EP3821137A1 - Kolben-zylinder-einheit für eine arbeitsmaschine - Google Patents
Kolben-zylinder-einheit für eine arbeitsmaschineInfo
- Publication number
- EP3821137A1 EP3821137A1 EP19770019.8A EP19770019A EP3821137A1 EP 3821137 A1 EP3821137 A1 EP 3821137A1 EP 19770019 A EP19770019 A EP 19770019A EP 3821137 A1 EP3821137 A1 EP 3821137A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder
- piston
- plug
- piston rod
- cylinder unit
- 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
Links
- 238000007599 discharging Methods 0.000 claims 2
- 230000010354 integration Effects 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000003252 repetitive effect Effects 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
- F15B15/08—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
- F15B15/1457—Piston rods
- F15B15/1461—Piston rod sealings
-
- 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
- F15B15/1433—End caps
-
- 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
- F15B15/1438—Cylinder to end cap assemblies
Definitions
- the invention relates to a piston-cylinder unit for a working machine with at least one cylinder and a piston rod displaceably mounted therein, at least one piston rod bearing being provided in the region of the cylinder opening for mounting or guiding the piston rod.
- Piston-cylinder units for hydraulic and pneumatic cylinders are well known.
- a bearing or a guide is provided in the area of the exit of the piston rod from the cylinder housing, for example in the form of a bearing bush inserted into the cylinder housing.
- Figures 1-3 different embodiments of generic cylinders with piston rod bearings are shown.
- Figure 1 shows a cross section through the cylinder housing 1 in the region of the cylinder opening, in which a bearing bush 3 is inserted.
- the bearing bush is provided with an external thread 3a in order to screw the bearing bush 3 into the opening region of the cylinder 1 which is provided with an internal thread.
- bearing bushes 5 are known, which are only inserted into the cylinder opening and are fixed by means of separate hexagon screws 6.
- a sensor system integrated in the cylinder be it for pressure or length or position measurement.
- a direct integration of the sensor unit into the bearing bush is desired; the necessary energy and signal lines of the sensor unit must then be routed out through channels of the bearing bush or the cylinder housing.
- the idea of the present invention is to show an alternative solution for a piston-cylinder unit or piston rod bearing, which allows simple and better integration of any component, in particular a corresponding sensor unit.
- a first part of the piston rod bearing can serve, for example, to integrate a component, in particular a sensor unit, while the second bearing part ensures that the first bearing part is adequately fixed within the cylinder housing.
- the piston rod bearing is designed as a two-part bearing bush.
- the outer circumference of the bearing bush is preferably formed by the assembled bearing parts, while the inner circumference, which receives the piston rod, is formed only by one of the bearing parts.
- the first part of the piston rod bearing or the bearing bush is formed by a plug-in part which is only inserted or inserted into the cylinder opening.
- the second bearing part is designed as a screw part with a suitable thread, which engages in a complementary thread of the cylinder housing.
- the screw part provides an external thread which interacts with an internal thread of the cylinder in the region of the cylinder opening.
- the plug-in part particularly preferably provides a cylindrical projection on which the threaded ring is placed.
- the threaded ring applies a force acting in the axial direction to the plug-in part, as a result of which this is pressed into the cylinder opening.
- the plug-in part comprises a corresponding stop surface for the screw part or the threaded ring.
- An embodiment of the plug-in part is conceivable with a cylindrical projection for receiving the threaded ring and a step-like increase in diameter on the outside diameter of the bearing as a stop surface.
- the two-part construction of the bearing bush ensures that at least part of the bearing bush can be prepared particularly easily for the integration of a corresponding special sensor unit or another element.
- at least a part of the bearing bush, in particular the plug-in part can comprise an integral device, in particular a sensor unit.
- connection lines of the integral device in particular the sensor unit
- the radial bore is provided directly in the part of the bearing bush, this also the corresponding sensor unit houses. If the sensor unit is integrated into the plug-in part, the corresponding thread designs do not interfere with the placement of the radial bore, since these are instead provided on the screw part of the bearing bush. It is also conceivable that not only connecting lines, but an entire sensor unit including connecting lines can be screwed into the radial bore. Both signal lines and power supply lines are understood as connecting lines.
- the corresponding part of the bearing bush preferably the plug-in part, comprises an axial bore for leading out one or more connecting lines of the sensor unit. These can then emerge at the end in the area of the cylinder opening.
- the claimed piston-cylinder unit is preferably a hydraulic cylinder or pneumatic cylinder.
- the present invention also relates to a work machine with a piston-cylinder unit according to the invention.
- the same advantages and properties result for the working machine as have already been explained above with reference to the piston-cylinder unit according to the invention. For this reason, a repetitive description is omitted.
- the working machine can be a crane or an earth moving machine or other construction machine.
- FIG. 4 shows a sectional illustration of a piston-cylinder unit according to the invention in the region of the bearing bush
- Figure 5 is a sectional view of another embodiment of the piston-cylinder unit according to the invention in the area of the bearing bush and
- Figure 6 perspective views of the two-part bearing bush according to the
- Figure 4 shows a first embodiment of the piston-cylinder unit according to the invention.
- This includes the cylinder housing 10 and a piston rod 20 emerging from the cylinder housing 10, which is displaceably mounted in the axial direction.
- the two-part bearing bush 30 according to the invention is inserted into the cylinder housing 10.
- the bearing bush 30 is composed of a first bearing part 31 in the form of the threaded ring 31 and the second bearing part in the form of the socket 32.
- the socket 32 is inserted into the cylinder opening during assembly of the cylinder, in particular until the stop edge 32a strikes a stop surface of the cylinder housing 10 and prevents the bearing bush 30 from further penetrating into the cylinder 10.
- An integral part of the socket 32 is the sensor unit 40, which is inserted into a cavity of the bearing part 32 provided for this purpose. Any connecting lines of the sensor unit 40 can be led out of the cylinder housing 10 on the front side of the bearing part 32 via at least one axial bore 41.
- the socket 32 provides a cylindrical projection 32c, on which the threaded ring 31 can be applied coaxially.
- the threaded ring 31 itself comprises at least one external thread 31 a, which is in engagement with a complementary internal thread of the cylinder housing 10.
- the threaded ring 31 By screwing in the threaded ring 31, it is moved in the axial direction into the cylinder housing 10 until the threaded ring 31 strikes the stop surface 32b of the socket 32 and takes it along in the axial direction and presses it with its stop edge 32a against the housing projection. This ensures adequate fixation of the socket 32 within the cylinder 10.
- the two-part design of the bearing bush 30 also makes it very easy to create space for the sensor unit 40 or other components.
- FIG. 5 An alternative embodiment of the bearing bush 30 is shown in the illustration according to FIG. 5.
- the socket 32 ′′ also comprises an integrated sensor unit 40 ′′.
- this is screwed with its connecting lines 41 'into a radial bore 50 of the socket 32', so that all sensor lines 41 'are also led out of the cylinder housing 10 in the radial direction.
- FIGS. 6 and 7 again show perspective representations of the bearing bush 30 according to the invention in accordance with the embodiment from FIG. 4.
- the above figures show the dismantled bearing bush with the plug-in part 32 and the threaded ring 31.
- FIG. 7 shows the assembled bearing bush 30.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018123184.9A DE102018123184A1 (de) | 2018-09-20 | 2018-09-20 | Kolben-Zylinder-Einheit für eine Arbeitsmaschine |
PCT/EP2019/074440 WO2020058102A1 (de) | 2018-09-20 | 2019-09-13 | Kolben-zylinder-einheit für eine arbeitsmaschine |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3821137A1 true EP3821137A1 (de) | 2021-05-19 |
Family
ID=67997585
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19770019.8A Pending EP3821137A1 (de) | 2018-09-20 | 2019-09-13 | Kolben-zylinder-einheit für eine arbeitsmaschine |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3821137A1 (de) |
DE (1) | DE102018123184A1 (de) |
WO (1) | WO2020058102A1 (de) |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1206366A (fr) * | 1958-08-13 | 1960-02-09 | Hydrel | Procédé pour le montage des organes divers notamment des chapeaux de vérin en bout des cylindres et tubes |
US5455509A (en) * | 1990-10-26 | 1995-10-03 | Kabushiki Kaisha Komatsu Seisakusho | Device for mounting position detecting sensor |
US6666784B1 (en) * | 1999-10-06 | 2003-12-23 | Ntn Corporation | Piston rod piston detector, autotensioner and belt tension adjuster |
US7162947B2 (en) * | 2003-12-19 | 2007-01-16 | Caterpillar Inc | Mount for cylinder position sensor |
DE102005033846A1 (de) * | 2004-10-23 | 2006-05-04 | Zf Friedrichshafen Ag | Sensoranordnung für ein Kolben-Zylinderaggregat |
JP2006145018A (ja) * | 2004-11-25 | 2006-06-08 | Kayaba Ind Co Ltd | 油圧シリンダ |
CN202690575U (zh) * | 2012-07-13 | 2013-01-23 | 牛力机械制造有限公司 | 嵌套式油缸 |
DE102013212224A1 (de) * | 2013-06-26 | 2014-12-31 | Robert Bosch Gmbh | Hydraulikzylinder mit Kolbenstange |
CN104870835A (zh) * | 2013-12-19 | 2015-08-26 | 株式会社小松制作所 | 工作缸装置 |
CN104315149A (zh) * | 2014-10-24 | 2015-01-28 | 中国工程物理研究院化工材料研究所 | 耐高温高压动密封结构 |
CN105697444A (zh) * | 2016-03-22 | 2016-06-22 | 扬州四启环保设备有限公司 | 一种可替代导向带的石墨铜套式活塞杆上组件 |
DE102016105961A1 (de) * | 2016-04-01 | 2017-10-05 | Claas Hungaria Kft. | Hydraulikzylinder für eine landwirtschaftliche Arbeitsmaschine |
-
2018
- 2018-09-20 DE DE102018123184.9A patent/DE102018123184A1/de active Pending
-
2019
- 2019-09-13 WO PCT/EP2019/074440 patent/WO2020058102A1/de unknown
- 2019-09-13 EP EP19770019.8A patent/EP3821137A1/de active Pending
Also Published As
Publication number | Publication date |
---|---|
WO2020058102A1 (de) | 2020-03-26 |
DE102018123184A1 (de) | 2020-03-26 |
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