EP2882967A1 - Zylinder-kolben-einheit - Google Patents
Zylinder-kolben-einheitInfo
- Publication number
- EP2882967A1 EP2882967A1 EP13791713.4A EP13791713A EP2882967A1 EP 2882967 A1 EP2882967 A1 EP 2882967A1 EP 13791713 A EP13791713 A EP 13791713A EP 2882967 A1 EP2882967 A1 EP 2882967A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder
- counter
- piston unit
- unit according
- abutment part
- 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
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
- F15B15/24—Other details, e.g. assembly with regulating devices for restricting the stroke
Definitions
- the invention relates to a cylinder-piston unit whose piston is connected to a protruding on one end face of the cylinder piston rod.
- the non-generic EP0346504A1 discloses a rodless piston-cylinder assembly with a device for stroke limitation.
- the stroke limiter comprises a drum mounted rotatably next to the cylinder, from which limit stops of different lengths protrude parallel to the cylinder longitudinal axis along its circumference.
- a movable along the cylinder drive member which is coupled via magnetic arrangements with the piston contactless, forms a stop member, which cooperates with the respectively brought into position limit stop of the drum.
- the stroke limitation disclosed in EP0346504A1 is not transferable to cylinders with piston rods.
- a disadvantage of this arrangement is that the drive member is loaded asymmetrically during the attack.
- the movement of the drive member can be limited with the device for limiting the stroke in one direction only.
- FR988036A discloses a lathe having a feed shaft with an adjustable stop.
- a rotatable about the shaft axis rotating part encloses the shaft and defined depending on the rotational position of a certain limit stop, with which cooperates a tailed to the movable part of the feed shaft stop member.
- This document is located far from the subject invention, since it does not affect a cylinder-piston unit.
- a limitation of the movable part is only possible in one direction.
- US76732A discloses a hydraulic press, in particular for pressing tobacco with a cylinder and a ring arranged above the cylinder and having gradations on its upper side, which is rotatable with respect to the cylinder and acts as a holding device for the pressing head sitting on the piston rod.
- the pressing head is connected to the bottom of the pressing frame via vertically extending rods.
- the holding device allows holding the pressing frame in different height positions.
- US3177980A discloses a hydraulic locking device for controlling the relative movement of two parts.
- An extending beyond the cylinder stop sleeve has in its wall axially extending slots, which have gradations at one of its ends.
- a pin connected to the piston rod and diametrically oriented pin engages in this slot, whereby its way through the stepped end of the slot is limited.
- the sleeve is rotatable, whereby the desired gradation can be selected as a stroke limitation.
- DE1964126A1 discloses a locking device for controlling the relative movement between two parts with a hydraulic cylinder connected to one of the two parts.
- a stop means consists of a first stop, which is drivingly connected to the cylinder, and a second stop, which is drivingly connected to the piston rod. Is on the tubular piston rod. First and second stops cooperate to limit the range of the piston stroke.
- the stop connected to the piston rod consists of an axially adjacent to the cylinder Anschlagthülse, in the direction of the circumference several gradations are formed and which is rotatable about the cylinder axis. With the gradations act radially extending stop fingers of the stop connected to the cylinder.
- FR1596551A discloses a stroke limiter for a cylinder with rods along which stops are linearly adjustable. These rods are guided on a radial extension on the cylinder head and connected to the piston rod via a frame.
- the object of the invention is to provide a cylinder-piston unit with which the movement of the piston rod can be reliably and adjustably defined.
- the path of the piston rod should be limited in both directions and variably adjustable.
- the solution should be space-saving and cost-effective.
- the cylinder-piston unit should have a compact structure and be installed in common machine tools without costly adaptations.
- a cylinder-piston unit of the type mentioned above has a variably adjustable Hubbegrenzungs adopted in the form of a stop mechanism, which comprises a stop member and a symbols- impact member, wherein the stop member with a first Section is attached to a protruding from the cylinder part of the piston rod and with a second portion which extends along the outside of the cylinder cooperates in a stop position with the counter-stop member, and wherein the counter-stop member is held axially with respect to the cylinder, and that the counter-abutment part is rotatable relative to the stop member, wherein the stop member and the counter-stop part in dependence on the relative rotational position form different pairs of stops through which the path of the piston rod can be limited to different degrees.
- a stop mechanism which comprises a stop member and a Gegenan- impact member, wherein the stop member with a first Section is attached to a protruding from the cylinder part of the piston rod and with a second portion which extends along the outside of the cylinder cooperates
- Such a solution not only allows a reliable and defined adjustable stroke limitation, but also a space-saving, compact design.
- the latter allows the use of inventive cylinder-piston units in common (tool) machines without complex adaptations.
- the travel limit for the displacement of tools is thus already integrated into the drive and requires no additional measures, whereby the cost of upgrading a machine with a variable path limitation are kept low.
- the second portion may extend outwardly along the cylinder both adjacent thereto and spaced therefrom.
- the limit stops associated with the different pairs of stops have different heights or dimensions in the axial direction and therefore limit the axial travel to different degrees.
- the limit stops are formed integrally in the counter-stop piece. At least those limit stops which limit the travel of the stop member in an axial direction are preferably each formed integrally with the counter stop member.
- the counter-stop member is rotatable relative to the cylinder and / or forms different limit stops, which are each assigned to the different Anschlagsparun- gene.
- the counter-stop part forms on both of its end faces, which are axially spaced from each other with respect to the cylinder longitudinal axis, in each case different limit stops, so that the travel of the piston rod can be limited to different degrees in both directions.
- the counter-abutment part is formed from two mutually rotatable sections, wherein one of the two end faces of the counter-abutment part is formed on one of the two sections and the other end face of the counter-abutment part is formed on the other section.
- any desired combinations of stop pairings can be set and the end stops can be adjusted as required both for the extension and the retraction of the piston rod.
- the counter-abutment part in two regions, which are axially spaced from each other with respect to the cylinder axis, each form different limit stops, so that the travel of the piston rod can be limited to different degrees in both directions.
- the two axially spaced apart regions surfaces of the counter-abutment part can be, for example, its end faces or laterally projecting sections of the counter-abutment part or facing sections or surfaces.
- the counter-abutment part is formed from two mutually rotatable sections, wherein the one area of the counter-abutment part, which forms different limit stops, on which one of the two sections is formed and the other area of the counter-abutment part, which forms different limit stops, is formed on the other section.
- the two regions which are axially spaced apart from one another with respect to the cylinder longitudinal axis and on which different limit stops are respectively formed preferably the two end faces of the counterpart stop part.
- the second portion of the stop member is formed by at least one elongate arm which extends substantially parallel to the longitudinal axis of the cylinder.
- Such extending arm hardly takes up space, whereby the cylinder-piston unit can be designed to save space.
- the second portion of the stop member is formed by at least two substantially parallel arms extending along opposite sides of the cylinder. This allows a symmetrical loading of the stop member and the counter-stop member during the stop, whereby wear or jamming of the moving parts is prevented.
- the second portion of the stop member has two with respect to the cylinder longitudinally axially spaced apart, cooperating with the counter stop member stop structures and projects the counter stop part at least partially in the area between the stop structures, so that the travel of the piston rod can be limited in both directions. With only one stop part, the travel in both piston directions can thus be limited, whereby the possible applications of the cylinder-piston unit are increased.
- the stop structures are in the form of lugs which protrude radially outward with respect to the cylinder. This is a particularly simple way to create limits on the opposite directions without increasing space requirements.
- the counter-abutment part is arranged at the level of the cylinder. In this case, the counter-stop part enclose the cylinder or be arranged next to the cylinder, whereby a particularly compact design is achieved.
- the counter-abutment part is rotatable about the longitudinal axis of the cylinder. This represents a particularly space-saving and easy-to-use design.
- the counter-stop member is formed in the form of a sleeve enclosing the cylinder. Since the thickness of the sleeve wall can be kept low, the space required is further reduced by this design. In addition, this results in a compact design.
- the different limit stops are formed by a step-shaped wall of the sleeve.
- the counter-abutment can thus be made compact and easy.
- the steps in the wall can e.g. be formed in a wall recess, which opens in the axial direction. Alternatively, it could be at the steps to axial jumps ago.
- the counter-stop part in the form of the sleeve, together with the integrated limit stops, is manufactured in one piece.
- a seated on the cylinder holder is provided for axially holding the counter-abutment part.
- the cylinder assumes the additional function of holding the counterpart stop part.
- the holder can be attached directly or indirectly to the cylinder.
- the holder is formed from at least two axially spaced-apart, radially outwardly projecting projections, between which the counter-stop member is inserted, resulting in a reliable axial fixation.
- the projections at least partially run around the cylinder. In addition to a simple production of the fixation of the counterpart stop part is ensured. Its rotatable bearing relative to the cylinder is positively influenced by the projections.
- the second portion of the stop member is guided by the projections in the axial direction.
- the projections thus assume a further function, resulting in a particularly compact and protected from wear structure.
- the holder is formed on an intermediate sleeve arranged between the counter-abutment part and the cylinder, on which the counter-abutment part is rotatably mounted.
- a conventional cylinder-piston unit can be easily retrofitted in this way, in which the adapted to the cylinder intermediate sleeve together with counter stop and stop member are placed on the cylinder.
- the counter-abutment part is rotatable about an axis of rotation, which is arranged laterally spaced from the cylinder and is substantially parallel to the cylinder longitudinal axis.
- the counter-stop member is separately and spaced from the cylinder accessible.
- the counter-stop member is formed as a drum whose longitudinal axis coincides substantially with its axis of rotation. A drum is easy to handle and provided with various limit stops.
- the limit stops are formed on one end face of the drum as sector-wise graduations.
- the limit stops are thus integrally formed in the counter-stop part.
- a lower portion of the cylinder is connected to a lower portion of the rotation axis via a first connection member, and an upper portion of the cylinder is connected to an upper portion of the rotation axis via a second connection member.
- a passage is provided in one of the connecting elements, through which the stop member is passed.
- the second section of the abutment part preferably extends between the cylinder and the counter-abutment part.
- the stop member may extend entirely or only partially between the cylinder and stop member. In addition to a compact design, the stop member can thereby be guided and / or better protected against mechanical influences.
- the counter-stop member is manually rotatable, so that a simple adjustment of a certain limit stop can be made in the path of the stop member.
- the stop combination can be adjusted by hand relatively fast and repeatable.
- the counter-abutment part preferably cooperates with a latching device with which the rotational positions of the counter-abutment part assigned to the respective abutment pairings can be arrested. This prevents an already set limit stop, e.g. shaken out of position.
- the latching device comprises a preferably spring-loaded ball pressure piece. This constitutes a simple and reliable variant.
- the latching device allows the counter-stopper to be frictionally engaged in any position (for example in the case of a drum or sleeve in each sector).
- this comprises the cylinder-piston unit means for measuring the distance covered piston travel (position measuring system for cylinder position). In addition to the Hubbegrenzungs adopted thereby the set piston travel can be checked.
- the cylinder-piston unit comprises means for measuring the relative rotational position of the counter-abutment part, in particular in the form of an angle measuring device (path measuring system for drum or sleeve angle).
- an angle measuring device path measuring system for drum or sleeve angle.
- the cylinder-piston unit is pneumatically actuated and thus represents a pneumatic drive with multiple end stops.
- the invention Hubbegrenzungs pleased represents a special complement to your applications.
- a preferred application of a cylinder-piston unit according to the invention is a bending machine for bending in particular flat workpieces with a lower tool (or die) and an upper tool, which are movable towards each other by a first drive to effect the bending operation.
- a second drive is intended to move the lower tool as such, e.g. to adjust or adapt to different workpiece sizes.
- a cylinder-piston unit according to the invention could now be used as the second drive.
- the axis defined by the second drive is usually also referred to as the I-axis.
- a cylinder-piston unit according to the invention is much cheaper than a CNC-controlled drive and much easier to use than previous pneumatic I-axes.
- the cylinder drive can thus be used efficiently and safely for the I-axis movement of a bending machine.
- a particular embodiment includes attaching to a pneumatic cylinder a mechanism partially attached to the movable system or partially to the fixed system.
- Fixed and moving parts have different end stops with each other.
- the mechanism can be adjusted so that the end stops (measured in the stroke direction) change digitally.
- drum counterstop part which has two matching, predefined end stops in its sectors.
- the drum is in
- a fork (stop member) having two stop surfaces / structures is coupled to the movable system.
- the drum can be rotated by hand and thus the different pairs of stops are set. You can divide this drum lengthwise 2 to get double stop combinations.
- a (compact) cylinder with adjacent stop mechanism is another implementation example.
- Fig. 1 shows a first embodiment of a cylinder-piston unit according to the invention
- Fig. 2 the cylinder-piston unit of FIG. 1 with different degrees extended
- FIG. 3 shows a second embodiment of a cylinder-piston unit according to the invention
- FIG. 5 shows the cylinder-piston unit of Figure 3 with partially cut stop mechanism ..
- FIG. 6 shows the cylinder-piston unit from FIG. 3 with a partially cut-open stop mechanism, wherein the sectional plane is inclined at 90 ° with respect to the sectional plane of FIG. 5;
- Fig. 7 shows a cylinder-piston unit in section along the cylinder longitudinal axis.
- FIG. 1 and 2 show a first embodiment of a cylinder-piston unit 1.
- a piston arranged displaceably in the interior of the cylinder 2 is connected to the piston rod 3 which protrudes on the end face of the cylinder 2 (similar to FIG. 7).
- the cylinder 2 defines a cylinder longitudinal axis 20.
- Fig. 1 shows an extended position of the piston rod 3 and Fig. 1 a retracted position of the piston rod 3.
- the cylinder-piston unit 1 has a variably adjustable stroke limiting device in
- the stop member 6 is fixed with a first portion 7 on a protruding from the cylinder 2 part of the piston rod 3 and cooperates with a second portion 8, which extends outside along the cylinder 2, in the respective stop position with the counter-stop member 11 together.
- the counter-abutment part 11 is - viewed in the axial direction - arranged at the height of the cylinder 2 and axially fixed with respect to the cylinder 2.
- the counter-stop member 11 is rotatable relative to the stop member 6, wherein stop member 6 and counter-stop member 11 depending on the relative rotational position form different pairs of stops, through which the path of the piston rod 3 can be limited to different degrees.
- the counter-abutment part 11 is rotatable relative to the cylinder 2 and forms different limit stops 12, which are each assigned to the different stop pairings.
- the counter-abutment part 11 can each form different limit stops on both of its end faces, which are axially spaced apart relative to the cylinder longitudinal axis 20, so that the travel of the piston rod 3 can be limited to different degrees in both directions.
- the second portion 8 of the abutment part 6 is formed by an elongated arm which extends substantially parallel to the longitudinal axis 20 of the cylinder 2, and has two with respect to the cylinder longitudinal axis 20 axially spaced apart, with the counter-abutment part 11 cooperating stop structures 9, 10.
- the counter-abutment part 11 projects with a peripheral part into the area between the stop structures 9, 10, so that the travel of the piston rod 3 can be limited in both directions.
- the stop structures 9, 10 are in the form of lugs which project radially outward with respect to the cylinder 2.
- the counter-abutment part 11 is rotatable about a rotation axis 19, which is arranged laterally spaced from the cylinder 2 and is substantially parallel to the cylinder longitudinal axis 20.
- the counter-abutment part 11 is designed in the form of a drum whose longitudinal axis substantially coincides with its axis of rotation 19.
- the different limit stops 12 are formed on a front side of the drum as a sectoral gradations. 1 and 2, only the upper limit stops 12 can be seen, however, correspondingly formed limit stops (for the lower stop structure 9) can also be provided on the lower end face of the drum.
- the drum may also be formed 2-divided along its length to obtain double stop combinations.
- the counter-abutment part 11 is made of two mutually rotatable Abschnit- formed, wherein one of the two end faces of the mating stop member 11 is formed on the one of the two sections and the other end face of the mating stop member 11 is formed on the other portion. In Figs. 1 and 2, the upper portion is rotatable against the lower portion (indicated by a dividing line).
- a lower portion of the cylinder 2 is connected to a lower portion of the rotation shaft 19 via a first connecting member 21, and an upper portion of the cylinder 2 is connected to an upper portion of the rotation shaft 19 via a second connecting member 22.
- a switching element e.g. As shown in FIGS. 1 and 2 a rod nen-, which extends between the first and second connecting element and whose longitudinal axis preferably coincides with the axis of rotation 19 nen.
- a passage 23 is provided, through which the stop member 6 is passed. From Fig. 1 and Fig. 2 it can be seen that the elongated second portion 8 of the stop member 6 between the cylinder 2 and counter-stop member 11 extends.
- FIGS. 3 to 6 show another embodiment of a cylinder-piston unit 1 which is independent of itself, again using the same reference numerals or component designations for the same parts as in the preceding FIGS. 1 and 2.
- the piston rod is retracted in Fig. 3 and extended in Fig. 4, while in Figs. 5 and 6 of the stop mechanism is shown partially cut open 'is shown.
- FIG. 7 shows a section along the cylinder longitudinal axis 20 and the piston 4 which is movable in the cylinder 2.
- the counter-abutment part 11 is rotatable about the longitudinal axis 20 of the cylinder 2 and also forms different limit stops 12, 13, which are each assigned to the different stop pairings.
- the counter-abutment part 11 forms on both of its end faces, which are axially spaced from each other with respect to the cylinder longitudinal axis 20, in each case different limit stops 12, 13, so that the travel of the piston rod 3 can be limited to different degrees in both directions.
- the first portion 7 of the stop member 6 is a disc in the example shown, which is pushed with its central opening on the piston rod 3 and fixed there by means of nuts.
- the second portion 8 of the abutment part 6 is formed by two substantially mutually parallel arms extending along opposite sides of the cylinder 2 and extending substantially parallel to the longitudinal axis 20 of the cylinder 2.
- the stop member 6 has here the shape of a fork.
- the second portion 8 of the stop member 6 has two with respect to the cylinder longitudinal axis 20 axially spaced, cooperating with the counter-stop member 11 stop structures 9, 10 (eg in the form of radially outwardly projecting lugs), wherein the counter-stop member 11 partially in the area between the stop structures 9, 10 protrudes, so that the path of the piston rod 3 can be limited in both directions.
- the counter-stop member 11 stop structures 9, 10 eg in the form of radially outwardly projecting lugs
- the counter-abutment part 11 is formed in the form of a cylinder 2 enclosing and rotatable about the cylinder sleeve 14.
- the different limit stops 12, 13 on the upper and on the lower end face of the sleeve 14 are formed by a step-shaped wall of the sleeve 14.
- the counter-abutment part 11 could be formed from two mutually rotatable sections, so that the upper limit stops 12 and the lower limit stops 13 are additionally rotatable against each other (about the cylinder longitudinal axis).
- a holder 15 seated on the cylinder 2 is provided.
- the holder 15 is formed from at least two axially spaced-apart, radially outwardly projecting projections 16, 17, between which the sleeve 14 is inserted.
- the projections 16, 17 run at least partially around the cylinder 2.
- the two arms of the second portion 8 of the stop member 6 are guided in the interrupted portions of the projections 16, 17 in the axial direction.
- the bracket 15 with the projections 16, 17 is formed on a disposed between the counter-stop member 11 and the cylinder 2 intermediate sleeve 18, on which the counter-stop member 11 is also rotatably mounted.
- the second section 8 or the arms of the abutment part 6 extends in sections between the cylinder 2 and the counter-abutment part 11.
- the counter-stop member 11 may be manually rotatable.
- the counter-abutment part 11 cooperate with a latching device, with which the respective stop pairings associated rotational positions of the counter-abutment part 11 can be locked.
- a latch can e.g. a preferably spring-loaded ball pressure piece, which can engage in corresponding, the stop pairings associated recesses in the counter-stop.
- the cylinder-piston unit 1 may additionally comprise a device for measuring the distance covered piston travel and / or means for measuring the relative rotational position of the counter-abutment part 11, in particular in the form of an angle measuring device.
- the solution according to the invention has proven particularly useful with pneumatically actuated cylinders, but all other types of cylinders are also encompassed by the invention.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT8762012A AT512663B1 (de) | 2012-08-08 | 2012-08-08 | Zylinder-Kolben-Einheit |
| PCT/AT2013/050151 WO2014022871A1 (de) | 2012-08-08 | 2013-08-06 | Zylinder-kolben-einheit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2882967A1 true EP2882967A1 (de) | 2015-06-17 |
| EP2882967B1 EP2882967B1 (de) | 2016-09-21 |
Family
ID=49303623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP13791713.4A Active EP2882967B1 (de) | 2012-08-08 | 2013-08-06 | Zylinder-kolben-einheit |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2882967B1 (de) |
| AT (1) | AT512663B1 (de) |
| WO (1) | WO2014022871A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018101409B3 (de) * | 2018-01-23 | 2019-04-04 | Schaeffler Technologies AG & Co. KG | Nehmerzylinder mit mehreren Einzelkolben; Betätigungseinrichtung; sowie Kupplungssystem |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US76732A (en) * | 1868-04-14 | Improvement in eydkaulic peesses | ||
| FR988036A (fr) | 1949-04-07 | 1951-08-22 | Butée réglable de tour parallèle sur barre de chariotage pour débrayage automatique | |
| CH363247A (fr) * | 1959-03-10 | 1962-07-15 | Lee Porter Percy | Dispositif de blocage hydraulique, notamment pour dossier inclinable de siège |
| FR1596551A (de) * | 1968-07-31 | 1970-06-22 | ||
| GB1236300A (en) * | 1969-08-01 | 1971-06-23 | P L Porter & Co | Hydraulic locking device |
| JPS58207508A (ja) * | 1982-05-25 | 1983-12-03 | Sumitomo Metal Ind Ltd | シリンダ |
| JPS61116111A (ja) * | 1984-11-12 | 1986-06-03 | Toyoda Autom Loom Works Ltd | 流体圧シリンダのストロ−ク調整装置 |
| ATE72022T1 (de) | 1988-06-11 | 1992-02-15 | Festo Kg | Kolbenstangenlose kolben-zylinder-anordnung mit einer vorrichtung zur hubbegrenzung. |
-
2012
- 2012-08-08 AT AT8762012A patent/AT512663B1/de not_active IP Right Cessation
-
2013
- 2013-08-06 EP EP13791713.4A patent/EP2882967B1/de active Active
- 2013-08-06 WO PCT/AT2013/050151 patent/WO2014022871A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2014022871A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| AT512663A4 (de) | 2013-10-15 |
| EP2882967B1 (de) | 2016-09-21 |
| WO2014022871A1 (de) | 2014-02-13 |
| AT512663B1 (de) | 2013-10-15 |
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