EP4638063A1 - Verbindungsvorrichtung und roboterarm - Google Patents
Verbindungsvorrichtung und roboterarmInfo
- Publication number
- EP4638063A1 EP4638063A1 EP23808739.9A EP23808739A EP4638063A1 EP 4638063 A1 EP4638063 A1 EP 4638063A1 EP 23808739 A EP23808739 A EP 23808739A EP 4638063 A1 EP4638063 A1 EP 4638063A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ring
- joint
- claw
- connecting ring
- casing wall
- 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
- B25J9/00—Program-controlled manipulators
- B25J9/08—Program-controlled manipulators characterised by modular constructions
Definitions
- the invention relates to a connecting device for connecting a member of a robot arm to a joint body of the robot arm.
- the invention also relates to an associated robot arm.
- WO 2017/207337 A1 describes a joint for an articulated manipulator, with a tubular body which extends along a longitudinal axis thereof and has a first joint end and a second joint end, wherein the first joint end and the second joint end define a first joint plane and a second joint plane, respectively.
- the first joint plane and the second joint are each at an angle of inclination with respect to the longitudinal axis, wherein the first joint plane is arranged parallel to a first axis and wherein the second joint plane is arranged parallel to a second axis, the longitudinal axis is perpendicular to the first axis and the second axis, and wherein the first axis and the second axis are at a mutual angle of rotation of at least one time the angle of inclination.
- the object of the invention is to create a stable, reliable and resilient connecting device for connecting a member of a robot arm to a joint body of the robot arm.
- a further object is to create a robot arm which has at least one such stable, reliable and resilient connecting device.
- a connecting device for connecting a member of a robot arm to a joint body of the robot arm comprising: a member with a circular cylindrical outer shell wall,
- connecting ring connected to the outer casing wall of the link, which has a plurality of receptacles evenly distributed over a circumference, each of which is designed to positively receive one of the engagement elements of the joint carrier ring in order to connect the link to the joint body when the connecting ring is connected to the joint carrier ring, in that the engagement elements of the joint carrier ring positively engage in the receptacles of the connecting ring.
- the links are also constructed from simple rod bodies.
- the simple rod bodies can in particular consist of profile rods which have constant cross-sections over their respective lengths.
- the cross-section can in particular be a circular cross-section or a circular tube cross-section. This has the advantage that the links can be manufactured cost-effectively, in particular because they can be easily obtained in the form of semi-finished products, for example, and can be made up of different lengths depending on the desired kinematic design for the robot arm.
- the connecting device according to the invention creates a very stable, reliable and resilient connecting device for connecting a member of a robot arm to a joint body of the robot arm.
- the respective link has a circular cylindrical outer casing wall.
- the respective link can therefore be formed by a circular cylindrical tube or by a circular cylindrical tube section.
- the desired or required length of the respective link can be produced by cutting such a tube to length.
- the respective length of the tube or tube section determines the geometric distance between the two joint bodies directly connected by the respective link and thus the geometric distance between the two directly connected axes of rotation of the robot arm.
- the joint body can have a first housing part which is mounted, for example, rotatably with respect to a second housing part of the joint body.
- the first housing part forms the joint in cooperation with the second housing part.
- the joint body can also have a gear and/or a drive by means of which the joint can be adjusted automatically.
- the first housing part and/or the second The housing part can have a flange to which the following link of the robot arm is connected.
- the flange can have or form a joint support ring.
- the link to be connected can be attached to the joint body or to the relevant housing part of the joint body via the joint support ring.
- the joint support ring of the joint body has several engagement elements evenly distributed over a circumference.
- the engagement elements can lie on a common circumferential circle with respect to a center, where the center lies on an axis of symmetry of the joint support ring.
- the engagement elements can be designed to protrude and extend parallel to the axis of symmetry of the joint support ring at a distance from this, specifically away from the joint body, towards the link or towards the connecting ring of the link to be connected.
- the connecting ring is firmly connected to the outer casing wall of the link. Such a firm connection can be achieved, for example, by gluing.
- the link and the connecting ring thus form a composite component as a single unit.
- the connecting ring has several receptacles evenly distributed over a circumference.
- the receptacles are each designed to positively receive one of the engagement elements of the joint carrier ring.
- Each receptacle has a recess into which a respective engagement element of the joint carrier ring is inserted and is guided and held flush there.
- Such a connection can in particular be a detachable connection, i.e. the connecting ring and the joint support ring can be separated from each other again without causing any damage, if necessary with the aid of hand tools such as screwdrivers and/or levers, so that the link in question can be detached from the joint body again.
- the various links and various joint bodies can then be reassembled, if necessary in a modified kinematic configuration. In this way, differently constructed robot arms can be produced in a modular manner from a number of identical or different links and a number of identical or different joint bodies.
- Each engagement element of the joint carrier ring can be designed as a claw which projects in the axial insertion direction and has a claw front side pointing in the circumferential direction and a claw rear side pointing counter to the circumferential direction, wherein the claw front side and the claw rear side are on the one hand inclined towards one another in a radially inward-pointing radial direction and on the other hand are also inclined towards one another in the axial insertion direction, and each receptacle of the connecting ring is designed as a pocket corresponding to the respective claw, which has a pocket front side pointing in the circumferential direction and a pocket rear side pointing counter to the circumferential direction, wherein the pocket front side and the pocket rear side are on the one hand inclined towards one another in a radially inward-pointing radial direction and on the other hand are also inclined away from one another in the axial insertion direction.
- the axial plug-in direction is determined by the longitudinal extension of the circular cylindrical member, i.e. by the axis of symmetry of the cylindrical body of the member, in particular a tubular member.
- the claws lie on a partial circle that runs coaxially around the axis of symmetry. The claws thus project from a base body of the joint body in the direction of the connecting ring. The claws therefore project at least essentially parallel to the plug-in direction, i.e. parallel to the axis of symmetry of the member.
- the claws can be designed in the form of a trapezoidal prism with regard to their external shape.
- the respective claw can have a claw front side facing in the circumferential direction, which is a flat surface and is at least substantially rectangular in shape.
- the respective claw can have a claw rear side pointing opposite to the circumferential direction, which is also a flat surface and is at least substantially rectangular in shape.
- the claw front and the claw rear are inclined towards each other in a radial direction pointing radially inwards.
- the respective claw is narrower on its radially inner side in the circumferential direction than on its radially outer side.
- the respective claw is less wide radially inside in the circumferential direction than radially outside.
- the front and rear of the claw are also inclined so that they converge towards one another in the axial direction of insertion.
- the foot of the claw is wider in the circumferential direction than the head of the claw.
- the axial direction of insertion here refers to a plug-in movement of the joint carrier ring in the direction of the connecting ring.
- each receptacle of the connecting ring is designed as a pocket corresponding to the respective claw.
- the respective pocket can have a pocket rear side facing opposite to the circumferential direction, which is also a flat surface and is at least substantially rectangular in shape.
- the front and rear sides of the pockets are inclined towards each other in a radial direction pointing radially inwards. This means that the respective pocket is narrower on its radially inner side in the circumferential direction than on its radially outer side. In other words, the respective pocket is less wide on the radial inside in the circumferential direction than on the radial outside.
- pocket front side of a pocket forms a wedge surface pair with the pocket rear side of an immediately adjacent pocket, such that the wedge surfaces on the radially outer side have a greater distance from each other, i.e. are further apart from each other, than on the radially inner side.
- the front and back of the pocket are also angled away from each other in the axial direction of insertion.
- the base of the pocket is narrower in the circumferential direction than in the upper edge area of the pocket.
- the axial insertion direction here refers to an insertion movement of the connection ring in the direction of the joint carrier ring.
- each claw projecting in the axial plug-in direction can have a claw inner side which is designed such that, when the connecting ring is connected to the joint carrier ring, a respective claw inner side of the claw sits precisely on the outer casing wall of the link.
- the axial plug-in direction here also refers to a plug-in movement of the joint carrier ring in the direction of the connecting ring.
- the claw inner side therefore lies on a radial inner side of the claw.
- the respective claw inner side of the claw should sit precisely directly on the outer casing wall of the link.
- the connecting ring can have corresponding pockets which do not have pocket walls in the base of the pockets, i.e. on a radially inner side of the pockets, but are designed to be open, so that in this area the outer casing wall of the link is exposed, i.e. is not covered by the connecting ring.
- the inner sides of the claws of the joint carrier ring can then rest directly on these exposed sections of the outer casing wall of the link. Forces and/or moments can thus be transferred directly to the link via the inner sides of the claws, without these forces and/or moments having to be guided via the connecting ring.
- the engagement elements of the joint carrier ring can engage in the receptacles of the connecting ring in such a way that, when the connecting ring is connected to the joint carrier ring, a respective end wall of each engagement element pointing in the direction of insertion is positioned at a distance from associated base walls of the corresponding receptacles of the connecting ring, leaving a respective gap.
- connection ring were to touch the joint support ring with its head-side end walls, then it would not be guaranteed that the lateral wall sections of the engagement elements and the lateral wall sections of the receptacles lie flush with one another.
- torques about the link axis i.e. about the axis of symmetry of the joint support ring or the link, can be transmitted particularly well and reliably.
- the curved, radially outwardly curved peripheral outer walls of all the mounts can lie on a common circular cylinder surface of the connecting ring.
- Each gap can be designed in the form of a circular cylinder section, cut parallel to the symmetry axis of the circular cylinder. The gap prevents radially outward, circumferential connecting ring and the joint carrier ring, forces and/or moments are transmitted at these points between the connecting ring and the joint carrier ring. In particular, the gap prevents undesirable shear forces and/or shear stresses from a torque between the connecting ring and the joint carrier ring from being transmitted there.
- the connecting ring can be glued to the circular cylindrical outer casing wall of the link.
- the connecting ring can have an inner casing wall facing the link.
- the adhesive can be applied between the inner casing wall of the connecting ring and the circular cylindrical outer casing wall of the link. It can be a self-curing adhesive. It can also be a multi-component reaction adhesive.
- the connecting ring can have several first screw channels evenly distributed over a circumference and the joint support ring of the joint body can have a corresponding a sufficient number of second screw channels evenly distributed over a circumference, wherein the first screw channels and the second screw channels are designed to receive screws for the screwed connection of the connecting ring to the joint carrier ring.
- a first screw channel can be arranged on the connecting ring between two immediately adjacent receptacles.
- a second screw channel can be arranged on the joint carrier ring between two immediately adjacent engagement elements or claws.
- the number of first screw channels and the number of second screw channels can correspond to the number of receptacles and engagement elements or claws.
- a robot arm having a plurality of links, of which at least one link has a circular-cylindrical outer casing wall, and a plurality of joints connecting the links in a mutually adjustable manner, of which at least one joint has a joint body with a joint support ring, wherein the at least one link with the circular-cylindrical outer casing wall is connected to the at least one joint body by means of a connecting device according to at least one of the described embodiments.
- the invention creates a stable, reliable and resilient connection point, which should make it possible, for example, to connect a modular joint unit, i.e. a joint body, with a joint carrier ring, for example a plastic joint carrier, to a Structural part, i.e. a member of the robot arm, preferably consisting of a tubular profile or semi-finished product, to be detachably connected by means of a connecting ring, such as a plastic flange.
- a connecting ring such as a plastic flange
- one or more components of the connecting device can be made of plastic components; in particular, the connection points can also be tailor-made, for example additively manufactured.
- the advantages lie in the largest possible area and homogeneous distribution of the local and multi-dimensional load at the connection point as well as the most direct and straight force transmission possible between the two connection parts.
- the connecting device connects, for example, the three parts tube profile or link, flange ring or connection ring and joint support or joint body with joint support ring, in such a way that the tube profile and flange ring have a permanent connection and together form the structural part, which is detachably connected to the joint support.
- This not only enables a quick and cost-effective construction, but above all a very flexible one, since the structure length can easily be varied over the length of the tube.
- the separable interface simplifies the assembly of the modules and is used for service tasks and for later reconfiguration of the kinematics.
- connection between the pipe and the ring can be made by a
- Recesses on the ring can be used, among other things, as form elements to temporarily couple a device and to align two adjacent rings of a structural part with each other during assembly.
- the ring can essentially be constructed from an arrangement of circularly uniformly distributed pockets, which provide different functions with different shape elements.
- the contact surface which is inclined in two spatial directions and has a wedge-shaped shape over two angles of attack.
- the contact surfaces are the two tangential boundaries of the pocket.
- the pocket is preferably limited to the outside by an arc-shaped segment, which connects the two contact surfaces and can easily transfer and reduce torsional moments and shear stresses between the contact surfaces.
- the arc-shaped segment does not lie on the coupling partner, so that no radial forces or tilting moments are transferred here.
- connection between ring and carrier is made in the axial direction, via axial forces and torsional moments in a total of two spatial directions, by teeth or claws that are designed in such a way that they fit into the pockets of the ring so that their flanks touch the contact surfaces of the pockets, but the tooth roots and tooth heads have no axial contact with the opposite surfaces.
- the ring and the carrier are preferably pulled together using a screw connection in which a screw with a wide head is guided through a through hole and rests against the flange surface over as large an area as possible.
- a counter thread can be integrated directly into the tooth, particularly in the tooth head of the carrier, for example as a press-in nut, additionally joined or designed as an inserted nut.
- the latter is shown here as an example.
- the nut can, for example, be inserted into a recess in the tooth from behind the tooth head in such a way that it is secured against twisting by shaped surfaces. It is also possible to insert the nut from the side from the outside.
- Fig. 1 shows an exemplary robot arm
- Fig. 2 is a perspective view of an exemplary connecting device according to the invention in a first view
- Fig. 3 is a perspective view of an exemplary connecting device according to the invention in a second view
- Fig. 4 is a sectional view of the connecting device according to Fig. 2 and Fig. 3 in a separated state
- Fig. 5 is a sectional view of the connecting device according to Fig. 2 and Fig. 3 in a connected state
- Fig. 6 is a perspective sectional view of the connecting device according to Fig. 2 and Fig. 3 in a state connected by means of screws,
- Fig. 7 is an enlarged partial sectional view of the connecting device according to Fig. 6 in the area of a screw,
- Fig . 8 a perspective view of the
- Fig. 9 a perspective view of the
- Fig. 10 a perspective view of the
- Fig. 11 is a schematic representation of the connecting device according to Fig. 2 and Fig. 3 with a partial section in the area of two engagement element/receiver connections, and
- Fig. 12 is a schematic representation of the connecting device according to Fig. 2 and
- a robot arm 1 is shown in Fig. 1.
- the robot arm 1 has several links 2, of which at least one link 2 has a circular cylindrical outer casing wall 3.
- the robot arm 1 also has several joints 4 connecting the links 2 in a mutually adjustable manner, of which at least one joint 4 has a joint body 5 with a joint carrier ring 6, wherein the at least one link 2 with the circular cylindrical outer casing wall 3 is connected to the at least a joint body 5 by means of a connecting device 7, as described in more detail below.
- the connecting device 7, as shown in particular in Fig. 2 to Fig. 5, serves to connect a member 2 of the robot arm 1 with a joint body 5 of the robot arm 1-
- the connecting device 7 comprises one of the members 2, which has a circular cylindrical outer casing wall 3.
- the joint body 5 comprises a joint support ring 6, which has a plurality of engagement elements 8 arranged evenly distributed over a circumference.
- the connecting device 7 also comprises a connecting ring 9 which is connected to the outer casing wall 3 of the link 2 and which has a plurality of receptacles 10 which are evenly distributed over a circumference and which are each designed to positively receive one of the engagement elements 8 of the joint carrier ring 6 in order to connect the link 2 to the joint body 5 when the connecting ring 9 is connected to the joint carrier ring 6, in that the engagement elements 8 of the joint carrier ring 6 positively engage in the receptacles 10 of the connecting ring 9, as is shown in particular in Fig. 5 and Fig. 11.
- each engagement element 8 of the joint carrier ring 6 is designed as a claw 8a projecting in the axial insertion direction S1.
- the respective claw 8a has a claw front side 11 pointing in the circumferential direction and a claw rear side 12 pointing counter to the circumferential direction, as can be seen in particular in Fig. 2, Fig. 3 and Fig. 11.
- the claw front side 11 and the claw rear side 12 are on the one hand inclined towards each other in a radially inward-pointing radial direction R and on the other hand also inclined towards each other in the axial plug-in direction S 1.
- each receptacle 10 of the connecting ring 9 is designed as a pocket 10a corresponding to the respective claw 8a, which has a pocket front side 13 pointing in the circumferential direction U and a pocket rear side 14 pointing opposite to the circumferential direction U, wherein the pocket front side 13 and the pocket rear side 14 are on the one hand inclined towards one another in a radial direction R pointing radially inwards and on the other hand are also inclined away from one another in the axial plug-in direction S2.
- each claw 8a projecting in the axial plugging direction S 1 has a claw inner side 15 which is designed such that, when the connecting ring 9 is connected to the joint carrier ring 6, a respective claw inner side 15 of the claw 8a sits precisely on the outer casing wall 3 of the link 2. This is illustrated in particular in Fig. 4 and Fig. 5.
- the engagement elements 8 of the joint carrier ring 6 engage in the receptacles 10 of the connecting ring 9 in such a way that, when the connecting ring 9 is connected to the joint carrier ring 6, a respective end wall 16 of each engagement element 8 pointing in the plug-in direction S 1 is positioned at a distance from associated base walls 17 of the corresponding receptacles 10 of the connecting ring 9, leaving a respective gap Spl.
- the engagement elements 8 of the joint carrier ring 6 can engage in the receptacles 10 of the connecting ring 9 in such a way that, when the connecting ring 9 is connected to the joint carrier ring 6, a respective front edge web 18 pointing in the plug-in direction S2, which connects two adjacent receptacles 10, is positioned at a distance from associated base walls 19 of the joint carrier ring 6, which connect two adjacent engagement elements 8, while leaving a respective gap Sp2. This is also illustrated in Fig. 11.
- each receptacle 10 has an arcuate, radially outwardly curved receptacle peripheral outer wall 20 and each engagement element 8 has a flat engagement element peripheral outer wall 21 (Fig.
- the connecting ring 9 is glued onto the circular cylindrical outer casing wall 3 of the member 2.
- the connecting ring 9 can have an inner casing wall 22 which forms a contact surface with which the connecting ring 9 is glued to the circular cylindrical outer casing wall 3 of the member 2, wherein the inner casing wall 22 is provided with longitudinal grooves 23 which form distribution channels for an adhesive by means of which the connecting ring 9 is glued to the circular cylindrical outer casing wall 3 of the member 2.
- the connecting ring 9 has a plurality of first screw channels 24 (Fig.
- the joint support ring 6 of the joint body 5 has a corresponding number of a plurality of second screw channels 25 evenly distributed over a circumference, wherein the first screw channels 24 and the second screw channels 25 are designed to receive screws 26 for screwing the connecting ring 9 to the joint support ring 6.
Landscapes
- Engineering & Computer Science (AREA)
- Robotics (AREA)
- Mechanical Engineering (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022134703.6A DE102022134703B3 (de) | 2022-12-23 | 2022-12-23 | Verbindungsvorrichtung mit mehreren auf einem Umfang angeordneten Eingriffselementen und Roboterarm |
| PCT/EP2023/081810 WO2024132301A1 (de) | 2022-12-23 | 2023-11-15 | Verbindungsvorrichtung und roboterarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4638063A1 true EP4638063A1 (de) | 2025-10-29 |
Family
ID=88839667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23808739.9A Pending EP4638063A1 (de) | 2022-12-23 | 2023-11-15 | Verbindungsvorrichtung und roboterarm |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4638063A1 (de) |
| CN (1) | CN120418046A (de) |
| DE (1) | DE102022134703B3 (de) |
| WO (1) | WO2024132301A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102024112446B3 (de) * | 2024-05-03 | 2025-06-18 | Neura Robotics GmbH | Flanschverbindung mit mindestens einem Klemmkörper sowie Roboterarm |
| CN119017368A (zh) * | 2024-08-23 | 2024-11-26 | 具身智能科技(嘉兴)有限公司 | 一种模块化的机器人 |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE8605070L (sv) | 1986-11-26 | 1988-05-27 | Komatsu Mfg Co Ltd | Bojlig robotarm |
| IT1211195B (it) | 1987-07-10 | 1989-10-12 | Bruno Bisiach | Robot industriale a molteplici articolazioni a piu gradi di liberta di movimento |
| DE59305404D1 (de) | 1992-02-29 | 1997-03-20 | Staedele Berta | Vorrichtung zum manipulieren von gegenständen |
| US8992113B2 (en) | 2009-06-08 | 2015-03-31 | Re2, Inc. | Robust manual connector for robotic arm end effector |
| US9915319B2 (en) * | 2014-09-29 | 2018-03-13 | Delbert Tesar | Compact parallel eccentric rotary actuator |
| DE102015012960B4 (de) | 2015-08-14 | 2021-09-16 | Franka Emika Gmbh | Robotersystem und Gehäuseteil für ein solches Robotersystem |
| CA3012573C (en) | 2015-10-06 | 2024-05-14 | Impossible Incorporated Llc | Snake-like robot |
| NL2016878B1 (en) | 2016-06-02 | 2018-01-25 | State Of The Art Ltd | Link for an articulated manipulator |
| DK3348361T3 (da) * | 2017-01-13 | 2022-03-21 | Universal Robots As | Fastspændt flangesamling |
| DE102019120135A1 (de) * | 2019-07-25 | 2021-01-28 | Beckhoff Automation Gmbh | Armmodul für einen modularen Roboterarm eines Industrieroboters |
| CN112549069B (zh) * | 2020-12-08 | 2022-03-01 | 广东博智林机器人有限公司 | 机械臂关节结构及机械臂 |
-
2022
- 2022-12-23 DE DE102022134703.6A patent/DE102022134703B3/de active Active
-
2023
- 2023-11-15 WO PCT/EP2023/081810 patent/WO2024132301A1/de not_active Ceased
- 2023-11-15 CN CN202380088417.5A patent/CN120418046A/zh active Pending
- 2023-11-15 EP EP23808739.9A patent/EP4638063A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE102022134703B3 (de) | 2024-05-02 |
| WO2024132301A1 (de) | 2024-06-27 |
| CN120418046A (zh) | 2025-08-01 |
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