the sleeve is closed at its end facing away from the joint or has radially inwardly angled stop tabs for the magnet. Thereby, the magnet is fixed in an axial direction away from the hinge. Axial means in the direction of movement of the piston.
- a further preferred embodiment of the Linearwegmesssystems is characterized in that the sleeve is designed at its end facing the joint so that it surrounds a spherical joint part or the spherical end of the piston plunger.
- the sleeve is preferably designed at its two ends so that the magnet is biased in the sleeve against the spherical hinge part or the spherical end of the piston plunger.
- a further preferred embodiment of the Linearwegmesssystems is characterized in that the sleeve is formed of a non-magnetic metal and is deformed at its end facing the joint so that it surrounds the spherical joint part or the spherical end of the piston plunger.
- the sleeve may be formed of, for example, an aluminum material or a stainless steel material.
- the sleeve is formed of plastic and injected at its end facing the joint to the spherical hinge part or the spherical end of the piston plunger and the magnet.
- the spherical joint part or the spherical end of the piston plunger and / or the magnet can be designed as inserts, which are encapsulated in an injection mold with plastic.
- the spherical joint part or the spherical end of the piston tappet may also be formed from plastic and represent parts of a multi-component injection molded part with magnet inserted.
- Linearwegmesssystems Another preferred embodiment of the Linearwegmesssystems is characterized in that the sleeve is guided in a guide tube movable back and forth.
- the guide tube may be formed of metal and centered on a housing of the Linearwegmesssystems.
- the guide tube can also be integrally connected to the housing of the Linearwegmesssystems.
- the invention relates to a clutch actuator, preferably a hydrostatic clutch actuator, with a previously described linear displacement measuring system.
- a clutch actuator preferably a hydrostatic clutch actuator
- the construction and the function of the clutch actuator are described, for example, in German Offenlegungsschrift DE 10 2008 044 823 A1.
- Figure 1 shows an embodiment of a Linearwegmesssystems invention
- Figure 2 shows the sleeve with the magnet of Figure 1 in two different perspective
- Figure 3 is a similar view as in Figure 2 according to another embodiment in three different perspective views and
- Figure 4 shows a detail of Figure 1 according to another embodiment with a
- FIG. 1 shows a Linearwegmesssystem 1 with a sensor device 2 and a housing 4 is shown in section.
- a circuit board 5 is arranged with a linear sensor 6.
- the linear sensor 6 cooperates with a magnet 8 which is movable in response to the movement of a (not shown) piston in the axial direction, that is, in Figure 1 parallel to the circuit board 5, back and forth.
- the magnet 8 has the shape of a straight circular cylinder with a north pole at a first end 11 and a south pole at a second end 12.
- the first end 11 of the magnet 8 is formed as a kind of socket on which abuts a spherical end 14 of a piston plunger 15 ,
- the spherical end 14 is integrally connected in the illustrated embodiment with the piston plunger 15.
- the piston plunger 15 is attached to the piston 8 at its other end (not shown).
- the sleeve 20 is formed of a non-magnetic metal, such as aluminum, and has substantially the shape of a straight hollow cylinder shell, which is partially closed at one end by the stop tabs 16, 17. At its other end, the hollow cylinder shell is open.
- the piston plunger 15 extends toward the magnet 8, which is arranged in the sleeve 20.
- the spherical end 14 of the piston plunger 15, together with the joint cup-like end 11 of the magnet 8 and / or the sleeve 20 is an inventive joint.
- the sleeve 20 has at its open end an abutment portion 21, in which the sleeve 20 rests against the spherical end 14 of the piston plunger 15.
- the contact section 21 merges into a fixing section 22, in which the sleeve 20 is deformed or partially deformed in such a way that it encompasses the spherical end 14 of the piston plunger 15.
- the magnet 8 with the aid of the fixing section 22 in axial Rieh- tion between the spherical end 14 of the piston plunger 15 and the stop tabs 16, 17 clamped in the sleeve 20.
- the clamping ensures that the connection between the spherical end 14 of the piston plunger 15 and the magnet 8 is free of play.
- the sleeve 20 is guided with the accommodated therein spherical end 14 and the magnet 8 in a guide tube 24 movable back and forth.
- the guide tube 24 has the shape of a straight circular cylinder jacket and is centered at one end in a centering 25 on the housing 4.
- the housing 4 is formed, for example, of plastic, while the guide tube 24 is formed of a non-magnetic metal, such as aluminum or stainless steel.
- the sleeve 20 is shown with the magnet 8 received therein and the spherical end 14 of the piston plunger 15 in perspective in the assembled state and in longitudinal section. In longitudinal section, it can be seen that the sleeve 20 surrounds the piston 15 at the transition to the spherical end 14 with the fixing portion 22 in an annular manner. Characterized the magnet 8 is stably clamped between the spherical end 14 and the stop tabs 16, 17.
- FIG. 3 shows a similar exemplary embodiment as in FIG. 2 with a sleeve 30 made of a plastic material.
- the sleeve 30 is preferably designed as an injection molded part with a closed end 31 and a contact and fixing section 32 at its other end.
- the closed end 31 represents a stop for the magnet 8 applied thereto.
- the abutment and fixing portion 32 surrounds the spherical end 14 of the piston plunger 15 articulated so that the magnet 8 between the spherical end 14 of the piston plunger 15 and the closed end 31 of the sleeve 30 is clamped.
- the abutment and fixing section 32 of the sleeve 30 is provided with axially extending slots 34 which divide the abutment and fixing section 32 into a plurality of axial and fixing lugs 35.
- the axial and fixation 35 are slightly movable in the radial direction and biased against the spherical end 14 of the piston plunger 15.
- FIG. 4 shows a similar exemplary embodiment as in FIG. 1, in which a spring device 42 is arranged between an end 41 of the magnet 8 facing the spherical end 14 of the piston plunger 15 and the spherical end 14.
- the spring device 42 is designed as a helical compression spring and clamped in the axial direction under bias between the spherical end 14 of the piston plunger 15 and the magnet 8.
- the spherical end 14 of the piston plunger 15 has a shoulder 44, which serves to receive and fix an end turn of the spring device 42.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112011101226.8T DE112011101226B4 (en) | 2010-04-08 | 2011-03-21 | Linearwegmesssystem |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010014196.8 | 2010-04-08 | ||
DE102010014196 | 2010-04-08 | ||
DE102010024445 | 2010-06-21 | ||
DE102010024445.7 | 2010-06-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011124198A1 true WO2011124198A1 (en) | 2011-10-13 |
Family
ID=44170319
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2011/000298 WO2011124198A1 (en) | 2010-04-08 | 2011-03-21 | Linear-travel measuring system |
Country Status (2)
Country | Link |
---|---|
DE (2) | DE102011014574A1 (en) |
WO (1) | WO2011124198A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015192843A1 (en) * | 2014-06-16 | 2015-12-23 | Schaeffler Technologies AG & Co. KG | Master cylinder for a clutch disengagement system |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012219173A1 (en) | 2012-10-22 | 2014-04-24 | Schaeffler Technologies Gmbh & Co. Kg | Sensor system and piston-cylinder assembly, in particular for use in a clutch actuation system in a motor vehicle |
DE102012223736A1 (en) | 2012-12-19 | 2014-06-26 | Schaeffler Technologies Gmbh & Co. Kg | Piston-cylinder arrangement for use in clutch actuating system in motor vehicle, has sensor system fixed on piston and executes movement of piston and is fastened to cylinder |
DE102014211146A1 (en) | 2013-07-03 | 2015-01-08 | Schaeffler Technologies Gmbh & Co. Kg | Piston-cylinder arrangement, in particular for a release system in a motor vehicle |
DE102014225658A1 (en) | 2014-12-12 | 2016-06-16 | Schaeffler Technologies AG & Co. KG | Method and measuring system for sensing a rotational and linear movement in a switching actuator |
DE102015210100A1 (en) | 2015-06-02 | 2016-12-08 | Schaeffler Technologies AG & Co. KG | Pressure cylinder with centering ring as a plastic-bonded magnet |
DE102016204890A1 (en) | 2016-03-23 | 2017-09-28 | Schaeffler Technologies AG & Co. KG | A method of adjusting a magnetic sensor device to an actuator and actuator with an electric motor and a magnetic sensor device |
DE102018001753B3 (en) * | 2018-03-06 | 2019-08-29 | Fte Automotive Gmbh | Central release for a pneumatic clutch operation |
DE102018001756B4 (en) | 2018-03-06 | 2020-01-23 | Fte Automotive Gmbh | Central release for pneumatic clutch actuation |
DE102020201278A1 (en) | 2020-02-03 | 2021-08-05 | Zf Friedrichshafen Ag | Position measuring device for measuring a position of a piston with respect to a cylinder along an axial direction, release system for actuating a clutch |
DE102020201276A1 (en) | 2020-02-03 | 2021-08-05 | Zf Friedrichshafen Ag | Release system for actuating a clutch, displacement measuring device for measuring a position of a piston in an axial direction |
DE102021132545A1 (en) | 2021-12-09 | 2023-06-15 | Svm Schultz Verwaltungs-Gmbh & Co. Kg | locking unit |
WO2023217314A1 (en) * | 2022-05-10 | 2023-11-16 | Schaeffler Technologies AG & Co. KG | Actuator |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE20308810U1 (en) * | 2003-05-23 | 2003-08-28 | ZF Sachs AG, 97424 Schweinfurt | Piston-cylinder unit, especially for a motor vehicle braking system or hydraulic coupling, has a permanent magnet mounted on a support surface on the piston with a securing element to secure it axially |
EP1391615A2 (en) * | 2002-08-22 | 2004-02-25 | ZF Sachs AG | Piston-cylinder unit |
DE102008044823A1 (en) | 2007-09-10 | 2009-03-12 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Method for controlling a friction clutch |
DE102008057107A1 (en) * | 2007-11-19 | 2009-05-20 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Position measuring system for clutch disengaging system in motor vehicle, has fastening element comprising plugging region gripped by through-hole formed in magnet and pluggable into mounting hole |
DE102009032831A1 (en) | 2008-07-28 | 2010-02-04 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Central shifter for use in hydraulic coupling system, has magnet axially and adjustably guided and accommodated in recess of housing and staying in operative connection with inner ring by flexible element e.g. compression spring |
-
2011
- 2011-03-21 WO PCT/DE2011/000298 patent/WO2011124198A1/en active Application Filing
- 2011-03-21 DE DE201110014574 patent/DE102011014574A1/en not_active Withdrawn
- 2011-03-21 DE DE112011101226.8T patent/DE112011101226B4/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1391615A2 (en) * | 2002-08-22 | 2004-02-25 | ZF Sachs AG | Piston-cylinder unit |
DE20308810U1 (en) * | 2003-05-23 | 2003-08-28 | ZF Sachs AG, 97424 Schweinfurt | Piston-cylinder unit, especially for a motor vehicle braking system or hydraulic coupling, has a permanent magnet mounted on a support surface on the piston with a securing element to secure it axially |
DE102008044823A1 (en) | 2007-09-10 | 2009-03-12 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Method for controlling a friction clutch |
DE102008057107A1 (en) * | 2007-11-19 | 2009-05-20 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Position measuring system for clutch disengaging system in motor vehicle, has fastening element comprising plugging region gripped by through-hole formed in magnet and pluggable into mounting hole |
DE102009032831A1 (en) | 2008-07-28 | 2010-02-04 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Central shifter for use in hydraulic coupling system, has magnet axially and adjustably guided and accommodated in recess of housing and staying in operative connection with inner ring by flexible element e.g. compression spring |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015192843A1 (en) * | 2014-06-16 | 2015-12-23 | Schaeffler Technologies AG & Co. KG | Master cylinder for a clutch disengagement system |
CN106460961A (en) * | 2014-06-16 | 2017-02-22 | 舍弗勒技术股份两合公司 | Active cylinder for clutch release system |
CN106460961B (en) * | 2014-06-16 | 2019-02-22 | 舍弗勒技术股份两合公司 | Active cylinder for clutch release system |
Also Published As
Publication number | Publication date |
---|---|
DE112011101226A5 (en) | 2013-01-24 |
DE112011101226B4 (en) | 2018-07-19 |
DE102011014574A1 (en) | 2011-12-15 |
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