Robot having at least one covering and at least one contact sensor

Patent metadata

Field	Value
Publication number	US-2022203563-A1
Application number	US-202017429008-A
Country	US
Kind code	A1
Filing date	Feb 4, 2020
Priority date	Feb 6, 2019
Publication date	Jun 30, 2022
Grant date	—

Abstract

A robot includes a robot arm having a plurality of motor-driven joints and a plurality of links, each of which interconnect two adjacent joints. At least one of the links has a supporting structural component configured to transmit forces and/or torques from an adjacent joint to the other adjacent joint. The structural component is provided with at least one covering that at least partially covers the structural component and at least one contact sensor. The at least one contact sensor is configured as a switching strip arranged between the structural component and the covering. Movable mounting of the covering on the structural component, which mounting is spring-preloaded into the basic position of the covering, is adjusted by an inherent elasticity of the switching strip.

First claim

1 - 10 . (canceled)

11 . A robot, comprising:
a robot arm having a plurality of motor-driven joints and a plurality of links, each link interconnecting two adjacent joints; at least one of the plurality of links comprises a supporting structural component configured to transmit at least one of forces or torques from an adjacent joint ( 5 . 1 ) to the other adjacent joint; and at least one covering on the structural component, the covering at least partially covering the structural component and at least one contact sensor; wherein the at least one contact sensor is configured as a switching strip arranged between the structural component and the covering; and wherein the covering is movably mounted on the structural component and is spring-loaded into an initial position, the covering being adjustable by an inherent elasticity of the switching strip.

12 . The robot of claim 11 , wherein:
the covering comprises a central wall portion configured to cover a first surface of the structural component, and comprises at least two side wall portions that delimit the central wall portion from opposite sides; at least a first side wall portion of the covering at least partially overlaps a second surface of the structural component; at least a second side wall portion of the covering at least partially overlaps a third surface of the structural component which is opposite the second surface of the structural component; and at least one of:
the second surface of the structural component comprises at least one first projection that cooperates with a first undercut on the inside of the first side wall portion of the covering in order to keep the covering spring-loaded in its initial position on the structural component, and thereby prevent the covering from detaching from the structural component, or
the third surface of the structural component comprises at least one second projection that cooperates with a second undercut on the inside of the second side wall portion of the covering in order to hold the covering spring-loaded in its initial position on the structural component, and thereby prevent the covering from detaching from the structural component.

13 . The robot of claim 12 , wherein at least one of:
the first projection of the structural component comprises a first guide element that is integrally formed on the structural component, or is a separately formed first guide element that is fastened on the structural component, and the first undercut of the covering that encompasses the first guide element is formed as a first bent portion or a first groove of the first side wall portion; or the second projection of the structural component comprises a second guide element that is integrally formed on the structural component, or is a separately formed second guide element that is fastened on the structural component, and the second undercut of the covering that encompasses the second guide element is formed by a second bent portion or a second groove of the second side wall portion.

14 . The robot of claim 12 , wherein at least one of:
the first projection of the structural component is formed by a first switching strip fastened to the structural component, and the first undercut of the covering that encompasses the first switching strip is formed by a first bent portion of the first side wall portion; or the second projection of the structural component is formed by a second switching strip fastened on the structural component, and the second undercut of the covering that encompasses the second switching strip is formed by a second bent portion of the second side wall portion.

15 . The robot of claim 14 , wherein:
at least one of the first switching strip or the second switching strip is connected to a control device of the robot; the control device is configured to generate a signal that indicates an error status when the covering is detached from the structural component; and when the covering is detached from the structural component, at least one of:
the first bent portion of the first side wall portion of the covering actuates the first switching strip, or
the second bent portion of the second side wall portion of the covering actuates the second switching strip.

16 . The robot of claim 11 , wherein:
the covering comprises a central wall portion configured to cover a first surface of the structural component, and comprises at least two side wall portions that delimit the central wall portion from opposite sides; at least a first side wall portion of the covering at least partially overlaps a second surface of the structural component; at least a second side wall portion of the covering at least partially overlaps a third surface of the structural component which is opposite the second surface of the structural component; and at least one of:
the second surface of the structural component comprises at least one undercut that cooperates with a first projection that is formed by a first switching strip on the inside of the first side wall portion of the covering in order to keep the covering spring-loaded in its initial position on the structural component and thereby prevent the covering from detaching from the structural component, or
the third surface of the structural component comprises at least one second undercut that cooperates with a second projection that is formed by a second switching strip on the inside of the second side wall portion of the covering in order to keep the covering spring-loaded in its initial position on the structural component and thereby prevent it from detaching from the structural component.

17 . The robot of claim 16 , wherein:
at least one of the first switching strip or the second switching strip is connected to a control device of the robot; the control device is configured to generate a signal that indicates an error status when the covering is detached from the structural component; and when the covering is detached from the structural component, at least one of:
the first undercut of the second surface of structural component actuates the first switching strip of the covering, or
the second undercut of the third surface of the structural component actuates the second switching strip of the covering.

18 . The robot of claim 11 , wherein the at least one switching strip is configured as an electromechanical switch comprising at least one electrical conductor which is embedded in an electrically insulating profile made of an elastic material.

19 . The robot according of claim 11 , wherein:
the covering comprises a central wall portion configured to cover a first surface of the structural component, and comprises at least two side wall portions delimiting the central wall portion from opposite sides; at least a first side wall portion of the covering at least partially overlaps a second surface of the structural component; at least a second side wall portion of the covering at least partially overlaps a third surface of the structural component which is opposite the second surface of the structural component; and at least one of:
an inside portion of the covering that faces the structural component comprises one or more protruding ribs that are configured to come in contact with the at least one switching strip in such a way that the one or more of the protruding ribs actuate the at least one switching strip when the covering moves relative to the structural component, or
an outer side of the structural component that faces the covering comprises one or more protruding ribs that are configured to come in contact with the at least one switching strip in such a way that the one or more protruding ribs actuate the at least one switchin

Assignees

• Kuka Deutschland Gmbh

Inventors

• Wuensch Markus
• Zumpe Veronika

Classifications

• B25J19/063 Primary

  working only upon contact with an outside object · CPC title

• B25J9/1674

  characterised by safety, monitoring, diagnostic · CPC title