EP2257712A1 - Zylinder - Google Patents
ZylinderInfo
- Publication number
- EP2257712A1 EP2257712A1 EP09722753A EP09722753A EP2257712A1 EP 2257712 A1 EP2257712 A1 EP 2257712A1 EP 09722753 A EP09722753 A EP 09722753A EP 09722753 A EP09722753 A EP 09722753A EP 2257712 A1 EP2257712 A1 EP 2257712A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder
- adapter
- cylinder rod
- sensor magnet
- sensor
- 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.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000007789 sealing Methods 0.000 description 3
- 101100190615 Mus musculus Plcd1 gene Proteins 0.000 description 2
- 101100408448 Mus musculus Plcd4 gene Proteins 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/28—Means for indicating the position, e.g. end of stroke
- F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1447—Pistons; Piston to piston rod assemblies
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/28—Means for indicating the position, e.g. end of stroke
- F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
- F15B15/2861—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using magnetic means
Definitions
- the invention relates to a cylinder with a running in a cylinder housing piston which is fixed to a cylinder rod and rotatable about a cylinder axis, and a position sensor which comprises a sensor magnet and a sensor element which cooperates with the sensor magnet, wherein the sensor magnet is formed for Detecting a cylinder rod position relative to the cylinder housing.
- a position sensor which comprises a sensor magnet and a sensor element which cooperates with the sensor magnet, wherein the sensor magnet is formed for Detecting a cylinder rod position relative to the cylinder housing.
- adjacently arranged sensors can be disturbed by the partial magnets.
- Such a piston is known for example from DE 20 2005 005 508 U1.
- complementary magnet parts are arranged on the piston to a magnetic ring whose magnetic field is detected by a magnetic field sensor.
- a disadvantage of the piston is its high production costs.
- the invention has for its object to provide an easy-to-manufacture cylinder, which is also easy to maintain and surrounding sensors less influenced.
- the invention solves the problem by a generic cylinder, in which the sensor magnet with respect to the cylinder rod rotatably mounted on the cylinder rod and is rotatably guided relative to the cylinder housing.
- a cylinder rod is understood to mean in particular each component, which is fixedly coupled to the piston with respect to the actuating direction of the piston.
- the cylinder rod may comprise a plurality of partial cylinder rods which are shear stable or secured by joints together.
- a free rotation for example by several turns is not possible.
- pivoting about a small angular range for example less than 20 °, may be possible.
- the sensor magnet extends only over a fraction of a cylinder rod circumferential angle of the cylinder rod. Since the sensor magnet is rotatably guided with respect to the cylinder housing, it is only necessary that the sensor magnet is always facing the sensor element. On a side facing away from the sensor element of the cylinder rod no magnetic element is necessary and possibly even harmful, since surrounding sensors can be influenced.
- the advantage of this is that the magnetic E lement is small and therefore inexpensive to produce.
- Another advantage is that the magnetic field surrounding the sensor magnet is present only in the immediate vicinity of the sensor element. This avoids magnetic interference that can otherwise interfere with other nearby sensors. It is also advantageous that a small sensor magnet is less affected by external magnetic fields, which in turn increases the measurement accuracy.
- the sensor magnet extends over less than a third, in particular less than a fifth, of the cylinder rod circumferential angle of the cylinder rod. It is even possible for the sensor magnet to extend over less than 70 ° or even less than 45 ° above the cylinder rod circumferential angle. A particularly easy to manufacture sensor magnet is obtained if this is circular segment-shaped. It is particularly advantageous because such a sensor magnet builds radially particularly small for a given magnetic field strength.
- a structurally particularly simple piston is obtained when the sensor magnet is fastened to an adapter, wherein the adapter is free of magnetized material on a side remote from the sensor element and fixed in relation to the cylinder rod longitudinal direction in at least one direction immovably on the cylinder rod.
- the adapter is free of magnetized material on a side facing the sensor element, spatially extended magnetic fields are avoided, which can disturb magnetically positioned magnetic field sensors.
- the cylinder can also be manufactured particularly easily at low cost.
- the adapter is mounted displaceably on the cylinder rod in at least one direction with respect to the cylinder rod longitudinal direction, it is to be understood in particular that a movement of the piston in at least one direction always leads to a movement of the adapter in the same direction. In other words, the adapter is carried along in at least one direction by the cylinder rod.
- the adapter is guided around the cylinder rod longitudinal direction in a rotationally secure manner in a guide sleeve.
- the guide sleeve rests relative to the cylinder housing, so that the adapter can perform relative to the cylinder housing no rotational movement.
- a pivoting movement by a few degrees may be possible.
- the cylinder housing and the guide sleeve are directly connected.
- the cylinder housing and the guide sleeve are fastened together on a third object.
- the adapter has a guide groove, in which a guide projection of the guide sleeve engages.
- the adapter has a guide projection which engages in a recess in the guide sleeve.
- the cylinder rod has a stop for the adapter, wherein the piston comprises a relative to the cylinder housing against rotation secured spring, in particular a coil spring, which biases the adapter to the stop.
- the adapter is secured against rotation on the spring, so that the adapter is rotatable relative to the cylinder housing.
- the coil spring surrounds the cylinder rod and attached to the adapter, for example clipped.
- the coil spring is then rotatably mounted relative to the cylinder housing.
- the adapter can perform so small pivoting movements about the cylinder rod longitudinal axis, but is always pushed back by the spring in a rest position. This design has the advantage of being particularly easy to manufacture and maintain.
- the cylinder may preferably be designed for switching an alley of the transmission.
- a transmission actuator neither a lane rod, which is used to switch the alley, nor the cylinder to be actuated to be rotatably formed.
- ring magnets are provided which cooperate with the sensor element.
- these ring magnets can influence surrounding sensors, for example, a gear sensor for determining a gear position of the transmission or a split sensor for determining a switching position of a split stage of the transmission.
- the position sensor is designed as a gas sensor, which detects a position of a throttle bar of the transmission.
- the sensor magnet is a gas sensor magnet and the sensor element is a gas sensor element.
- the sensor elements are preferably magnetic-inductive sensor elements, in particular PLCD sensor elements (PLCD, permanent magnetic linear contact-less displacement, linear, contactless displacement sensors with permanent magnets).
- FIG. 1 shows a cross section through a cylinder according to the invention
- FIG. 2 shows an exploded view of the cylinder according to FIG. 1,
- FIG. 3 shows a side view of a part of the components of a cylinder according to the invention according to a second embodiment
- Figure 4 shows a second embodiment of a cylinder according to the invention
- FIG. 5 shows a detail cross-sectional view of the cylinder according to FIG. 4.
- Figure 1 shows a cylinder 10 with a running in a cylinder housing 12 piston 14 which is fixed to a cylinder rod 16 and rotatably mounted about a cylinder rod longitudinal axis L.
- the cylinder 10 also includes a position sensor 18 that includes a sensor magnet 20 and a sensor element 22 that cooperates with the sensor magnet 20.
- the position sensor 18 is configured to measure the position of the piston 14 at a height to the cylinder rod longitudinal axis L.
- the piston 14 is rotatable relative to the cylinder housing 12 about the longitudinal axis L by a rotational angle ⁇ .
- the sensor magnet 20 is always arranged relative to the cylinder housing 12 with respect to the sensor element 22 by being arranged rotationally fixed with respect to the cylinder housing 12.
- the sensor magnet 20 is attached to an adapter 24.
- the sensor magnet 20 is injected in the adapter 24, glued or clipped.
- the piston 14 and the cylinder rod 16 are rotatable relative to the adapter 24.
- the adapter 24 is displaceably mounted on the cylinder rod 16 in the first direction R 1 along the longitudinal axis of the cylinder rod L.
- the adapter 24 surrounds the cylinder rod 16 annularly and forms a clearance 26 with the cylinder rod 16.
- the adapter 24 is not movable relative to the piston 14 because it abuts against a stop 28 formed by a surface of the piston 14.
- the adapter 24 is a plastic injection-molded part, which is non-magnetic and unmagnetisable bar, so that only in an environment of the sensor magnet 20, a permanent magnetic field exists.
- the sensor element 22 is designed to measure this magnetic field in a spatially resolved manner along the cylinder longitudinal axis L and to determine therefrom the position of the piston 14.
- a coil spring 30 is mounted, for example, clipped.
- the coil spring is non-rotatably attached to the adapter 24.
- the coil spring 30 With its end facing away from the adapter 24, the coil spring 30 is rotatably mounted in a receiving groove 32 on the cylinder housing 14.
- the sensor magnet 20 can thereby pivot about the cylinder longitudinal axis L, but is always returned to a predetermined rotational angle position by the helical spring 30.
- Figure 2 shows an exploded view of the arranged in the cylinder housing 12 components, wherein a sealing rubber 34 of the piston 14 can be seen. It can be seen that the sensor magnet 20 extends only by a fraction of a cylinder rod circumferential angle of the cylinder rod 16. In other words, a plurality of sensor magnets 20 could be arranged in the circumferential direction one behind the other until the cylinder rod 16 would be completely surrounded radially by sensor magnets 20. The determination of the cylinder rod circumferential angle is explained in more detail below in connection with FIG.
- FIG. 3 shows the components of a second embodiment of a cylinder according to the invention.
- the cylinder rod 16 unlike the embodiment according to FIG. 2, neither passes through the adapter 24 nor the coil spring 30.
- the adapter 24 is provided with the sensor magnet 20 and the spiral spring 30 arranged in the cylinder housing 12.
- adapter 24 and coil spring 30 are arranged outside of the cylinder housing 12.
- Figure 4 shows another embodiment of a cylinder according to the invention, wherein the cylinder housing 12 has been omitted for clarity.
- the cy Linderstange 16 passes through the adapter 24, which supports the circular segment-shaped sensor magnet 20.
- the adapter 24 has a sensor magnet holder 36 and a clamping projection 38.
- the sensor magnet 20 is received in the sensor magnet holder 36 and is held by the clamping projection 38.
- the adapter 24 is in turn pivotable about the rotational angle ⁇ freely about the cylinder rod longitudinal axis L of the cylinder rod 16.
- the sensor magnet 20 also extends over a cylinder rod circumferential angle ⁇ , which is determined as outlined.
- a measuring plane E is spanned, through which the cylinder rod longitudinal axis L extends.
- the cylinder rod circumferential angle ⁇ is the angle existing between two planes E that just touch the outer sides of the sensor magnet 20. The smaller the cylinder rod circumferential angle ⁇ , the less any surrounding sensors are adversely affected by stray fields. In FIG. 4, ⁇ is about 90 °.
- the adapter 24 has a guide groove 40 into which a guide nose 42 (see FIG. 4
- the adapter 24 is fixedly connected to the Koiben 14 via a screw 46 and thus immovable relative to the piston 14.
- the piston 14 is rotatable relative to the piston rod 16, so that the adapter z24 is also rotatable with respect to the cylinder axis.
- the cylinder rod 16 is rotatable with respect to the adapter 24 and thus with respect to the sensor magnet 20th
- FIG. 5 shows a cross section through the cylinder 10, the inner components of which are shown in FIG. It can be seen that the guide sleeve 44 is attached to one end of the cylinder housing 14 and is sealed with respect to this with an O-ring 48.
- the sealing rubber 34 is attached directly to the piston 14.
- the adapter 24 is rotatable relative to the piston 14, so that the piston can rotate in the cylinder housing 12, without the sensor magnet 20 moves away from its position relative to the sensor element 22 , It is also possible that the adapter 24 is an integral part of the piston 14. By engaging the guide lug 42 in the guide groove 40 of the adapter 24, the cylinder rod 16 can rotate freely with respect to the cylinder housing and yet the sensor magnet is rotationally fixed relative to the cylinder housing 12 out.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008014506A DE102008014506A1 (de) | 2008-03-15 | 2008-03-15 | Zylinder |
PCT/EP2009/000731 WO2009115168A1 (de) | 2008-03-15 | 2009-02-04 | Zylinder |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2257712A1 true EP2257712A1 (de) | 2010-12-08 |
EP2257712B1 EP2257712B1 (de) | 2012-10-31 |
Family
ID=40613022
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09722753A Active EP2257712B1 (de) | 2008-03-15 | 2009-02-04 | Zylinder |
Country Status (7)
Country | Link |
---|---|
US (1) | US8833234B2 (de) |
EP (1) | EP2257712B1 (de) |
JP (1) | JP5605851B2 (de) |
CN (1) | CN101952606B (de) |
DE (1) | DE102008014506A1 (de) |
ES (1) | ES2397506T3 (de) |
WO (1) | WO2009115168A1 (de) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004050269A1 (de) * | 2004-10-14 | 2006-04-20 | Institut Für Solarenergieforschung Gmbh | Verfahren zur Kontakttrennung elektrisch leitfähiger Schichten auf rückkontaktierten Solarzellen und Solarzelle |
DE102014011176A1 (de) * | 2014-07-31 | 2016-02-04 | Fte Automotive Gmbh | Hydraulische Betätigungsvorrichtung für die Betätigung von Stellgliedern in einem Kraftfahrzeuggetriebe |
DE102014011177A1 (de) * | 2014-07-31 | 2016-02-04 | Fte Automotive Gmbh | Hydraulische oder pneumatische Betätigungsvorrichtung für die Betätigung von Stellgliedern in einem Kraftfahrzeuggetriebe |
CN106555699B (zh) * | 2015-09-30 | 2020-11-13 | 北京宝沃汽车有限公司 | 活塞装置及测试发动机缸孔变形的*** |
DE102015116654B4 (de) * | 2015-10-01 | 2021-12-02 | Hugo Benzing Gmbh & Co. Kg | Parksperreneinheit |
DE102016207982B4 (de) | 2016-05-10 | 2018-03-15 | Festo Ag & Co. Kg | Stellvorrichtung |
JP6910978B2 (ja) * | 2018-03-09 | 2021-07-28 | Ckd株式会社 | ピストン位置検出装置 |
DE102018216219B4 (de) * | 2018-09-24 | 2021-01-28 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Positionsmesssystem |
DE102018123767A1 (de) * | 2018-09-26 | 2020-03-26 | effexx Kommunikations- und Meldesysteme GmbH & Co. KG | Sensor, insbesondere ausgebildet als Brandmelder |
WO2020231974A1 (en) | 2019-05-13 | 2020-11-19 | Milwaukee Electric Tool Corporation | Contactless trigger with rotational magnetic sensor for a power tool |
DE202020104419U1 (de) | 2020-07-30 | 2021-08-02 | Hugo Benzing Gmbh & Co. Kg | Parksperreneinheit |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0275901A (ja) * | 1988-09-13 | 1990-03-15 | Jidosha Kiki Co Ltd | ストロークセンサ |
JPH04119258A (ja) * | 1990-09-04 | 1992-04-20 | Jidosha Kiki Co Ltd | 変速機操作装置 |
DE4317490A1 (de) * | 1993-05-26 | 1994-12-01 | Teves Gmbh Alfred | Unterdruck-Bremskraftverstärker |
GB9524073D0 (en) * | 1995-11-24 | 1996-01-24 | Prodrive Eng Ltd | Gear change mechanism |
DE19637296A1 (de) * | 1996-09-13 | 1998-03-19 | Wabco Gmbh | Kolben/Zylinder-Anordnung |
US6732517B2 (en) * | 2002-03-15 | 2004-05-11 | Delphi Technologies, Inc. | Retainer for brake master cylinder travel sensor |
DE10255396A1 (de) * | 2002-11-28 | 2004-06-17 | Zf Friedrichshafen Ag | Elektro-pneumatische Schalteinheit |
DE10255640B3 (de) * | 2002-11-28 | 2004-01-22 | Rexroth Mecman Gmbh | Druckmittelzylinder, insbesondere für ein Streckwerk einer Textilmaschine |
DE202005005508U1 (de) | 2005-04-07 | 2005-06-02 | Festo Ag & Co. | Kolben und damit ausgestattete fluidbetätigte Stellvorrichtung |
DE202007001020U1 (de) | 2007-01-17 | 2007-08-02 | Dtb-Dachtechnik Briel Gmbh & Co. Kg | Halteeinrichtung für ein mehrteiliges Flachdachabschlußprofil |
-
2008
- 2008-03-15 DE DE102008014506A patent/DE102008014506A1/de not_active Withdrawn
-
2009
- 2009-02-04 EP EP09722753A patent/EP2257712B1/de active Active
- 2009-02-04 ES ES09722753T patent/ES2397506T3/es active Active
- 2009-02-04 JP JP2011502246A patent/JP5605851B2/ja active Active
- 2009-02-04 WO PCT/EP2009/000731 patent/WO2009115168A1/de active Application Filing
- 2009-02-04 US US12/736,017 patent/US8833234B2/en active Active
- 2009-02-04 CN CN200980105932.XA patent/CN101952606B/zh active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2009115168A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN101952606B (zh) | 2013-12-25 |
US8833234B2 (en) | 2014-09-16 |
US20110048363A1 (en) | 2011-03-03 |
WO2009115168A1 (de) | 2009-09-24 |
EP2257712B1 (de) | 2012-10-31 |
ES2397506T3 (es) | 2013-03-07 |
DE102008014506A1 (de) | 2009-09-17 |
CN101952606A (zh) | 2011-01-19 |
JP5605851B2 (ja) | 2014-10-15 |
JP2011514498A (ja) | 2011-05-06 |
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