EP4526092A1 - Abdichtung eines radialspalts zwischen zwei glieder eines roboterarms - Google Patents
Abdichtung eines radialspalts zwischen zwei glieder eines roboterarmsInfo
- Publication number
- EP4526092A1 EP4526092A1 EP23723841.5A EP23723841A EP4526092A1 EP 4526092 A1 EP4526092 A1 EP 4526092A1 EP 23723841 A EP23723841 A EP 23723841A EP 4526092 A1 EP4526092 A1 EP 4526092A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- seal
- robot arm
- seal carrier
- link
- links
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J19/00—Accessories fitted to manipulators, e.g. for monitoring, for viewing; Safety devices combined with or specially adapted for use in connection with manipulators
- B25J19/0075—Means for protecting the manipulator from its environment or vice versa
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3248—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports
- F16J15/3252—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3268—Mounting of sealing rings
Definitions
- the present invention relates to sealing a radial gap between two links of a robot arm.
- Robot arms often have several joints in which two members of the robot arm are connected to one another in such a way that they can be rotated relative to one another about an axis of rotation of the respective joint.
- Radial shaft seals in accordance with DIN 3760 are used to seal radial gaps between components that can be rotated relative to one another. However, these have fixed external and internal diameters and widths, so that the components to be sealed must be adapted accordingly depending on the dimensions of the preselected radial shaft seal. In particular, this can result in housing components and/or shaft having to be made unnecessarily large and/or heavy in order to be able to install the corresponding radial shaft seal.
- the object of the present invention is to improve the sealing of a radial gap between two links of a robot arm, preferably to reduce, in particular to avoid, the aforementioned disadvantages.
- Claims 14-16 provide protection for a corresponding sealing arrangement or described here or its use or a method for sealing at least one radial gap of a robot arm in the manner described here, in particular using a corresponding sealing arrangement or described here.
- the subclaims relate to advantageous developments, whereby the features of the subclaims referring back to claim 1 can also form features of advantageous developments of the subject matter of claims 14-16.
- a robot arm has one or more pairs of links, each with two links, which are or are connected to one another in a joint (of the respective pair of links) in such a way that they rotate relative to one another about an axis of rotation (of the respective pair of links or Joint) can be rotated, wherein in one embodiment the two members of the or one or more of the pairs of members (each) can be rotated about the respective axis of rotation by a drive, preferably an electric motor.
- a link of a pair of links can also be a link of another pair of links of the robot arm.
- the robot arm has at least three, in particular precisely or at least six, in one embodiment precisely or at least seven, joints.
- the one member of the or one or more of the pairs of members which in the present case, without limiting generality, is also (in each case) the first member (of the (respective) pair of members).
- each sealing arrangement is provided or used, which (each) has one Seal carrier, which is attached to the (respective) one or first of the two members, and has an elastic seal which is used to seal the (respective) radial gap between the (respective) one or first and the (respective) other or second of the (respective) two members is supported on the one hand on this seal carrier and on the other hand on the (respective) other or second member, preferably supported (at least) in the radial direction, in particular is braced or compressed between these (at least in the radial direction) or becomes.
- the two members can advantageously be freely dimensioned in one embodiment. Additionally or alternatively, in one embodiment, material and therefore weight, in particular on the part of the (respective) one or first link, can be reduced. Additionally or alternatively, the seal carrier and/or the seal can be easily adjusted in one version, without having to change one or the first and/or the other or second link. Additionally or alternatively, in one embodiment, the seal carrier and/or the seal can be easily assembled, dismantled, maintained and/or checked.
- the one or first link of the or one or more of the pairs of links can in particular be (in each case) a more proximal or base-side link of the robot arm, the other or second link of this or these pairs of links correspondingly being a more distal one or end-effector-side (right) link of the robot arm.
- This can be particularly advantageous because it means that more distal members do not have to bear the weight of the sealing arrangement explained below.
- the one or first link of the or one or more of the pairs of links (each) can be a more distal or end effector-side link of the robot arm, the other or second link of this or these pairs of links can be a more proximal one or base-side (right) link of the robot arm.
- the present invention can be particularly advantageous, especially since, as explained below, the weight of the first link can be reduced.
- the seal carrier and/or the elastic seal is ring-like.
- the seal carrier and/or the elastic seal (each) is formed in one piece.
- weight can be (further) reduced in one embodiment.
- the assembly and/or function can be (further) improved in one embodiment.
- the seal carrier can be made in one piece and the elastic seal in several parts or, conversely, the seal carrier can be made in several parts and the elastic seal in one piece.
- the or one or more of the seal carriers are fastened frictionally to the (respective) one or first member, in one embodiment so that between the seal carrier and the one or first member there is an interference fit, and/or by pressing in or on, preferably in the axial direction, and/or shrinking on.
- Axial refers to the (respective) axis of rotation
- radial refers to a direction perpendicular to the (respective) axis of rotation and the direction of rotation or circumference around it, preferably away from the (respective) axis of rotation outwards.
- this or one or more of these seal carriers and/or one or more further seal carriers is or is (each) positively attached to the (respective) one or first member, in one embodiment in axial, radial and/or Circumferential direction secured, preferably fixed or fixed.
- one or more of the seal carriers are or are (each) materially fastened to the (respective) one or first member, in one embodiment by (ver)gluing and/or (ver )Welding.
- an advantageous, preferably reliable (more) fastening can be realized in one embodiment.
- Particularly preferred is the combination of gluing with pressing and/or shrinking, whereby, as mentioned above, a particularly reliable and at the same time low-vibration fastening can be achieved.
- the or one or more of the seal carriers are or are fastened in a radial, preferably frontally arranged, recess of a wall of the (respective) one or first member, preferably thin-walled in this area, preferably in a and/or ring-like depression that is open towards an end face of this wall.
- the seal carrier can be positioned more reliably, more compactly, more simply and/or more protected.
- the one or more of the seal carriers are or are arranged on an inside of the (respective) one or first member.
- the seal carrier can be positioned more reliably, more compactly and/or more protected.
- the (respectively) one or more seal carriers are or are arranged on an outside of the (respective) one or first member.
- the seal carrier can be positioned more easily and/or the member can be advantageously dimensioned.
- one or more of the elastic seals are or are arranged on an inside of the (respective) other or second member.
- the seal can be positioned more reliably, more compactly and/or more protected.
- the one or more of the elastic seals are (each) arranged on an outside of the (respective) other or second member.
- the seal can be positioned and/or maintained more easily.
- the or one or more of the elastic seals are supported in a radial, preferably frontally arranged, recess of a wall of the (respective) other or second member, which is preferably thin-walled in this area, preferably in a too an end face of this wall that is open and/or ring-like recess.
- the or one or more of the seal carriers (each) have a radial recess, in a further development a radial groove, in which the (respective) seal is supported, in one embodiment it is secured axially on one or both sides.
- the seal can be positioned more reliably and/or more compactly and/or protected.
- the one or more of the first members are a one- or multi-part metal and/or cast component.
- the invention can be used with particular advantage for (metal) castings in particular, since the seal carrier(s) significantly saves material and therefore weight, or dimensions that are advantageous for the casting can be achieved.
- the one or more of the seal carriers in one embodiment are (each) a one-piece or multi-part metal component. As a result, in one embodiment, the associated seal can be reliably supported.
- the one or more of the first members and the (respective) seal carrier attached thereto are made in one version (each) from different materials. In one embodiment, the one or more of the first members and the (respective) seal carrier attached thereto are (each) made from the same material.
- weight can be (further) reduced in one version, while links and seal carriers made of the same material can be used to improve their connection in one version.
- the or one or more of the seal carriers and the (respective) seal supported thereon are made in one version (each) from different materials and/or the or one or more of the seals (each) are made in one or more parts Plastic component.
- the one or more of the first members and/or the one or more of the seal carriers has aluminum, in particular at least one aluminum alloy.
- weight can be (further) reduced in one version.
- the or one or more of the sealing arrangements are designed in such a way that the seal between the two members through the (respective) seal has at least protection class IP5 and/or IP54, in particular according to ISO 20653 and/or DIN EN 60529, Fulfills.
- the robot arm can be designed or used particularly advantageously in one embodiment.
- the present invention also relates to the use of one or more sealing arrangements, as described here, for sealing radial gaps between two members of a robot arm which are connected to one another in a joint and can be rotated relative to one another about an axis of rotation, a sealing arrangement with a seal carrier and an elastic seal for sealing the radial gap between two members of a robot arm that are connected to one another in a joint so that they can rotate relative to one another about an axis of rotation, as described here, and a method for sealing a radial gap between the one or first and the other or second of (each) two links of one or more pairs of links of a robot arm as described here.
- the advantages mentioned here apply equally to the use, sealing arrangement and the process.
- the or one or more of the seal carriers are (each) attached to the (respective) one or first member, and in doing so, preferably by this attachment, the (respective) elastic seal for sealing the radial gap between the Seal carrier and the other or second member braced, preferably (at least) braced or compressed in the radial direction.
- the assembly of the seal can be simplified in one embodiment.
- the or one or more of the seal carriers are (each) attached to the (respective) one or first member, and then or with the seal carrier already attached, the (respective) elastic seal for sealing the radial gap between the seal carrier and the other or second member, preferably (at least) braced in the radial direction, in particular compressed, in one embodiment by mounting the (respective) other or second member on the one or first member.
- Fig. 1 a robot arm according to an embodiment of the present invention
- Fig. 2 a detail of a joint of the robot arm in an axial section.
- Fig. 1 shows an example of a six-axis robot arm, which is preferably intended for collaboration with people or is set up or used for this purpose, and/or in one embodiment is arranged on a mobile platform.
- the present invention is particularly advantageous for this purpose due to the usual boundary conditions, but is not limited to this.
- the present invention is explained below using this example as an example, since this joint represents a particularly preferred application. Additionally or alternatively, the present invention can also be used advantageously in other joints, for example the subsequent joint with a horizontal axis of rotation.
- the designation of one link (in the example of the base frame 11) as the “first link” and the other link (in the example of the carousel 12) as the “second link” is used without loss of generality, although it may be particularly advantageous can if the more proximal member is the one or first member.
- Fig. 2 shows a (part of a) ring-like seal carrier (s) 20, which has an axial flange 20A, which is pressed into an end-side radial recess 11B in a wall 11A of the base frame 11 and additionally glued therein and thereby on an inside of the base frame 11 is or will be arranged.
- s ring-like seal carrier
- a ring-like elastic seal 30 is supported radially on the one hand in a radial annular groove 20B of the seal carrier 20 and on the other hand in a front-side radial recess 12B in a wall 12A of the carousel 12 and is compressed between them in the radial direction. Due to the support in the annular groove 20B, it is secured axially on both sides (up and down in Fig. 2).
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Robotics (AREA)
- General Engineering & Computer Science (AREA)
- Sealing Devices (AREA)
- Manipulator (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022205077.0A DE102022205077A1 (de) | 2022-05-20 | 2022-05-20 | Abdichtung eines Radialspalts zwischen zwei Glieder eines Roboterarms |
| PCT/EP2023/061062 WO2023222353A1 (de) | 2022-05-20 | 2023-04-27 | Abdichtung eines radialspalts zwischen zwei glieder eines roboterarms |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4526092A1 true EP4526092A1 (de) | 2025-03-26 |
Family
ID=86382831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23723841.5A Pending EP4526092A1 (de) | 2022-05-20 | 2023-04-27 | Abdichtung eines radialspalts zwischen zwei glieder eines roboterarms |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20250303591A1 (de) |
| EP (1) | EP4526092A1 (de) |
| CN (1) | CN119233881A (de) |
| DE (1) | DE102022205077A1 (de) |
| WO (1) | WO2023222353A1 (de) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4678952A (en) * | 1985-08-13 | 1987-07-07 | Intelledex Incorporated | Sealed joint for a robot and the like |
| DE10348841B4 (de) | 2003-10-21 | 2005-12-15 | Kuka Roboter Gmbh | Vorrichtung mit relativ zueinander drehbaren Teilen und einer Dichtungsanordnung |
| DE102012202571A1 (de) | 2012-02-20 | 2013-08-22 | Trelleborg Sealing Solutions Germany Gmbh | Dichtungsanordnung und Verfahren zu dessen Herstellung |
| DE102013205880B4 (de) | 2013-04-03 | 2019-10-10 | MTU Aero Engines AG | Dichtungsanordnung |
| DE102018204338A1 (de) | 2018-03-21 | 2019-09-26 | Kuka Deutschland Gmbh | Drehgelenkanordnung |
| US11167433B2 (en) | 2018-10-02 | 2021-11-09 | Flexiv Ltd. | Sealing apparatus and articulated robot |
| JP7252057B2 (ja) * | 2019-05-22 | 2023-04-04 | ファナック株式会社 | シール部材およびロボット |
-
2022
- 2022-05-20 DE DE102022205077.0A patent/DE102022205077A1/de active Pending
-
2023
- 2023-04-27 WO PCT/EP2023/061062 patent/WO2023222353A1/de not_active Ceased
- 2023-04-27 EP EP23723841.5A patent/EP4526092A1/de active Pending
- 2023-04-27 CN CN202380041710.6A patent/CN119233881A/zh active Pending
- 2023-04-27 US US18/864,612 patent/US20250303591A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US20250303591A1 (en) | 2025-10-02 |
| DE102022205077A1 (de) | 2023-11-23 |
| WO2023222353A1 (de) | 2023-11-23 |
| CN119233881A (zh) | 2024-12-31 |
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